Mining Roof Bolters

<ul><li>Drill bolt holes into roofs at specified distances from ribs or adjacent bolts.</li><li>Pull down loose rock that cannot be supported.</li><li>Position bolting machines, and insert drill bits into chucks.</li><li>Force bolts into holes, using hydraulic mechanisms of self-propelled bolting machines.</li><li>Perform safety checks on equipment before operating.</li><li>Perform tests to determine if methane gas is present.</li><li>Perform ventilation tasks, such as hanging ventilation curtains and tubes.</li><li>Dust rocks after bolting.</li><li>Install various types of bolts including truss, glue, and resin bolts, traversing entire ceiling spans.</li><li>Drill test holes and test bolts for specified tension, using torque wrenches.</li><li>Position safety jacks to support underground mine roofs until bolts can be installed.</li><li>Rotate chucks to turn bolts and open expansion heads against rock formations.</li><li>Remove drill bits from chucks after drilling holes and insert bolts into chucks.</li><li>Tighten ends of anchored truss bolts, using turnbuckles.</li></ul>