· there are many different types of mining equipment, coal is most often mined miners usually wear hardhats that are equipped with an electric light.
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Get Price· although this equipment has been used in underground coal mines since the late 1990s, mine operators must submit a petition for modification to use it. since 1997, msha has granted 52 pfms with specific conditions to allow mine operators to use high voltage continuous mining machines underground. currently,
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Get Pricethe only other machinery used were an electric cutter to undercut the coal face and electric drills for blasting to drop the face. once dropped, manual labor was used to load coal onto the conveyor parallel to the face and to place wooden roof props to control the fall of the roof. such low technology longwall mines continued in operation into the
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Get Pricelaws governing the mining of coal unofficial text of 805 kar chapter 2 2 section 3. in mines using diesel powered equipment the quantity of ventilating air must meet the following standards: (1) in addition to the amount of air required by the kentucky mining law, at least 6,000 cubic feet of air per minute
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