Search U.S. government technical reports digitized or harvested by TRAIL.
Anchorage testing of mine-roof bolts.
Anchorage testing of mine-roof bolts.
Survey of practices in controlling roof at intersections and junctions in underground coal mines
Evaluation of ultrasonic measurement systems for bolt load determinations
Evaluation of pulsed-phase-lock-loop technology applied to mine roof bolt load measurement
Field verification of load transfer mechanics of fully grouted roof bolts
Field evaluation of cable bolt supports, Homestake Mine, Lead, SD