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一种既可在现场、又可在实验室测定岩石可钻性的简易凿测器研制成功,用凿碎比功和钎刃磨钝宽两项指标表示岩石可钻性。已测定了37个矿山和工地的62种岩石,806个岩样的可钻性,研究了可钻性与各类设备钻孔速度的相关性。回归分析的结果说明,凿碎比功和钻孔速度之间有重要的相关关系。本文提出了凿碎法岩石可钻性分级方案,按凿碎比功将岩石分为Ⅰ～Ⅶ级,按钎刃磨钝宽分为1～3类,用两项指标综合表示可钻性。上述分级方案已在部分矿山试用,取得了良好的效果。
A simple chisel, which can measure the drillability of rock both in the field and in the laboratory, has been successfully developed. The drillability of rock is expressed by two indexes, chisel specific work and drill blunt width. The drillability of 62 rocks and 806 rock samples from 37 mines and sites has been measured and the correlation between drillability and drilling speed for various types of equipment has been studied. The results of regression analysis show that there is an important correlation between the specific power and drilling speed. In this paper, the classification scheme of rock drillability for rock fragmentation method is proposed. The rock is divided into grade Ⅰ ~ Ⅶ according to specific work, and blunted width is divided into 1 ~ 3 categories. The above grading scheme has been tested in some mines and has achieved good results.