Search U.S. government technical reports digitized or harvested by TRAIL.
Three coal mine gob degasification studies using surface boreholes and a bleeder system
Control of methane by ventilation of shafts during raise drilling
Building seals by pneumatic stowing in mine closure operations
Sealing openings in abandoned mines by pneumatic stowing
Long-term effectiveness of deep mine sealing at Moraine State Park, Butler County, Pa.
Quartz dust sources during overburden drilling at surface coal mines