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在我矿井下平巷掘进施工中,有的中段采用手持钻机凿岩,有的中段是采用双机液压台车打眼。两种方式各有利弊。为了发挥机械化作业线在平巷掘进中的优势,从1980年4月至9月,我们在230和270中段组织了平巷掘进中深孔凿岩爆破试验,共98面炮,进尺为161.7米,取得了良好的效果:平均眼深为1.82米,最深为2.28米,平均进尺1.65米,最高为2.2米,比230中段手持钻机平均进尺1.1米,提高了50％;爆破率平均为
In my underground mine tunneling construction, some use of hand-held drilling rig rock drilling, and some middle is the use of dual-hydraulic drilling car drilling. Both ways have their pros and cons. In order to give full play to the advantage of the mechanized operation line in roadway driving, from April to September 1980, we conducted a deep hole drilling blasting test in the middle of sections 230 and 270 with a total of 98 face guns with a footage of 161.7 meters , And achieved good results: the average depth of eye is 1.82 meters, the deepest is 2.28 meters, the average footage of 1.65 meters, the maximum of 2.2 meters, 230 meters than the average mid-range handheld jack 1.1 meters, an increase of 50%; blasting average of