reglab/statecodes huggingface dataset:
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart D - Air Quality, Radiation, and Physical Agents Air Quality-Surface and Underground › Section 57.5047 - Gamma radiation surveys

Current through July 13, 2024
(a) Gamma radiation
				  surveys shall be conducted annually in all underground mines where radioactive
				  ores are mined.
(b) Surveys shall
				  be in accordance with American National Standards (ANSI) Standard N13.8-1973,
				  entitled "Radiation Protection in Uranium Mines", section 14.1 page 12, which
				  is hereby incorporated by reference and made a part hereof. This publication
				  may be examined in any Metal and Non-metal Mine Safety and Health Subdistrict
				  Office, Mine Safety and Health Administration, or may be obtained from the
				  American National Standards Institute, Inc., 1430 Broadway, New York, NY
				  10018.
(c) Where average gamma
				  radiation measurements are in excess of 2.0 milliroentgens per hour in the
				  working place, gamma radiation dosimeters shall be provided for all persons
				  affected, and records of cumulative individual gamma radiation exposure shall
				  be kept.
(d) Annual individual
				  gamma radiation exposure shall not exceed 5 rems.
Physical Agents-Surface and Underground
Approved by the Office of Management and Budget under
						control number 1219-0039
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart D - Air Quality, Radiation, and Physical Agents Air Quality-Surface and Underground › Section 57.5050 - Exposure limits for noise

Current through July 13, 2024
(a) No employee
				  shall be permitted an exposure to noise in excess of that specified in the
				  table below. Noise level measurements shall be made using a sound level meter
				  meeting specifications for type 2 meters contained in American National
				  Standards Institute (ANSI) Standard S1.4-1971, "General Purpose Sound Level
				  Meters," approved April 27, 1971, which is hereby incorporated by reference and
				  made a part hereof, or by a dosimeter with similar accuracy. This publication
				  may be obtained from the American National Standards Institute, Inc., 1430
				  Broadway, New York, New York 10018, or may be examined in any Metal and
				  Nonmetal Mine Health and Safety District or Subdistrict Office of the Mine
				  Safety and Health Administration.
PERMISSIBLE NOISE EXPOSURES
Duration per day, hours of exposure
Sound level dBA, slow response
8
90
6
92
4
95
3
97
2
100
1 1/2
102
1
105
1/2
110
1/4 or less
115
No exposure shall exceed 115 dBA. Impact or impulsive
					 noises shall not exceed 140 dB, peak sound pressure level.
Note: When the daily noise exposure is composed of two or
					 more periods of noise exposure at different levels, their combined effect shall
					 be considered rather than the individual effect on each.
If the sum
(C1/T1)+(C2/T2)+ . . . (Cn/Tn)
exceeds unity, then the mixed exposure shall be considered
					 to exceed the permissible exposure. Cn indicates the total time of exposure at
					 a specified noise level, and Tn indicates the total time of exposure permitted
					 at that level. Interpolation between tabulated values may be determined by the
					 following formula:
Log T = 6.322-0.0602 SL
Where T is the time in hours and SL is the sound level in
					 dBA.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6100 - Separation of stored explosive material

Current through July 13, 2024
(a) Detonators
				  shall not be stored in the same magazine with other explosive
				  material.
(b) When stored in the
				  same magazine, blasting agents shall be separated from explosives, safety fuse,
				  and detonating cord to prevent contamination.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6101 - Areas around explosive material storage facilities

Current through July 13, 2024
(a) Areas
				  surrounding storage facilities for explosive material shall be clear of
				  rubbish, brush, dry grass, and trees for 25 feet in all directions, except that
				  live trees 10 feet or taller need not be removed.
(b) Other combustibles shall not be stored or
				  allowed to accumulate within 50 feet of explosive material. Combustible liquids
				  shall be stored in a manner that ensures drainage will occur away from the
				  explosive material storage facility in case of tank rupture.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6102 - Explosive material storage practices

Current through July 13, 2024
(a) Explosive
				  material shall be-
(1) Stored in a manner to
				  facilitate use of oldest stocks first;
(2) Stored according to brand and grade in
				  such a manner as to facilitate identification; and
(3) Stacked in a stable manner but not more
				  than 8 feet high.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6130 - Explosive material storage facilities

Current through July 13, 2024
(a) Detonators and
				  explosives shall be stored in magazines.
(b) Packaged blasting agents shall be stored
				  in a magazine or other facility which is ventilated to prevent dampness and
				  excessive heating, weather-resistant, and locked or attended. Drop trailers
				  that are currently licensed by the Federal, State, or local authorities for
				  over-the-road use do not have to be ventilated. Facilities other than magazines
				  used to store blasting agents shall contain only blasting agents.
(c) Bulk blasting agents shall be stored in
				  weather-resistant bins or tanks which are locked, attended, or otherwise
				  inaccessible to unauthorized entry.
(d) Facilities, bins or tanks shall be posted
				  with the appropriate United States Department of Transportation placards or
				  other appropriate warning signs that indicate the contents and are visible from
				  each approach.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6131 - Location of explosive material storage facilities

Current through July 13, 2024
(a)
				  Storage facilities for any explosive material shall be-
(1) Located so that the forces generated by a
				  storage facility explosion will not create a hazard to occupants in mine
				  buildings and will not damage dams or electric substations; and
(2) Detached structures located outside the
				  blast area and a sufficient distance from powerlines so that the powerlines, if
				  damaged, would not contact the magazines.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6132 - Magazine requirements

Current through July 13, 2024
(a) Magazines shall
				  be-
(1) Structurally sound;
(2) Noncombustible or the exterior covered
				  with fire-resistant material;
(3)
				  Bullet resistant;
(4) Made of
				  nonsparking material on the inside;
(5) Ventilated to control dampness and
				  excessive heating within the magazine;
(6) Posted with the appropriate United States
				  Department of Transportation placards or other appropriate warning signs that
				  indicate the contents and are visible from each approach, so located that a
				  bullet passing through any of the signs will not strike the magazine;
(7) Kept clean and dry inside;
(8) Unlighted or lighted by devices that are
				  specifically designed for use in magazines and which do not create a fire or
				  explosion hazard;
(9) Unheated or
				  heated only with devices that do not create a fire or explosion
				  hazard;
(10) Locked when
				  unattended; and
(11) Used
				  exclusively for the storage of explosive material except for essential
				  nonsparking equipment used for the operation of the magazine.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6133 - Powder chests

Current through July 13, 2024
(a) Powder chests
				  (day boxes) shall be-
(1) Structurally sound,
				  weather-resistant, equipped with a lid or cover, and with only nonsparking
				  material on the inside;
(2) Posted
				  with the appropriate United States Department of Transportation placards or
				  other appropriate warning signs that indicate the contents and are visible from
				  each approach;
(3) Located out of
				  the blast area once loading has been completed;
(4) Locked or attended when containing
				  explosive material; and
(5) Emptied
				  at the end of each shift with the contents returned to a magazine or other
				  storage facility, or attended.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6160 - Main facilities

Current through July 13, 2024
(a) Main facilities
				  used to store explosive material underground shall be located-
(1) In stable or supported ground;
(2) So that a fire or explosion in the
				  storage facilities will not prevent escape from the mine, or cause detonation
				  of the contents of another storage facility;
(3) Out of the line of blasts, and protected
				  from vehicular traffic, except that accessing the facility;
(4) At least 200 feet from work places or
				  shafts;
(5) At least 50 feet from
				  electric substations;
(6) A safe
				  distance from trolley wires; and
(7) At least 25 feet from detonator storage
				  facilities.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6161 - Auxiliary facilities

Current through July 13, 2024
(a) Auxiliary
				  facilities used to store explosive material near work places shall be wooden,
				  box-type containers equipped with covers or doors, or facilities constructed or
				  mined-out to provide equivalent impact resistance and confinement.
(b) The auxiliary facilities shall be-
(1) Constructed of nonsparking material on
				  the inside when used for the storage of explosives;
(2) Kept clean, suitably dry, and
				  orderly;
(3) Kept in
				  repair;
(4) Located out of the line
				  of blasts so they will not be subjected to damaging shock or flyrock;
(5) Identified with warning signs or coded to
				  indicate the contents with markings visible from any approach;
(6) Located at least 15 feet from all
				  haulageways and electrical equipment, or placed entirely within a mined-out
				  recess in the rib used exclusively for explosive material;
(7) Filled with no more than a one-week
				  supply of explosive material;
(8)
				  Separated by at least 25 feet from other facilities used to store detonators;
				  and
(9) Kept securely locked unless
				  all access to the mine is either locked or attended.
TRANSPORTATION-SURFACE AND UNDERGROUND
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6200 - Delivery to storage or blast site areas

Current through July 13, 2024
Explosive material shall be transported without undue delay
					 to the storage area or blast site.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6201 - Separation of transported explosive material

Current through July 13, 2024
Detonators shall not be transported on the same vehicle or
					 conveyance with other explosives except as follows:
(a) Detonators in quantities of more than
				  1000 may be transported in a vehicle or conveyance with explosives or blasting
				  agents provided the detonators are-
(1)
				  Maintained in the original packaging as shipped from the manufacturer;
				  and
(2) Separated from the
				  explosives or blasting agents by 4-inches of hardwood, laminated partition, or
				  equivalent. The hardwood, laminated partition, or equivalent shall be fastened
				  to the vehicle or conveyance.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6202 - Vehicles

Current through July 13, 2024
(a) Vehicles containing explosive material
				  shall be-
(1) Maintained in good condition
				  and shall comply with the requirements of subpart M of this part;
(2) Equipped with sides and enclosures higher
				  than the explosive material being transported or have the explosive material
				  secured to a nonconductive pallet;
(3) Equipped with a cargo space that shall
				  contain the explosive material (passenger areas shall not be considered cargo
				  space);
(4) Equipped with at least
				  two multipurpose dry-chemical fire extinguishers or one such extinguisher and
				  an automatic fire suppression system;
(5) Posted with warning signs that indicate
				  the contents and are visible from each approach;
(6) Occupied only by persons necessary for
				  handling the explosive material;
(7) Attended or the cargo compartment locked
				  at surface areas of underground mines, except when parked at the blast site and
				  loading is in progress; and
(8)
				  Secured while parked by having-
(i) The
				  brakes set;
(ii) The wheels chocked
				  if movement could occur; and
(iii)
				  The engine shut off unless powering a device being used in the loading
				  operation.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6203 - Locomotives

Current through July 13, 2024
Explosive material shall not be transported on a
					 locomotive. When explosive material is hauled by trolley locomotive, covered,
					 electrically insulated cars shall be used.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6204 - Hoists

Current through July 13, 2024
(a) Before explosive material is transported
				  in hoist conveyances-
(1) The hoist operator
				  shall be notified; and
(2) Hoisting
				  in adjacent shaft compartments, except for empty conveyances or counterweights,
				  shall be stopped until transportation of the explosive material is
				  completed.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6205 - Conveying explosives by hand

Current through July 13, 2024
Closed, nonconductive containers shall be used to carry
					 explosives and detonators to and from blast sites. Separate containers shall be
					 used for explosives and detonators.
USE-SURFACE AND UNDERGROUND
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6300 - Control of blasting operations

Current through July 13, 2024
(a) Only persons
				  trained and experienced in the handling and use of explosive material shall
				  direct blasting operations and related activities.
(b) Trainees and inexperienced persons shall
				  work only in the immediate presence of persons trained and experienced in the
				  handling and use of explosive material.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6301 - Blasthole obstruction check

Current through July 13, 2024
Before loading, blastholes shall be checked and, wherever
					 possible, cleared of obstructions.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6302 - Explosive material protection

Current through July 13, 2024
(a) Explosives and
				  blasting agents shall be kept separated from detonators until loading
				  begins.
(b) Explosive material
				  shall be protected from impact and temperatures in excess of 150 oF when taken
				  to the blast site.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6303 - Initiation preparation

Current through July 13, 2024
(a) Primers shall
				  be made up only at the time of use and as close to the blast site as conditions
				  allow.
(b) Primers shall be
				  prepared with the detonator contained securely and completely within the
				  explosive or contained securely and appropriately for its design in the tunnel
				  or cap well.
(c) When using
				  detonating cord to initiate another explosive, a connection shall be prepared
				  with the detonating cord threaded through, attached securely to, or otherwise
				  in contact with the explosive.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6304 - Primer protection

Current through July 13, 2024
(a) Tamping shall
				  not be done directly on a primer.
(b) Rigid cartridges of explosives or
				  blasting agents that are 4 inches (100 millimeters) in diameter or larger shall
				  not be dropped on the primer except where the blasthole contains sufficient
				  depth of water to protect the primer from impact. Slit packages of prill, water
				  gel, or emulsions are not considered rigid cartridges and may be drop
				  loaded.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6305 - Unused explosive material

Current through July 13, 2024
Unused explosive material shall be moved to a protected
					 location as soon as practical after loading operations are
					 completed.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6306 - Loading and blasting

Current through July 13, 2024
(a) Vehicles and
				  equipment shall not be driven over explosive material or initiating systems in
				  a manner which could contact the material or system, or create other
				  hazards.
(b) Once loading begins,
				  the only activities permitted within the blast site shall be those activities
				  directly related to the blasting operation and the activities of surveying,
				  stemming, sampling of geology, and reopening of holes provided that reasonable
				  care is exercised. Haulage activity is permitted near the base of the highwall
				  being loaded provided no other haulage access exists.
(c) Loading shall be continuous except where
				  adverse circumstances such as unfavorable atmospheric conditions, large
				  equipment failure, or circumstances beyond the operator's control necessitate
				  an interruption in loading.
(d) In
				  electric blasting prior to connecting to the power source and in nonelectric
				  blasting prior to attaching an initiating device, all persons shall leave the
				  blast area except persons in a blasting shelter or other location that protects
				  them from concussion (shock wave), flying material, and gases.
(e) When loading is completed and circuits
				  are connected, the blasts shall be fired without undue delay unless adverse
				  circumstances such as unfavorable atmospheric conditions, large equipment
				  failure, or circumstances beyond the operator's control necessitate delay. If
				  the time between the connection of circuits and the firing of the blast will
				  exceed 72 hours, the operator shall notify the appropriate MSHA District Office
				  and the State Mine Inspector before the 72 hours has elapsed.
(f) Before firing a blast-
(1) Ample warning shall be given to allow all
				  persons to be evacuated;
(2) Clear
				  exit routes shall be provided for persons firing the round; and
(3) All access routes to the blast area shall
				  be guarded or barricaded to prevent the passage of persons or
				  vehicles.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6307 - Drill stem loading

Current through July 13, 2024
Explosive material shall not be loaded into blastholes with
					 drill stem equipment or other devices that could be extracted while containing
					 explosive material. The use of loading hose, collar sleeves, or collar pipes is
					 permitted.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6309 - Fuel oil requirements for ANFO

Current through July 13, 2024
(a) Liquid
				  hydrocarbon fuels with flash points lower than that of No. 2 diesel oil (125
				  oF) shall not be used to prepare ammonium nitrate-fuel oil, except that diesel
				  fuels with flash points no lower than 100 oF may be used at ambient air
				  temperatures below 45 oF.
(b) Waste
				  oil, including crankcase oil, shall not be used to prepare ammonium
				  nitrate-fuel oil.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6310 - Misfire waiting period

Current through July 13, 2024
When a misfire is suspected, persons shall not enter the
					 blast area-
(a) For 30 minutes if
				  safety fuse and blasting caps are used; or
(b) For 15 minutes if any other type
				  detonators are used.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6311 - Handling of misfires

Current through July 13, 2024
(a) Faces and muck
				  piles shall be examined for misfires after each blasting operation.
(b) Only work necessary to remove a misfire
				  and protect the safety of miners engaged in the removal shall be permitted in
				  the affected area until the misfire is disposed of in a safe manner.
(c) When a misfire cannot be disposed of
				  safely, each approach to the area affected by the misfire shall be posted with
				  a warning sign at a conspicuous location to prohibit entry, and the condition
				  shall be reported immediately to mine management.
(d) Misfires occurring during the shift shall
				  be reported to mine management not later than the end of the shift.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6313 - Blast site security

Current through July 13, 2024
Areas in which loading is suspended or loaded holes are
					 awaiting firing shall be attended, barricaded and posted, or flagged against
					 unauthorized entry.
ELECTRIC BLASTING-SURFACE AND UNDERGROUND
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6400 - Compatibility of electric detonators

Current through July 13, 2024
All electric detonators to be fired in a round shall be
					 from the same manufacturer and shall have similar electrical firing
					 characteristics.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6401 - Shunting

Current through July 13, 2024
Except during testing-
(a) Electric detonators shall be kept shunted
				  until connected to the blasting line or wired into a blasting round;
(b) Wired rounds shall be kept shunted until
				  connected to the blasting line; and
(c) Blasting lines shall be kept shunted
				  until immediately before blasting.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6402 - Deenergized circuits near detonators

Current through July 13, 2024
Electrical distribution circuits within 50 feet of electric
					 detonators at the blast site shall be deenergized. Such circuits need not be
					 deenergized between 25 to 50 feet of the electric detonators if stray current
					 tests, conducted as frequently as necessary, indicate a maximum stray current
					 of less than 0.05 amperes through a 1-ohm resistor as measured at the blast
					 site.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6403 - Branch circuits

Current through July 13, 2024
(a) If electric
				  blasting includes the use of branch circuits, each branch shall be equipped
				  with a safety switch or equivalent method to isolate the circuits to be
				  used.
(b) At least one safety
				  switch or equivalent method of protection shall be located outside the blast
				  area and shall be in the open position until persons are withdrawn.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6404 - Separation of blasting circuits from power source

Current through July 13, 2024
(a)
				  Switches used to connect the power source to a blasting circuit shall be locked
				  in the open position except when closed to fire the blast.
(b) Lead wires shall not be connected to the
				  blasting switch until the shot is ready to be fired.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6405 - Firing devices

Current through July 13, 2024
(a) Power sources
				  shall be capable of delivering sufficient current to energize all electric
				  detonators to be fired with the type of circuits used. Storage or dry cell
				  batteries are not permitted as power sources.
(b) Blasting machines shall be tested,
				  repaired, and maintained in accordance with manufacturer's
				  instructions.
(c) Only the blaster
				  shall have the key or other control to an electrical firing device.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6406 - Duration of current flow

Current through July 13, 2024
If any part of a blast is connected in parallel and is to
					 be initiated from powerlines or lighting circuits, the time of current flow
					 shall be limited to a maximum of 25 milliseconds. This can be accomplished by
					 incorporating an arcing control device in the blasting circuit or by
					 interrupting the circuit with an explosive device attached to one or both lead
					 lines and initiated by a 25-millisecond delay electric
					 detonator.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6407 - Circuit testing

Current through July 13, 2024
A blasting galvanometer or other instrument designed for
					 testing blasting circuits shall be used to test the following:
(a) In surface operations-
(1) Continuity of each electric detonator in
				  the blasthole prior to stemming and connection to the blasting line;
(2) Resistance of individual series or the
				  resistance of multiple balanced series to be connected in parallel prior to
				  their connection to the blasting line;
(3) Continuity of blasting lines prior to the
				  connection of electric detonator series; and
(4) Total blasting circuit resistance prior
				  to connection to the power source.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6500 - Damaged initiating material

Current through July 13, 2024
A visual check of the completed circuit shall be made to
					 ensure that the components are properly aligned and connected. Safety fuse,
					 igniter cord, detonating cord, shock or gas tubing, and similar material which
					 is kinked, bent sharply, or damaged shall not be used.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6501 - Nonelectric initiation systems

Current through July 13, 2024
(a) When the
				  nonelectric initiation system uses shock tube-
(1) Connections with other initiation devices
				  shall be secured in a manner which provides for uninterrupted
				  propagation;
(2) Factory-made units
				  shall be used as assembled and shall not be cut except that a single splice is
				  permitted on the lead-in trunkline during dry conditions; and
(3) Connections between blastholes shall not
				  be made until immediately prior to clearing the blast site when surface delay
				  detonators are used.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6502 - Safety fuse

Current through July 13, 2024
(a) The burning
				  rate of each spool of safety fuse to be used shall be measured, posted in
				  locations which will be conspicuous to safety fuse users, and brought to the
				  attention of all persons involved with the blasting operation.
(b) When firing with safety fuse ignited
				  individually using handheld lighters, the safety fuse shall be of lengths which
				  provide at least the minimum burning time for a particular size round, as
				  specified in the following table.
TABLE E-1-SAFETY FUSE-MINIMUM BURNING TIME
Number of holes
Minimum burning
in a round
time
1.....................................
2-5..................................
6-10................................
11 to 15.........................
2 minutes/1
2 minutes 40 seconds
3 minutes 20 seconds
5 minutes.
1/For example, at least a 36-inch length of
					 40-second-per-foot safety fuse or at least a 48-inch length of
					 30-second-per-foot safety fuse would have to be used to allow sufficient time
					 to evacuate the area.
(c)
				  Where flyrock might damage exposed safety fuse, the blast shall be timed so
				  that all safety fuses are burning within the blastholes before any blasthole
				  detonates.
(d) Fuse shall be cut
				  and capped in dry locations.
(e)
				  Blasting caps shall be crimped to fuse only with implements designed for that
				  purpose.
(f) Safety fuse shall be
				  ignited only after the primer and the explosive material are securely in
				  place.
(g) Safety fuse shall be
				  ignited only with devices designed for that purpose. Carbide lights, liquefied
				  petroleum gas torches, and cigarette lighters shall not be used to light safety
				  fuse.
(h) At least two persons
				  shall be present when lighting safety fuse, and no one shall light more than 15
				  individual fuses. If more than 15 holes per person are to be fired, electric
				  initiation systems, igniter cord and connectors, or other nonelectric
				  initiation systems shall be used.
EXTRANEOUS ELECTRICITY-SURFACE AND UNDERGROUND
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6600 - Loading practices

Current through July 13, 2024
If extraneous electricity is suspected in an area where
					 electric detonators are used, loading shall be suspended until tests determine
					 that stray current does not exceed 0.05 amperes through a 1-ohm resister when
					 measured at the location of the electric detonators. If greater levels of
					 extraneous electricity are found, the source shall be determined and no loading
					 shall take place until the condition is corrected.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6602 - Static electricity dissipation during loading

Current through July 13, 2024
When explosive material is loaded pneumatically or dropped
					 into a blasthole in a manner that could generate static electricity-
(a) An evaluation of the potential static
				  electricity hazard shall be made and any hazard shall be eliminated before
				  loading begins;
(b) The loading
				  hose shall be of a semiconductive type, have a total of not more than 2 megohms
				  of resistance over its entire length and not less than 1000 ohms of resistance
				  per foot;
(c) Wire-countered hoses
				  shall not be used;
(d) Conductive
				  parts of the loading equipment shall be bonded and grounded and grounds shall
				  not be made to other potential sources of extraneous electricity; and
(e) Plastic tubes shall not be used as hole
				  liners if the hole contains an electric detonator.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6604 - Precautions during storms

Current through July 13, 2024
During the approach and progress of an electrical
					 storm-
(a) Surface blasting operations
				  shall be suspended and persons withdrawn from the blast area or to a safe
				  location.
(b) Underground
				  electrical blasting operations that are capable of being initiated by lightning
				  shall be suspended and all persons withdrawn from the blast area or to a safe
				  location.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6605 - Isolation of blasting circuits

Current through July 13, 2024
Lead wires and blasting lines shall be isolated and
					 insulated from power conductors, pipelines, and railroad tracks, and shall be
					 protected from sources of stray or static electricity. Blasting circuits shall
					 be protected from any contact between firing lines and overhead powerlines
					 which could result from the force of a blast.
EQUIPMENT/TOOLS-SURFACE AND UNDERGROUND
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6700 - Nonsparking tools

Current through July 13, 2024
Only nonsparking tools shall be used to open containers of
					 explosive material or to punch holes in explosive cartridges.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6701 - Tamping and loading pole requirements

Current through July 13, 2024
Tamping and loading poles shall be of wood or other
					 nonconductive, nonsparking material. Couplings for poles shall be
					 nonsparking.
MAINTENANCE-SURFACE AND UNDERGROUND
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6800 - Storage facilities

Current through July 13, 2024
When repair work which could produce a spark or flame is to
					 be performed on a storage facility-
(a) The explosive material shall be moved to
				  another facility, or moved at least 50 feet from the repair activity and
				  monitored; and
(b) The facility
				  shall be cleaned to prevent accidental detonation.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6802 - Bulk delivery vehicles

Current through July 13, 2024
No welding or cutting shall be performed on a bulk delivery
					 vehicle until the vehicle has been washed down and all explosive material has
					 been removed. Before welding or cutting on a hollow shaft, the shaft shall be
					 thoroughly cleaned inside and out and vented with a minimum 1/2-inch diameter
					 opening to allow for sufficient ventilation.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6803 - Blasting lines

Current through July 13, 2024
Permanent blasting lines shall be properly supported. All
					 blasting lines shall be insulated and kept in good repair.
GENERAL REQUIREMENTS-SURFACE AND
					 UNDERGROUND
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6900 - Damaged or deteriorated explosive material

Current through July 13, 2024
Damaged or deteriorated explosive material shall be
					 disposed of in a safe manner in accordance with the instructions of the
					 manufacturer.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6901 - Black powder

Current through July 13, 2024
(a) Black powder
				  shall be used for blasting only when a desired result cannot be obtained with
				  another type of explosive, such as in quarrying certain types of dimension
				  stone.
(b) Containers of black
				  powder shall be-
(1) Nonsparking;
(2) Kept in a totally enclosed cargo space
				  while being transported by a vehicle;
(3) Securely closed at all times when-
(i) Within 50 feet of any magazine or open
				  flame,
(ii) Within any building in
				  which a fuel-fired or exposed-element electric heater is operating,
				  or
(iii) In an area where
				  electrical or incandescent-particle sparks could result in powder ignition;
				  and
(4) Opened only when
				  the powder is being transferred to a blasthole or another container and only in
				  locations not listed in paragraph (b)(3) of this section.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6902 - Excessive temperatures

Current through July 13, 2024
(a) Where heat
				  could cause premature detonation, explosive material shall not be loaded into
				  hot areas, such as kilns or sprung holes.
(b) When blasting sulfide ores where hot
				  holes occur that may react with explosive material in blastholes, operators
				  shall-
(1) Measure an appropriate number of
				  blasthole temperatures in order to assess the specific mine conditions prior to
				  the introduction of explosive material;
(2) Limit the time between the completion of
				  loading and the initiation of the blast to no more than 12 hours; and
(3) Take other special precautions to address
				  the specific conditions at the mine to prevent premature detonation.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6903 - Burning explosive material

Current through July 13, 2024
If explosive material is suspected of burning at the blast
					 site, persons shall be evacuated from the endangered area and shall not return
					 for at least one hour after the burning or suspected burning has
					 stopped.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6904 - Smoking and open flames

Current through July 13, 2024
Smoking and use of open flames shall not be permitted
					 within 50 feet of explosive material except when separated by permanent
					 noncombustible barriers. This standard does not apply to devices designed to
					 ignite safety fuse or to heating devices which do not create a fire or
					 explosion hazard.
GENERAL REQUIREMENTS-UNDERGROUND ONLY
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart E - Explosives › Section 57.6960 - Mixing of explosive material

Current through July 13, 2024
(a) The mixing of
				  ingredients to produce explosive material shall not be conducted underground
				  unless prior approval of the MSHA district manager is obtained. In granting or
				  withholding approval, the district manager shall consider the potential hazards
				  created by-
(1) The location of the stored
				  material and the storage practices used;
(2) The transportation and use of the
				  explosive material;
(3) The nature
				  of the explosive material, including its sensitivity;
(4) Any other factor deemed relevant to the
				  safety of miners potentially exposed to the hazards associated with the mixing
				  of the bulk explosive material underground.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart F - Drilling and Rotary Jet Piercing › Section 57.7002 - Equipment defects

Current through July 13, 2024
Drilling-Surface Only
Equipment defects affecting safety shall be corrected
					 before the equipment is used.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart F - Drilling and Rotary Jet Piercing › Section 57.7003 - Drill area inspection

Current through July 13, 2024
The drilling area shall be inspected for hazards before
					 starting the drilling operations.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart F - Drilling and Rotary Jet Piercing › Section 57.7004 - Drill mast

Current through July 13, 2024
Persons shall not be on a mast while the drill-bit is in
					 operation unless they are provided with a safe platform from which to work and
					 they are required to use safety belts to avoid falling.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart F - Drilling and Rotary Jet Piercing › Section 57.7005 - Augers and drill stems

Current through July 13, 2024
Drill crews and others shall stay clear of augers or drill
					 stems that are in motion. Persons shall not pass under or step over a moving
					 stem or auger.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart F - Drilling and Rotary Jet Piercing › Section 57.7008 - Moving the drill

Current through July 13, 2024
When a drill is being moved from one drilling area to
					 another, drill steel, tools, and other equipment shall be secured and the mast
					 placed in a safe position.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart F - Drilling and Rotary Jet Piercing › Section 57.7009 - Drill helpers

Current through July 13, 2024
If a drill helper assists the drill operator during
					 movement of a drill to a new location, the helper shall be in sight of, or in
					 communication with, the operator at all times.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart F - Drilling and Rotary Jet Piercing › Section 57.7010 - Power failures

Current through July 13, 2024
In the event of power failure, drill controls shall be
					 placed in the neutral position until power is restored.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart F - Drilling and Rotary Jet Piercing › Section 57.7011 - Straightening crossed cables

Current through July 13, 2024
The drill stem shall be resting on the bottom of the hole
					 or on the platform with the stem secured to the mast before attempts are made
					 to straighten a crossed cable on a reel.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart F - Drilling and Rotary Jet Piercing › Section 57.7012 - Tending drills in operation

Current through July 13, 2024
While in operation, drills shall be attended at all
					 times.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart F - Drilling and Rotary Jet Piercing › Section 57.7013 - Covering or guarding drill holes

Current through July 13, 2024
Drill holes large enough to constitute a hazard shall be
					 covered or guarded.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart F - Drilling and Rotary Jet Piercing › Section 57.7018 - Hand clearance

Current through July 13, 2024
Persons shall not hold the drill steel while collaring
					 holes, or rest their hands on the chuck or centralizer while drilling.
Drilling-Underground Only
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart F - Drilling and Rotary Jet Piercing › Section 57.7028 - Hand clearance

Current through July 13, 2024
Persons shall not rest their hands on the chuck or
					 centralizer while drilling.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 3 - UNDERGROUND METAL/NONMETAL MINES › Subpart F - Drilling and Rotary Jet Piercing › Section 57.7032 - Anchoring

Current through July 13, 2024
Columns and the drills mounted on them shall be anchored
					 firmly before and during drilling.
Drilling-Surface and Underground