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地表岩溶发育、石芽溶沟溶斗遍布的石灰石矿,过去因大型钻具凿岩成孔困难,一般采用轻便凿岩机浅眼爆破或掘进峒室进行大爆破削顶,其效率低,劳动强度大,基建采准工程量大,投资多。为了满足生产需要,提高采掘速度,降低矿石成本,必须寻求一种高强度采矿方法。湖南新化水泥厂矿山为年产六十万吨的石灰石露天矿,近几年来,在岩溶型地表,进行深孔开采试验,先后用YQ—150A型潜孔钻665个炮孔,共5933米,
Surface karst development, stone sprouting ditch dissolved limestone mine, in the past because of large drill hole drilling difficulties, the general use of portable rock drill light blasting or tunneling blasting chamber for large blasting, the low efficiency, labor-intensive, Capital construction projects admitted a large amount of investment. In order to meet the needs of production, increase the speed of mining and reduce the cost of ore, we must seek a high-strength mining method. Xinhua Cement Plant in Hunan Province, with an annual output of 600,000 tons of limestone open pit mine, in recent years, in the karst surface, deep hole mining test, has used YQ-150A DTH 665 drill holes, a total of 5933 meters ,