Position jacks, timbers, or roof supports, and install casings, to prevent cave-ins.
Reposition machines and move controls to make additional holes or cuts.
Cut entries between rooms and haulage ways.
Observe indicator lights and gauges, and listen to machine operation to detect binding or stoppage of tools or other equipment problems.
Move planer levers to control and adjust the movement of equipment, the speed, height, and depth of cuts, and to rotate swivel cutting booms.
Cut slots along working faces of coal, salt, or other non-metal deposits to facilitate blasting, by moving levers to start the machine, and to control the vertical reciprocating drills.
Signal that machine plow blades are properly positioned, using electronic buzzers or two-way radios.
Drive mobile, truck-mounted, or track-mounted drilling or cutting machine in mines and quarries or on construction sites.
Move controls to start and position drill cutters or torches and advance tools into mines or quarry faces to complete horizontal or vertical cuts.
Advance plow blades through coal strata by remote control, according to electronic or radio signals from the tailer.