Search
Search U.S. government technical reports digitized or harvested by TRAIL.
Keyword Search
15 results returnedSearch results
- Air-sealing coal mines to reduce water pollution
- The effect of atmospheric pressures on the oxygen level in a sealed mine
- Geologic and ground-control aspects of an experimental shortwall operation in the upper Ohio Valley
- Roof rock structures and related roof support problems in the Pittsburgh coalbeds of southwestern Pennsylvania
- The geologic character of some coal wants at the Westland Mine in southwestern Pennsylvania
- Subsidence over four room-and-pillar sections in southwestern Pennsylvania
- The relation of geology to mine roof conditions in the Pocahontas No. 3 coalbed
- Geologic structures in coal mine roof
- Geologic factors in coal mine roof stability :a progress report
- Geotechnology in slate quarry operations
- Feasibility of water diversion and overburden dewatering
- Coal mine roof instability :categories and causes
- The character of five selected LANDSAT lineaments in southwestern Pennsylvania
- Hillseam geology and roof instability near outcrop in eastern Kentucky drift mines
- Leakage across a bituminous coal mine barrier
