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凡硐队平巷工程，大部为风化页岩、铁帽、砂岩，在风化砂岩中则为半风化的高岭土层，胶结粘性，软而不松。使用洋镐土锄挖掘效率不高，改用土中放炮的办法，掘进效率有所提高，但是在坚土及软岩中用三刃钎凿岩，打深眼转动钢钎困难，拔钎不易，常造成卡钎事故，增长了打眼时间，技术员和工人经过整风运动破除了迷信，解放了思想，发挥了敢想、敢说、敢干的共产主义风格，创造了螺旋形钎头打眼。
Where cave team alley project, most of the weathered shale, iron hat, sandstone, weathered sandstone in the semi-weathered kaolin layer, cementing sticky, soft and not loose. The use of picks picks hoe excavation efficiency is not high, the use of blasting in the soil approach, tunneling efficiency has improved, but in the strong soil and soft rock with three-edge drill rock drilling hard to drill hard to drill, pull brazing hard , Often resulting in brazing accidents, increased the time for drilling, technicians and workers through the rectification movement to get rid of superstition, liberated the idea, played a dare to think, dare to say, dare to do a communist style, and created a spiral drilling bit drilling.