reglab/statecodes huggingface dataset:
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.313 - Main mine fan stoppage with person underground

Current through July 13, 2024
(a) If a
				  main mine fan stops while anyone is underground and the ventilating quantity
				  provided by the fan is not maintained by a back-up fan system-
(1) Electrically powered equipment in each
				  working section shall be deenergized;
(2) Other mechanized equipment in each
				  working section shall be shut off; and
(3) Everyone shall be withdrawn from the
				  working sections and areas where mechanized mining equipment is being installed
				  or removed.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.320 - Air quality detector and measurement devices

Current through July 13, 2024
(a) Tests
				  for methane shall be made by a qualified person with MSHA approved detectors
				  that are maintained in permissible and proper operating condition and
				  calibrated with a known methane-air mixture at least once every 31
				  days.
(b) Tests for oxygen
				  deficiency shall be made by a qualified person with MSHA approved oxygen
				  detectors that are maintained in permissible and proper operating condition and
				  that can detect 19.5 percent oxygen with an accuracy of <plus-minus>0.5
				  percent. The oxygen detectors shall be calibrated at the start of each shift
				  that the detectors will be used.
(c) Handheld devices that contain electrical
				  components and that are used for measuring air velocity, carbon monoxide,
				  oxides of nitrogen, and other gases shall be approved and maintained in
				  permissible and proper operating condition.
(d) An oxygen detector approved by MSHA shall
				  be used to make tests for oxygen deficiency required by the regulations in this
				  part. Permissible flame safety lamps may only be used as a supplementary
				  testing device.
(e) Maintenance of
				  instruments required by paragraphs (a) through (d) of this section shall be
				  done by persons trained in such maintenance.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.321 - Air quality

Current through July 13, 2024
(a)
(1) The air in areas where persons work or
				  travel, except as specified in paragraph (a)(2) of this section, shallt contain
				  at least 19.5 percent oxygen and not more than 0.5 percent carbon dioxide, and
				  the volume and velocity of the air current in these areas shall be sufficient
				  to dilute, render harmless, and carry away flammable, explosive, noxious, and
				  harmful gases, dusts, smoke, and fumes.
(2) The air in areas of bleeder entries and
				  worked-out areas where persons work or travel shall contain at least 19.5
				  percent oxygen, and carbon dioxide levels shall not exceed 0.5 percent time
				  weighted average and 3.0 percent short term exposure limit.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.322 - Harmful quantities of noxious gases

Current through July 13, 2024
Concentrations of noxious or poisonous gases, other than
					 carbon dioxide, shall not exceed the threshold limit values (TLV) as specified
					 and applied by the American Conference of Governmental Industrial Hygienists in
					 -Threshold Limit Values for Substance in Workroom Air- (1972). Detectors or
					 laboratory analysis of mine air samples shall be used to determine the
					 concentrations of harmful, noxious, or poisonous gases. This incorporation by
					 reference has been approved by the Director of the Federal Register in
					 accordance with
					 5
					 U.S.C. 552(a) and 1 CFR Part
					 51. Copies are available from the Mine Safety and Health Administration,
					 Department of Labor, 4015 Wilson Boulevard, Arlington, VA 22203 and at every
					 Coal Mine Health and Safety District and Subdistrict Office. The material is
					 available for examination at the Office of the Federal Register, 800 N. Capitol
					 Street, NW., 7th Floor, Suite 700, Washington, D.C. 20408
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.323 - Action for excessive methane

Current through July 13, 2024
(a) Location of
				  tests. Tests for methane concentrations under this section shall be made at
				  least 12 inches from the roof, face, ribs, and floor.
(b) Working places and intake air courses.
(1) When 1.0 percent or more methane is
				  present in a working place or an intake air course, including an air course in
				  which a belt conveyor is located, or in an area where mechanized mining
				  equipment is being installed or removed-
(i)
				  Except intrinsically safe atmospheric monitoring systems (AMS), electrically
				  powered equipment in the affected area shall be deenergized, and other
				  mechanized equipment shall be shut off;
(ii) Changes or adjustments shall be made at
				  once to the ventilation system to reduce the concentration of methane to less
				  than 1.0 percent; and
(iii) No
				  other work shall be permitted in the affected area until the methane
				  concentration is less than 1.0 percent.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.324 - Intentional change in the ventilation system

Current through July 13, 2024
(a) A
				  person designated by the operator shall supervise any intentional change in
				  ventilation that-
(1) Alters the main air
				  current or any split of the main air current in a manner that could materially
				  affect the safety or health of persons in the mine; or
(2) Affects section ventilation by 9,000
				  cubic feet per minute of air or more in bituminous or lignite mines, or 5,000
				  cubic feet per minute of air or more in anthracite mines.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.325 - Air quantity

Current through July 13, 2024
(a)
(1) In bituminous and lignite mines the
				  quantity of air shall be at least 3,000 cubic feet per minute reaching each
				  working face where coal is being cut, mined, drilled for blasting, or loaded.
				  When a greater quantity is necessary to dilute, render harmless, and carry away
				  flammable, explosive, noxious, and harmful gases, dusts, smoke, and fumes, this
				  quantity shall be specified in the approved ventilation plan. A minimum air
				  quantity may be required to be specified in the approved ventilation plan for
				  other working places or working faces.
(2) The quantity of air reaching the working
				  face shall be determined at or near the face end of the line curtain,
				  ventilation tubing, or other ventilation control device. If the curtain,
				  tubing, or device extends beyond the last row of permanent roof supports, the
				  quantity of air reaching the working face shall be determined behind the line
				  curtain or in the ventilation tubing at or near the last row of permanent
				  supports.
(3) If machine mounted
				  dust collectors or diffuser fans are used, the approved ventilation plan shall
				  specify the operating volume of the dust collector or diffuser fan.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.326 - Mean entry air velocity

Current through July 13, 2024
In exhausting face ventilation systems, the mean entry air
					 velocity shall be at least 60 feet per minute reaching each working face where
					 coal is being cut, mined, drilled for blasting, or loaded, and to any other
					 working places as required in the approved ventilation plan. A lower mean entry
					 air velocity may be approved in the ventilation plan if the lower velocity will
					 maintain methane and respirable dust concentrations in accordance with the
					 applicable levels. Mean entry air velocity shall be determined at or near the
					 inby end of the line curtain, ventilation tubing, or other face ventilation
					 control devices.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.327 - Air course and trolley haulage systems

Current through July 13, 2024
(a) In any mine
				  opened on or after March 30, 1970, or in any new working section of a mine
				  opened before that date, where trolley haulage systems are maintained and where
				  trolley wires or trolley feeder wires are installed, an authorized
				  representative of the Secretary shall require enough entries or rooms as intake
				  air courses to limit the velocity of air currents in the haulageways to
				  minimize the hazards of fires and dust explosions in the haulageways.
(b) Unless the district manager approves a
				  higher velocity, the velocity of the air current in the trolley haulage entries
				  shall be limited to not more than 250 feet per minute. A higher air velocity
				  may be required to limit the methane content in these haulage entries or
				  elsewhere in the mine to less than 1.0 percent and provide an adequate supply
				  of oxygen.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.330 - Face ventilation control devices

Current through July 13, 2024
(a) Brattice cloth,
				  ventilation tubing and other face ventilation control devices shall be made of
				  flame-resistant material approved by MSHA.
(b)
(1)
				  Ventilation control devices shall be used to provide ventilation to dilute,
				  render harmless, and to carry away flammable, explosive, noxious, and harmful
				  gases, dusts, smoke, and fumes-
(i) To each
				  working face from which coal is being cut, mined, drilled for blasting, or
				  loaded; and
(ii) To any other
				  working places as required by the approved ventilation plan.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.331 - Auxiliary fan and tubing

Current through July 13, 2024
(a) When auxiliary
				  fans and tubing are used for face ventilation, each auxiliary fan shall be-
(1) Permissible, if the fan is electrically
				  operated;
(2) Maintained in proper
				  operating condition;
(3)
				  Deenergized or shut off when no one is present on the working section;
				  and
(4) Located and operated to
				  avoid recirculation of air.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.332 - Working section and working places

Current through July 13, 2024
(a)
(1) Each working section and each area where
				  mechanized mining equipment is being installed or removed, shall be ventilated
				  by a separate split of intake air directed by overcasts, undercasts or other
				  permanent ventilation controls.
(2)
				  When two or more sets of mining equipment are simultaneously engaged in
				  cutting, mining, or loading coal or rock from working places within the same
				  working section, each set of mining equipment shall be on a separate split of
				  intake air.
(3) For purposes of
				  this section, a set of mining equipment includes a single loading machine, a
				  single continuous mining machine, or a single longwall or shortwall mining
				  machine.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.333 - Ventilation controls

Current through July 13, 2024
(a) For purposes of
				  this section, -doors- include any door frames.
(b) Permanent stoppings or other permanent
				  ventilation control devices constructed after November 15, 1992, shall be built
				  and maintained-
(1) Between intake and return
				  air courses, except temporary controls may be used in rooms that are 600 feet
				  or less from the centerline of the entry from which the room was developed
				  including where continuous face haulage systems are used in such rooms. Unless
				  otherwise approved in the ventilation plan, these stoppings or controls shall
				  be maintained to and including the third connecting crosscut outby the working
				  face;
(2) To separate belt conveyor
				  haulageways from return air courses, except where belt entries in areas of
				  mines developed before March 30, 1970, are used as return air
				  courses;
(3) To separate belt
				  conveyor haulageways from intake air courses when the air in the intake air
				  courses is used to provide air to active working places. Temporary ventilation
				  controls may be used in rooms that are 600 feet or less from the centerline of
				  the entry from which the rooms were developed including where continuous face
				  haulage systems are used in such rooms. When continuous face haulage systems
				  are used, permanent stoppings or other permanent ventilation control devices
				  shall be built and maintained to the outby most point of travel of the dolly or
				  600 feet from the point of deepest penetration in the conveyor belt entry,
				  whichever distance is closer to the point of deepest penetration, to separate
				  the continuous haulage entry from the intake entries;
(4) To separate the primary escapeway from
				  belt and trolley haulage entries, as required by 75.380(g). For the purposes of
				  75.380(g), the loading point for a continuous haulage system shall be the outby
				  most point of travel of the dolly or 600 feet from the point of deepest
				  penetration, whichever distance is less; and
(5) In return air courses to direct air into
				  adjacent worked-out areas.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.334 - Worked-out area and area where pillar are being recovered

Current through July 13, 2024
(a) Worked-out areas where no pillars have
				  been recovered shall be-
(1) Ventilated so
				  that methane-air mixtures and other gases, dusts, and fumes from throughout the
				  worked-out areas are continuously diluted and routed into a return air course
				  or to the surface of the mine; or
(2) Sealed.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.335 - Construction of seals

Current through July 13, 2024
(a)
(1) Each seal constructed after November 15,
				  1992, shall be -
(i) Constructed of solid
				  concrete blocks at least 6 by 8 by 16 inches, laid in a transverse pattern with
				  mortar between all joints;
(ii)
				  Hitched into solid ribs to a depth of at least 4 inches and hitched at least 4
				  inches into the floor;
(iii) At
				  least 16 inches thick. When the thickness of the seal is less than 24 inches
				  and the width is greater than 16 feet or the height is greater than 10 feet, a
				  pilaster shall be interlocked near the center of the seal. The pilaster shall
				  be at least 16 inches by 32 inches; and
(iv) Coated on all accessible surfaces with
				  flame-retardant material that will minimize leakage and that has a flame-spread
				  index of 25 or less, as tested under ASTM E162-87, -Standard Test Method for
				  Surface Flammability of Materials Using a Radiant Heat Energy Source.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.340 - Underground electrical installations

Current through July 13, 2024
(a) Underground
				  transformer stations, battery charging stations, substations, rectifiers, and
				  water pumps shall be housed in noncombustible structures or areas or be
				  equipped with a fire suppression system meeting the requirements of 75.1107-3
				  through 75.1107-16.
(1) When a noncombustible
				  structure or area is used, these installations shall be-
(i) Ventilated with intake air that is
				  coursed into a return air course or to the surface and that is not used to
				  ventilate working places; or
(ii)
				  Ventilated with intake air that is monitored for carbon monoxide or smoke by an
				  AMS installed and operated according to 75.351. Monitoring of intake air
				  ventilating battery charging stations shall be done with sensors not affected
				  by hydrogen; or
(iii) Ventilated
				  with intake air and equipped with sensors to monitor for heat and for carbon
				  monoxide or smoke. Monitoring of intake air ventilating battery charging
				  stations shall be done with sensors not affected by hydrogen. The sensors shall
				  deenergize power to the installation, activate a visual and audible alarm
				  located outside of and on the intake side of the enclosure, and activate doors
				  that will automatically close when either of the following occurs:
(A) The temperature in the noncombustible
				  structure reaches 165 deg.F; or
(B)
				  The carbon monoxide concentration reaches 10 parts per million above the
				  ambient level for the area, or the optical density of smoke reaches 0.022 per
				  meter. At least every 31 days, sensors installed to monitor for carbon monoxide
				  shall be calibrated with a known concentration of carbon monoxide and air
				  sufficient to activate the closing door, or each smoke sensor shall be tested
				  to determine that it functions correctly.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.341 - Direct-fired intake air heaters

Current through July 13, 2024
(a) If any system
				  used to heat intake air malfunctions, the heaters affected shall switch off
				  automatically.
(b) Thermal overload
				  devices shall protect the blower motor from overheating.
(c) The fuel supply shall turn off
				  automatically if a flame-out occurs.
(d) Each heater shall be located or guarded
				  to prevent contact by persons and shall be equipped with a screen at the inlet
				  to prevent combustible materials from passing over the burner units.
(e) If intake air heaters use liquefied fuel
				  systems-
(1) Hydrostatic relief valves
				  installed on vaporizers and on storage tanks shall be vented; and
(2) Fuel storage tanks shall be located or
				  protected to prevent fuel from leaking into the mine.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.342 - Methane monitors

Current through July 13, 2024
(a)
(1) MSHA approved methane monitors shall be
				  installed on all face cutting machines, continuous miners, longwall face
				  equipment, loading machines, and other mechanized equipment used to extract or
				  load coal within the working place.
(2) The sensing device for methane monitors
				  on longwall shearing machines shall be installed at the return air end of the
				  longwall face. An additional sensing device also shall be installed on the
				  longwall shearing machine, downwind and as close to the cutting head as
				  practicable. An alternative location or locations for the sensing device
				  required on the longwall shearing machine may be approved in the ventilation
				  plan.
(3) The sensing devices of
				  methane monitors shall be installed as close to the working face as
				  practicable.
(4) Methane monitors
				  shall be maintained in permissible and proper operating condition and shall be
				  calibrated with a known air-methane mixture at least once every 31 days. To
				  assure that methane monitors are properly maintained and calibrated, the
				  operator shall:
(i) Use persons properly
				  trained in the maintenance, calibration, and permissibility of methane monitors
				  to calibrate and maintain the devices.
(ii) Maintain a record of all calibration
				  tests of methane monitors. Records shall be maintained in a secure book that is
				  not susceptible to alteration or electronically in a computer system so as to
				  be secure and not susceptible to alteration.
(iii) Retain the record of calibration tests
				  for 1 year from the date of the test. Records shall be retained at a surface
				  location at the mine and made available for inspection by authorized
				  representatives of the Secretary, the State Mine Inspector and the
				  representative of miners.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.343 - Underground shops

Current through July 13, 2024
(a) Underground
				  shops shall be equipped with an automatic fire suppression system meeting the
				  requirements of 75.1107-3 through 75.1107-16, or be enclosed in a
				  noncombustible structure or area.
(b) Underground shops shall be ventilated
				  with intake air that is coursed directly into a return air course.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.344 - Compressors

Current through July 13, 2024
(a) Except compressors that are components of
				  equipment such as locomotives and rock dusting machines and compressors of less
				  than 5 horsepower, electrical compressors including those that may start
				  automatically shall be: Continuously attended by a person designated by the
				  operator who can see the compressor at all times during its operation. Any
				  designated person attending the compressor shall be capable of activating the
				  fire suppression system and deenergizing or shutting-off the compressor in the
				  event of a fire; or,
(2) Enclosed in a
				  noncombustible structure or area which is ventilated by intake air coursed
				  directly into a return air course or to the surface and equipped with sensors
				  to monitor for heat and for carbon monoxide or smoke. The sensors shall
				  deenergize power to the compressor, activate a visual and audible alarm located
				  outside of and on the intake side of the enclosure, and activate doors to
				  automatically enclose the noncombustible structure or area when either of the
				  following occurs:
(i) The temperature in the
				  noncombustible structure or area reaches 165 deg.F.
(ii) The carbon monoxide concentration
				  reaches 10 parts per million above the ambient level for the area, or the
				  optical density of smoke reaches 0.05 per meter. At least once every 31 days,
				  sensors installed to monitor for carbon monoxide shall be calibrated with a
				  known concentration of carbon monoxide and air sufficient to activate the
				  closing door, and each smoke sensor shall be tested to determine that it
				  functions correctly.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.350 - Air course and belt haulage entries

Current through July 13, 2024
In any coal mine opened after March 30, 1970, the entries
					 used as intake and return air courses shall be separated from belt haulage
					 entries, and each operator of such mine shall limit the velocity of the air
					 coursed through belt haulage entries to the amount necessary to provide an
					 adequate supply of oxygen in such entries, and to insure that the air therein
					 shall contain less than 1.0 volume per centum of methane, and such air shall
					 not be used to ventilate active working places. Whenever an authorized
					 representative of the Secretary finds, in the case of any coal mine opened on
					 or prior to March 30, 1970, that has been developed with more than two entries,
					 that the conditions in the entries, other than belt haulage entries, are such
					 as to permit adequately the coursing of intake or return air through such
					 entries:
(a) The belt haulage entries
				  shall not be used to ventilate, unless such entries are necessary to ventilate,
				  active working places, and
(b) When
				  the belt haulage entries are not necessary to ventilate the active working
				  places, the operator of such mine shall limit the velocity of the air coursed
				  through the belt haulage entries to the amount necessary to provide an adequate
				  supply of oxygen in such entries, and to assure that air therein shall contain
				  less than 1.0 volume per centum of methane.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.351 - Atmospheric monitoring system (AMS)

Current through July 13, 2024
(a) Minimum
				  requirements. An AMS shall consist of sensors to monitor the mine atmosphere
				  and instruments at a surface location designated by the operator to receive
				  information from the monitoring sensors. Each AMS installed in accordance with
				  Secs. 75.323(d)(1)(ii), 75.340(a)(2) and 75.362(f) shall do the following:
(1) Monitor for circuit continuity and sensor
				  function, and identify at the designated surface location any activated or
				  malfunctioning sensor.
(2) Signal a
				  designated surface location at the mine when any interruption of circuit
				  continuity occurs or any sensor malfunctions.
(3) Signal affected working sections and the
				  designated surface location when-
(i) The
				  carbon monoxide concentration at any carbon monoxide sensor reaches 5 parts per
				  million above the established ambient level for that area; or
(ii) The methane concentration at any methane
				  monitoring station exceeds the maximum allowable concentration as specified for
				  that location in 75.323.
(4) Activate alarms at a designated surface
				  location and affected working sections when the carbon monoxide concentration
				  at any carbon monoxide sensor reaches 10 parts per million above the
				  established ambient level for the area or when the optical density of smoke at
				  any smoke sensor reaches 0.05 per meter.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.360 - Preshift examination

Current through July 13, 2024
(a)
(1) Except as provided in paragraph (a)(2) of
				  this section, a certified person designated by the operator shall make a
				  preshift examination within 3 hours preceding the beginning of any 8-hour
				  interval during which any person is scheduled to work or travel underground.
				  The operator shall establish the 8hour intervals of time subject to the
				  required preshift examinations. No person other than certified examiners may
				  enter or remain in any underground area unless a preshift examination has been
				  completed for the established 8-hour period.
(2) Preshift examinations of areas where
				  pumpers are scheduled to work or travel shall not be required prior to the
				  pumper entering the areas if the pumper is a certified person and the pumper
				  conducts an examination for hazardous conditions, tests for methane and oxygen
				  deficiency and determines if the air is moving in its proper direction in the
				  area where the pumper works or travels. The examination of the area must be
				  completed before the pumper performs any other work. A record of all hazardous
				  conditions found by the pumper shall be made and retained in accordance with
				  75.363.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.361 - Supplemental examination

Current through July 13, 2024
(a) Except for
				  certified persons conducting examinations required by this subpart, within 3
				  hours before anyone enters an area in which a preshift examination has not been
				  made for that shift, a certified person shall examine the area for hazardous
				  conditions, determine whether the air is traveling in its proper direction and
				  at its normal volume, and test for methane and oxygen deficiency.
(b) Certification. At each working place
				  examined, the person making the supplemental examination shall certify by
				  initials, date, and the time, that the examination was made. In areas required
				  to be examined outby a working section, the certified person shall certify by
				  initials, date, and the time at enough locations to show that the entire area
				  has been examined.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.362 - On-shift examination

Current through July 13, 2024
(a)
(1) At least once during each shift, or more
				  often if necessary for safety, a certified person designated by the operator
				  shall conduct an on-shift examination of each section where anyone is assigned
				  to work during the shift and any area where mechanized mining equipment is
				  being installed or removed during the shift. The certified person shall check
				  for hazardous conditions, test for methane and oxygen deficiency, and determine
				  if the air is moving in its proper direction.
(2) A person designated by the operator shall
				  conduct an examination to assure compliance with the respirable dust control
				  parameters specified in the mine ventilation plan. In those instances when a
				  shift change is accomplished without an interruption in production on a
				  section, the examination shall be made anytime within 1 hour of the shift
				  change. In those instances when there is an interruption in production during
				  the shift change, the examination shall be made before production begins on a
				  section. Deficiencies in dust controls shall be corrected before production
				  begins or resumes. The examination shall include air quantities and velocities,
				  water pressures and flow rates, excessive leakage in the water delivery system,
				  water spray numbers and orientations, section ventilation and control device
				  placement, and any other dust suppression measures required by the ventilation
				  plan. Measurements of the air velocity and quantity, water pressure and flow
				  rates are not required if continuous monitoring of these controls is used and
				  indicates that the dust controls are functioning properly.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.363 - Hazardous conditions; posting, correcting and recording

Current through July 13, 2024
(a) Any hazardous condition found by the mine
				  foreman or equivalent mine official, assistant mine foreman or equivalent mine
				  official, or other certified persons designated by the operator for the
				  purposes of conducting examinations under this subpart D, shall be posted with
				  a conspicuous danger sign where anyone entering the areas would pass. A
				  hazardous condition shall be corrected immediately or the area shall remain
				  posted until the hazardous condition is corrected. If the condition creates an
				  imminent danger, everyone except those persons referred to in section 104(c) of
				  the Act shall be withdrawn from the area affected to a safe area until the
				  hazardous condition is corrected. Only persons designated by the operator to
				  correct or evaluate the condition may enter the posted area.
(b) A record shall be made of any hazardous
				  condition found. This record shall be kept in a book maintained for this
				  purpose on the surface at the mine. The record shall be made by the completion
				  of the shift on which the hazardous condition is found and shall include the
				  nature and location of the hazardous condition and the corrective action taken.
				  This record shall not be required for shifts when no hazardous conditions are
				  found or for hazardous conditions found during the preshift or weekly
				  examinations inasmuch as these examinations have separate recordkeeping
				  requirements.
(c) The record shall
				  be made by the certified person who conducted the examination or a person
				  designated by the operator. If made by a person other than the certified
				  person, the certified person shall verify the record by initials and date by or
				  at the end of the shift for which the examination was made. Records shall be
				  countersigned by the mine foreman or equivalent mine official by the end of the
				  mine foreman's or equivalent mine official's next regularly scheduled working
				  shift. The record shall be made in a secure book that is not susceptible to
				  alteration or electronically in a computer system so as to be secure and not
				  susceptible to alteration.
(d)
				  Retention period. Records shall be retained at a surface location at the mine
				  for at least 1 year and shall be made available for inspection by authorized
				  representatives of the Secretary, the State Mine Inspector and the
				  representative of miners.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.364 - Weekly examination

Current through July 13, 2024
(a) Worked-out
				  areas.
(1) At least every 7 days, a certified
				  person shall examine unsealed worked-out areas where no pillars have been
				  recovered by traveling to the area of deepest penetration; measuring methane
				  and oxygen concentrations and air quantities and making tests to determine if
				  the air is moving in the proper direction in the area. The locations of
				  measurement points where tests and measurements will be performed shall be
				  included in the mine ventilation plan and shall be adequate in number and
				  location to assure ventilation and air quality in the area. Air quantity
				  measurements shall also be made where the air enters and leaves the worked-out
				  area. An alternative method of evaluating the ventilation of the area may be
				  approved in the ventilation plan.
(2) At least every 7 days, a certified person
				  shall evaluate the effectiveness of bleeder systems required by 75.334 as
				  follows:
(i) Measurements of methane and
				  oxygen concentrations and air quantity and a test to determine if the air is
				  moving in its proper direction shall be made where air enters the worked-out
				  area.
(ii) Measurements of methane
				  and oxygen concentrations and air quantity and a test to determine if the air
				  is moving in the proper direction shall be made immediately before the air
				  enters a return split of air.
(iii)
				  At least one entry of each set of bleeder entries used as part of a bleeder
				  system under 75.334 shall be traveled in its entirety. Measurements of methane
				  and oxygen concentrations and air quantities and a test to determine if the air
				  is moving in the proper direction shall be made at the measurement point
				  locations specified in the mine ventilation plan to determine the effectiveness
				  of the bleeder system.
(iv) In lieu
				  of the requirements of paragraphs (a)(2)(i) and (iii) of this section, an
				  alternative method of evaluation may be specified in the ventilation plan
				  provided the alternative method results in proper evaluation of the
				  effectiveness of the bleeder system.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.370 - Mine ventilation plan; contents

Current through July 13, 2024
(a)
(1) The operator shall develop and follow a
				  ventilation plan approved by the district manager. The plan shall be designed
				  to control methane and respirable dust and shall be suitable to the conditions
				  and mining system at the mine. The ventilation plan shall consist of two parts,
				  the plan content as pre-scribed in 75.371 and the ventilation map with
				  information as prescribed in 75.372. Only that portion of the map which
				  contains information required under 75.371 will be subject to approval by the
				  district manager.
(2) The proposed
				  ventilation plan and any revision to the plan shall be submitted in writing to
				  the district manager and the State Mine Inspector. When revisions to a
				  ventilation plan are proposed, only the revised pages, maps, or sketches of the
				  plan need to be submitted. When required in writing by the district manager,
				  the operator shall submit a fully revised plan by consolidating the plan and
				  all revisions in an orderly manner and by deleting all outdated material. A
				  copy of the plan and any changes shall be filed with the State Mine
				  Inspector.
(3)
(i) The mine operator shall notify the
				  representative of miners at least 5 days prior to submission of a mine
				  ventilation plan and any revision to a mine ventilation plan. If requested, the
				  mine operator shall provide a copy to the representative of miners at the time
				  of notification. In the event of a situation requiring immediate action on a
				  plan revision, notification of the revision shall be given, and if requested, a
				  copy of the revision shall be provided, to the representative of miners by the
				  operator at the time of submittal;
(ii) A copy of the proposed ventilation plan,
				  and a copy of any proposed revision, submitted for approval shall be made
				  available for inspection by the representative of miners; and
(iii) A copy of the proposed ventilation
				  plan, and a copy of any proposed revision, submitted for approval shall be
				  posted on the mine bulletin board at the time of submittal. The proposed plan
				  or proposed revision shall remain posted until it is approved, withdrawn or
				  denied.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.372 - Mine ventilation map

Current through July 13, 2024
(a)
(1) At intervals not exceeding 12 months, the
				  operator shall submit to the district manager 3 copies of an up-to-date map of
				  the mine drawn to a scale of not less than 100 nor more than 500 feet to the
				  inch. A registered engineer or a registered surveyor shall certify that the map
				  is accurate.
(2) In addition to the
				  informational requirements of this section the map may also be used to depict
				  and explain plan contents that are required in 75.371. Information shown on the
				  map to satisfy the requirements of 75.371 shall be subject to approval by the
				  district manager.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.373 - Reopening mines

Current through July 13, 2024
After a mine is abandoned or declared inactive, and before
					 it is reopened, mining operations shall not begin until MSHA has been notified
					 and has completed an inspection.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.380 - Escapeways; bituminous and lignite mines

Current through July 13, 2024
(a) Except in
				  situations addressed in 75.381, 75.385 and 75.386, at least two separate and
				  distinct travelable passageways shall be designated as escapeways and shall
				  meet the requirements of this section.
(b)
(1)
				  Escapeways shall be provided from each working section, and each area where
				  mechanized mining equipment is being installed or removed, continuous to the
				  surface escape drift opening or continuous to the escape shaft or slope
				  facilities to the surface.
(2)
				  During equipment installation, these escapeways shall begin at the projected
				  location for the section loading point. During equipment removal, they shall
				  begin at the location of the last loading point.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.381 - Escapeways; anthracite mines

Current through July 13, 2024
(a) Except as
				  provided in Secs. 75.385 and 75.386, at least two separate and distinct
				  travelable passageways shall be designated as escapeways and shall meet the
				  requirements of this section.
(b)
				  Escapeways shall be provided from each working section continuous to the
				  surface.
(c) Each escapeway shall
				  be-
(1) Maintained in a safe condition to
				  always assure passage of anyone, including disabled persons;
(2) Clearly marked to show the route of
				  travel to the surface;
(3) Provided
				  with ladders, stairways, ramps, or similar facilities where the escapeways
				  cross over obstructions; and
(4)
				  Maintained at least 4 feet wide by 5 feet high. If the pitch or thickness of
				  the coal seam does not permit these dimensions to be maintained other
				  dimensions may be approved in the ventilation plan.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.382 - Mechanical escape facilities

Current through July 13, 2024
(a) Mechanical
				  escape facilities shall be provided with overspeed, overwind, and automatic
				  stop controls.
(b) Every mechanical
				  escape facility with a platform, cage, or other device shall be equipped with
				  brakes that can stop the fully loaded platform, cage, or other
				  device.
(c) Mechanical escape
				  facilities, including automatic elevators, shall be examined weekly. The weekly
				  examination of this equipment may be conducted at the same time as a daily
				  examination required by 75.1400-3.
(1) The
				  weekly examination shall include an examination of the headgear, connections,
				  links and chains, overspeed and overwind controls, automatic stop controls, and
				  other facilities.
(2) At least once
				  each week, the hoist shall be run through one complete cycle of operation to
				  determine that it is operating properly.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.384 - Longwall and shortwall travelways

Current through July 13, 2024
(a) If longwall or
				  shortwall mining systems are used and the two designated escapeways required by
				  75.380 are located on the headgate side of the longwall or shortwall, a
				  travelway shall be provided on the tailgate side of that longwall or shortwall.
				  The travelway shall be located to follow the most direct and safe practical
				  route to a designated escapeway.
(b) The route of travel shall be clearly
				  marked.
(c) When a roof fall or
				  other blockage occurs that prevents travel in the travelway-
(1) Work shall cease on the longwall or
				  shortwall face;
(2) Miners shall be
				  withdrawn from face areas to a safe area outby the section loading point;
				  and
(3) MSHA shall be
				  notified.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.385 - Opening new mines

Current through July 13, 2024
When new mines are opened, no more than 20 miners at a time
					 shall be allowed in any mine until a connection has been made between the mine
					 openings, and these connections shall be made as soon as
					 possible.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.386 - Final mining of pillars

Current through July 13, 2024
When only one mine opening is available due to final mining
					 of pillars, no more than 20 miners at a time shall be allowed in the mine, and
					 the distance between the mine opening and working face shall not exceed 500
					 feet.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.388 - Boreholes in advance of mining

Current through July 13, 2024
(a) Boreholes shall
				  be drilled in each advancing working place when the working place approaches-
(1) To within 50 feet of any area located in
				  the mine as shown by surveys that are certified by a registered engineer or
				  registered surveyor unless the area has been preshift examined;
(2) To within 200 feet of any area located in
				  the mine not shown by surveys that are certified by a registered engineer or
				  registered surveyor unless the area has been preshift examined; or
(3) To within 200 feet of any mine workings
				  of an adjacent mine located in the same coal bed unless the mine workings have
				  been preshift examined.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart D - Ventilation › Section 75.389 - Mining into inaccessible areas

Current through July 13, 2024
(a)
(1) The operator shall develop and follow a
				  plan for mining into areas penetrated by boreholes drilled under
				  75.388.
(2) Mining shall not resume
				  into any area penetrated by boreholes until conditions in the penetrated area
				  can be determined under 75.388 and the plan for mining-through into the area
				  has been approved by the district manager.
(3) A copy of the procedures to be followed
				  shall be posted near the site of the mining-through operations and the operator
				  shall explain these procedures to all miners involved in the
				  operations.
Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart E - Combustible Material and Rock Dusting › Section 75.400 - Accumulation of combustible materials

Current through July 13, 2024
Coal dust, including float coal dust deposited on
					 rock-dusted surfaces, loose coal, and other combustible materials, shall be
					 cleaned up and not be permitted to accumulate in active workings, or on
					 diesel-powered equipment and electric equipment therein.