Search U.S. government technical reports digitized or harvested by TRAIL.
Relative pressure changes in coal pillars during extraction :a progress report
Causes and prevention of transportation accidents in bituminous coal mines
Safety aspects of longwall mining in the Illinois coal basin
Remedial and strata replacement techniques on longwall faces :a report on the state of the art
Longwall roof support technology in the eighties :a state-of-the-art report