Wyoming Administrative Code › Agency 053 - Workforce Services, Department of › Sub-Agency 0004 - Mining Inspector › Chapter 4 - UNDERGROUND COAL MINES › Subpart A - General › Section 75.2 - Definitions

Current through July 13, 2024
The following definitions apply in this part.
Act. The Federal Mine Safety and Health Act of 1977.
Active workings. Any place in a coal mine where miners are
					 normally required to work or travel.
Anthracite. Coals with a volatile ratio equal to 0.12 or
					 less. The volatile ratio is the volatile matter content divided by the volatile
					 matter plus the fixed carbon.
Certified or registered. As applied to any person, a person
					 certified or registered by the State in which the coal mine is located to
					 perform duties prescribed by this part 75, except that in a State where no
					 program of certification or registration is provided or where the program does
					 not meet at least minimum Federal standards established by the Secretary, such
					 certification or registration shall be by the Secretary.
Coal mine. Includes areas of adjoining mines connected
					 underground.
Low voltage. Up to and including 660 volts, medium voltage
					 means voltages from 661 to 1,000 volts; and high voltage means more than 1,000
					 volts.
Permissible.
(1)
				  As applied to electric face equipment, all electrically operated equipment
				  taken into or used in by the last open crosscut of an entry or a room of any
				  coal mine the electrical parts of which, including, but not limited to,
				  associated electrical equipment, components, and accessories, are designed,
				  constructed, and installed, in accordance with the specifications of the
				  Secretary, to assure that such equipment will not cause a mine explosion or
				  mine fire, and the other features of which are designed and constructed, in
				  accordance with the specifications of the Secretary, to prevent, to the
				  greatest extent possible, other accidents in the use of such equipment. The
				  regulations of the Secretary or the Director of the Bureau of Mines in effect
				  on March 30, 1970, relating to the requirements for investigation, testing,
				  approval, certification, and acceptance of such equipment as permissible shall
				  continue in effect until modified or superseded by the Secretary, except that
				  the Secretary shall provide procedures, including, where feasible, testing,
				  approval, certification, and acceptance in the field by an authorized
				  representative of the Secretary, to facilitate compliance by an operator with
				  the requirements of S 75.500 within the periods prescribed in S
				  75.500.
(2) As applied to equipment
				  other than permissible electric face equipment:
(i) Equipment used in the operation of a coal
				  mine to which an approval plate, label, or other device is attached as
				  authorized by the Secretary and which meets specifications which are prescribed
				  by the Secretary for the construction and maintenance of such equipment and are
				  designed to assure that such equipment will not cause a mine explosion or a
				  mine fire.
(ii) The manner of use
				  of equipment means the manner of use prescribed by the Secretary.
Qualified person. As the context requires:
(1) An individual deemed qualified by the
				  Secretary and designated by the operator to make tests and examinations
				  required by this part 75; and
(2)
				  An individual deemed, in accordance with minimum requirements to be established
				  by the Secretary, qualified by training, education, and experience, to perform
				  electrical work, to maintain electrical equipment, and to conduct examinations
				  and tests of all electrical equipment.
Respirable dust. Dust collected with a sampling device
					 approved by the Secretary and the Secretary of Health and Human Services in
					 accordance with part 74--Coal Mine Dust Personal Sampler Units of this title.
					 Sampling device approvals issued by the Secretary of the Interior and Secretary
					 of Health, Education, and Welfare are continued in effect.
Rock dust. Pulverized limestone, dolomite, gypsum,
					 anhydrite, shale, adobe, or other inert material, preferably light colored, 100
					 percent of which will pass through a sieve having 20 meshes per linear inch and
					 70 percent or more of which will pass through a sieve having 200 meshes per
					 linear inch; the particles of which when wetted and dried will not cohere to
					 form a cake which will not be dispersed into separate particles by a light
					 blast of air; and which does not contain more than 5 percent combustible matter
					 or more than a total of 4 percent free and combined silica (SiO2), or, where
					 the Secretary finds that such silica concentrations are not available, which
					 does not contain more than 5 percent of free and combined silica.
Secretary. The Secretary of Labor or the Secretary's
					 delegate.
State Mine Inspector means the State Mine Inspector of the
					 State of Wyoming and any Deputy State Mine Inspectors employed by the
					 Inspector.
Working face. Any place in a coal mine in which work of
					 extracting coal from its natural deposit in the earth is performed during the
					 mining cycle.
Working place. The area of a coal mine inby the last open
					 crosscut.
Working section. All areas of the coal mine from the
					 loading point of the section to and including the working faces.