Section R. 408.41473 - Drilling; inspection; jumbosRule 1473.
(1) Drilling equipment that is to be used during a shift shall be inspected each shift by a qualified employee. Equipment defects affecting safety shall be corrected before the equipment is used.(2) The drilling area shall be inspected for hazards before starting the drilling operation.(3) An employee shall not be allowed on a drill mast while the drill is in operation.(4) When a drill is moved from one area to another, drill steel, tools, and other equipment shall be secured, and the mast shall be placed in a safe position.(5) Drills on columns or stiff legs shall be anchored firmly before drilling is started and they shall be retightened frequently thereafter.(6) A jumbo deck more than 5 feet high shall be provided with guardrails on all open sides and on the back platform. A stair or ladder access, wide enough for 2 employees, shall be provided to a jumbo deck 10 feet or more in height.(7) A jumbo deck, ladders, and stairs shall be kept clean to prevent the hazard of slipping and tripping. The deck shall be an anti-slip type and the deck shall be secured to prevent displacement.(8) A mechanical means shall be provided for lifting drills, roof bolts, mine straps, and other unwieldy heavy material to the top deck of a jumbo more than 10 feet in height.(9) Receptacles or racks shall be provided for drill steel stored on a jumbo.(10) When a jumbo is moved, a rider shall not be allowed on the jumbo unless the employee is assisting the operator.(11) Jumbo wheels shall be chocked while an employee is working on the jumbo.(12) Before the drilling cycle is started, a warning shall be given to employees working under jumbo decks.(13) Before commencing a drilling cycle, the face and lifters shall be examined for misfires. If found, the misfired explosive shall be removed before the drilling starts. A lifter shall not be drilled through a blasted muck pile.(14) An air line that is buried in the invert shall be identified by signs posted nearby warning all employees.Mich. Admin. Code R. 408.41473