Roof Bolters, Mining

Operate machinery to install roof support bolts in underground mine.

Job Task

• Drill bolt holes into roofs at specified distances from ribs or adjacent bolts.
• Force bolts into holes, using hydraulic mechanisms of self-propelled bolting machines.
• Install truss bolts traversing entire ceiling spans.
• Position bolting machines, and insert drill bits into chucks.
• Position safety jacks to support underground mine roofs until bolts can be installed.
• Remove drill bits from chucks after drilling holes, then insert bolts into chucks.
• Rotate chucks to turn bolts and open expansion heads against rock formations.
• Test bolts for specified tension, using torque wrenches.
• Tighten ends of anchored truss bolts, using turnbuckles.

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