【摘要】 采用中深孔落矿、小抵抗线大孔距爆破、三卷筒电耙耙矿回采矿房顶柱，取得了理想的效果。更多还原

【Abstract】 The long-hole Stoping method with small burden, big hole space for extracting stope floor pillar are used in this test.Otherwise,three drum hoists Were also employed to scraping the ore. It is satisfied with the test results.更多还原