Probe of reducing top coal loss by using of cutting top coal first fall interval 减少顶煤初垮步距降低煤损的探讨
2.
Xinji no . 3 coal mine is a steep mine . it has reached pre - results by isolating the pillar with loosen blast technology in recovery area . the recovery rate is lifted and coal loss is reduced . it is an example for the same mine 新集三矿属急倾斜矿井，在回收区段隔离煤柱中应用松动爆破技术，达到了预期效果，提高了采区回采率，减少了煤炭损失，并为同类型矿井提供了经验。
