我国从五十年代后期开始,在冶金辅助矿山——石灰石矿和镁矿使用潜孔钻机。当时由于所穿凿的矿岩比较软,钻具(冲击器和钻头)寿命问题并不十分突出。到了六十年代后期,这种钻机逐步在铁矿和有色金属矿推广,随着穿凿的矿岩的可凿性下降,钻具寿命也大幅度地下降了,冲击器和钻头的寿命只相当于外国同类型产品的10％左右,其中最低的是钻头, Since the late 1950s, China has used the DTH drilling rigs in metallurgical auxiliary mines - limestone mines and magnesium mines. At that time, the drilling tools (impactor and drill bit) life problems were not very prominent due to the soft rock worn. By the late 1960s, the drilling rig was gradually being popularized in iron and non-ferrous metal mines. With the reduction of the chisel size of the drilled ore rock, the life of the drilling tool also dropped drastically, and the life of the impactor and drill bit corresponded only to About 10% of the same type of foreign products, of which the lowest is the bit,