longhole
2.Application of High Bench Large Diameter Longhole Blasting Technology in Anqing Copper Mine
3.STUDY ON STABILITY OF STOPE IN ROOM HIGH-LEVEL LARGE-DIAMETER LONGHOLE MINING IN ANQING COPPER MINE
5.This paper briefly intro-duced the practice of longhole blast shaft-formirg method for blind shaft sinking in Tongshan Copper Mine.
6.In combination with the blasting practice at Nanfen Open pit Iron Mine,research was made on utilizing advanced testing instrument in the main adit to supervise the open pit longhole blasting. The related data of adit blasting vibration were analyzed sysmatically and a blasting vibration formula suitable for the geological conditions of the mine was given so as to provide the mine blasting design with scientific basis.
7.Based on the results of vertical static loading test and stress test for longhole bored pile in loess foundation, by analysing the transferring law of axial force and the action of lateral friction resistance and bottom resistance, the paper discusses the influences of two types of holing technology on bearing capacity behavior.
8.The M - 700 type extracting coalbed methane drill rig is a major substance ofLonghole Drilling in Collier>which is a new project of science and technical research in 1997. This thesis introduces briefly the structures, test situations and main technical parameters of the drill rig.
