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我队曾在某矿区石英岩中，对勘探技术研究所设计，无锡钻探工具厂制造的YZ—54—Ⅱ型液动冲击器；北京钻探工具厂制造的φ66人造孕镶普通双管R81型金刚石钻头进行了试验，基本解决了该矿区石英岩地层钻进效率低的难题。现就R81型金刚石钻头使用情况简介如下。一、钻进地层石英岩：石英含量约98％，为坚硬、致密或带少量黄铁矿星点及节理，分上、下两层，厚度17～55米，可钻性11—12级。混合岩：主要成份为石英、长石等，较完整，可钻性10～11级。
My team had a quartzite in a mining area, the Institute of Exploration Technology Design, Wuxi drilling tools factory YZ-54-Ⅱ-type hydraulic impactor; Beijing drilling tool factory manufacturing φ66 artificial inlaid ordinary double R81-type diamond Drill bit test, the basic solution to the mining area quartzite strata low drilling efficiency problems. R81 diamond drill now on the use of the situation are as follows. First, drilling into the strata Quartzite: quartz content of about 98%, as hard, dense or with a small amount of pyrite star and joints, points on the next two layers, the thickness of 17 to 55 meters, drillability 11-12 level. Mixed rock: the main component of quartz, feldspar, etc., more complete, drillability of 10 to 11 levels.