我队隆文矿区大部分是Ⅳ-Ⅵ级大理岩,其中还夹杂着石英脉,软硬不均,再加岩层较破碎,因此有许多可用合金钻的岩石,常常由于合金崩掉,合金钻头消耗太多(钻头进尺约1米)不能用合金钻进,但如用钻粒钻头钻进,效率更低,因而在队党委号召下,全队在四月份展开了以革新钻头为中心的技术革命革新运动,至六月中旬就制成了“45°斜角反镶合金钻头(如图)”。 Most of my team’s Longwen mine is Ⅳ-Ⅵ marble, which is also mixed with quartz veins, soft and hard, and the rock is more broken, so there are many available alloy rock, often because the alloy collapse, the alloy drill consumption Too much (about 1 meter drill) can not be alloyed, but drilling with drill bits is less efficient and the team is calling for a technological revolution centered on revolutionary drill bits in April Revolutionary movement, made by mid-June “45 ° bevel anti-alloy drill bits (pictured).”