drift mining
5.STUDY ON SEDIMENTATION CHARACTERISTICS AND STRENGTH DISTRIBUTION OF FILL IN DRIFT CUT AND FILL MINING
8.By systematic monitoring the stress-strain pattern of bottom drifts using JXH-2 concretestrain-wire gage, the stress-strain relation in slusher drifts was revealed, and it was foundthat there are two most dangerous periods of drift support during block caving mining,whichprovides a practical basis for ground control and monitoring in a block caving system.
9.Practice of 43 regular operation cycles in atransportation drift at Maiiliang Mine of Datong Mining Bureau shows thatin the sandstone( f=6～8 ) drift(driving section 12.39m￣2)using the new tech-nology of directional fracture blasting triangular compound cutting and me-dium-length bole blasting can give good blasting effect under the conditionof tbe existing air-leg rock drills, scraper rock loaders and mine-car trans-portation.
