我队在井冲铅锌铜矿区施工,遇到上百米厚的硅质岩,岩石结构致密、质地坚硬、可钻性10～12级,但研磨性小,用孕镶金刚石钻头钻进易打滑,以致丧失自磨出刃的能力。下面谈谈我们是怎样解决这个问题的。一改善胎体适应性起初,我们使用郑州探矿厂生产的表镶天然金刚石钻头,在混合岩中钻进效果尚好。但钻进到硅质岩及伟晶钾长石层,效率 I team in the red lead-zinc-copper mine construction, met hundreds of thick siliceous rocks, rock compact structure, hard texture, drillability of 10 to 12, but grinding is small, with diamond impregnated diamond drill Easy to slip, resulting in the loss of ability to wear out of blade. Let’s talk about how we solved this problem. First, to improve the carcass adaptability At first, we use the table inlaid natural diamond drill production plant in Zhengzhou, drilling in the mixed rock is still good. But drilling into the silicalite and pegmatite layer, efficiency