Program Policy Manual - VOLUME V - Mine Safety and Health ...

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MSHA PROGRAM POLICY MANUAL VOLUME V 75.1720 Protective Clothing; Requirements Hard hats or hard caps are required to be worn by miners at underground coal mines in accordance with paragraph (f) of this Section. The purpose of the safety standard is to provide substantial protection for the head from falling objects and to protect miners against electrical shock or burn. Hard hats are required to be suitable for these purposes, and if they are painted, the paint base must be nonmetallic. Hard hats or caps that meet or exceed the applicable specifications of the American National Standards Institute (ANSI) provide appropriate head protection and comply with these requirements. The applicable standards are ANSI's "Safety Requirement for Industrial Head Protection," Z89.1, and "Safety Requirements for Industrial Protective Helmets for Electrical Workers, Class B," Z89.2. Hard hats or caps that do not meet or exceed the applicable ANSI or equivalent standards should not be used. Plastic "baseballtype" caps and thin plastic hats do not have adequate suspension systems and are not constructed of sufficiently substantial material to afford the necessary protection from impact and penetration of falling objects. Hats or caps constructed of metal materials create an additional hazard of electrical shock or burn because they are conductive. The phrase "when other hazards to the eyes exist from flying particles" is interpreted to mean that face shields or goggles shall be worn by miners when performing work such as breaking material with a hammer, digging with a pick, tightening a roof support with an axe or hammer, sounding roof, riding in or on haulage equipment (except closed-type equipment such as covered man cars), and any other work considered hazardous to the miners' eyes. Paragraph (c) of this Section requires that miners wear gloves whenever they troubleshoot or test energized electric power circuits or electric equipment. Work gloves in good condition are acceptable for troubleshooting or testing energized low- and medium-voltage circuits or equipment. 75.1722 Mechanical Equipment Guards Guards installed to prevent contact with moving parts of machinery shall: 1. Be of substantial construction; 2. Be of such construction that openings in the guard are too small to admit a person's hand; February 2003 (Release V-33) 156
MSHA PROGRAM POLICY MANUAL VOLUME V 3. Be firmly bolted or otherwise installed in a stationary position; and 4. Be of sufficient size to enclose the moving parts and exclude the possibility of any part of a person's body from contacting the moving parts while such equipment is in motion. Guards designed to prevent contact with ventilating fans having exposed blades shall completely enclose the outby side of the fan blades. Guards, such as substantial chains, cables, or the equivalent, installed to protect persons from contact with the inby side of ventilating fans shall: 1. Be located at least 6 feet on the inby side of the fan blade; 2. Be installed to a height of at least one-half the height of the air passageway; and 3. Extend the width of the air passageway. Inspectors should carefully examine each belt conveyor drive to determine whether all rollers are sufficiently guarded to prevent persons from becoming entangled between the rollers and the conveyor belt. 75.1723 Stationary Grinding Machines; Protective Devices Face shields or goggles shall be worn when operating any type of grinding wheel regardless of how the wheel is guarded. 75.1724 Hand-Held Power Tools; Safety Devices If a hand-held power tool is equipped with a friction device in lieu of a switch which requires constant pressure to keep the tool operating, the friction device shall be adjusted to readily slip in case of emergency. 75.1725 Machinery and Equipment; Operation and Maintenance The presence of defects, such as worn tires, defective steering or brakes, malfunctioning hydraulic controls, worn lagging on belt conveyor drive rollers, or frozen or damaged idler rollers could indicate that such machinery and equipment is not maintained in safe operating condition. Therefore, a violation of this section would exist if such defects render the equipment or machinery unsafe to operate. When an inspector finds a violation as described above, he shall issue a citation requiring the condition to be corrected in reasonable time. Since this Section also requires that unsafe equipment or machinery be removed from service immediately, the February 2003 (Release V-33) 157
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