控制孔定向致裂机理的研究及应用  

Mechanism Research of Directional Fracturing of Control Hole and Application

作　　者：张凯[1] 黄文尧[1] 陈秋宇[1] 胡鑫[1] 

机构地区：[1]安徽理工大学化学工程学院,淮南232001

出　　处：《爆破》2014年第1期16-18,31,共4页Blasting

基　　金：安徽省高等学校省级自然科学基金项目(KJ2013A102)

摘　　要：在采煤工作面坚硬岩石断层中采用超前深孔爆破是一项新的技术。借助超动态应变测试系统,利用预埋应变片的水泥模型研究控制孔定向致裂机理并进行工程爆破试验。结果表明:合理布置控制孔,使爆破应力场中的控制孔具有应力集中效应,爆破后的岩石能按照控制孔和装药孔的连线方向断裂,这对于提高超前深孔爆破弱化坚硬断层的效率具有重要的指导意义。The advance deep-hole blasting is a new technology to rupture the rock which appears in rock path of the coal work face. With the help of an ultra-dynamic strain test system, a cement pattern in which some strain gauges were buried in advance was applied to research the directional fracturing mechanism of control hole, and a blasting engineering experimental was designed. The result shows the rock could fracture according to the lines among the charging holes and the control holes when the control holes had stress concentration effect in blasting stress field through rational design. It has important guiding significance to improve the efficiency of rupturing the rock by ad- vance deeD-hole blasting.

关 键 词：控制孔 定向致裂 超前深孔爆破 断层 

分 类 号：TD235.37[矿业工程—矿井建设]