Search
Search U.S. government technical reports digitized or harvested by TRAIL.
Keyword Search
8 results returnedSearch results
- Kettlebottoms :their relation to mine roof and support
- Coal mine air tempering :effectiveness, design, and roof support
- Geotechnology in slate quarry operations
- The character of five selected LANDSAT lineaments in southwestern Pennsylvania
- Geologic conditions affecting coal mine ground control in the western United States
- Hillseam geology and roof instability near outcrop in eastern Kentucky drift mines
- Leakage across a bituminous coal mine barrier
- Influence of subjacent gob on longwall development mining in the Upper Kittanning Coalbed of south-central Pennsylvania
