Method of fastening pipes

Method of filling subterranean voids with a particulate...

Method of inhibiting wind movement of loose particles from...

Method of mining

Method of plugging mine passages having water emanating...

Method of preventing leakage during storage of a gas or a...

Method of recovering storage volume in an underground cavern

Method of sealing off a mine passageway

Method of withdrawing hazardous gases from subterranean...

Method, apparatus, and system for transporting a slurry...

Millhole chute structure

Mine backfill process

Mine brattices

Mine door installation

Mine door power drive system

Mine door power drive system

Mine door system including an air pressure relief door

Mine door system with trigger-actuated latch mechanism

Mine fire and emergency warning stench injector

Mine refuge