岩石炮孔预切槽爆破断裂成缝机理研究  

Investigations into mechanism of crack formation for grooved hole well blasting

作　　者：宗琦[1] 

机构地区：[1]淮南矿业学院土木系

出　　处：《岩土工程学报》1998年第1期30-33,共4页Chinese Journal of Geotechnical Engineering

摘　　要：应用岩石断裂力学理论和爆生气体膨胀准静压理论，建立了岩石中炮孔不偶合装药孔壁预切槽爆破时的脆性断裂力学模型，分析了裂缝的扩展规律，包括起裂、止裂条件、起裂方向、扩展长度和裂缝扩展过程中的速度变化等。此外，本文还就炮孔预切槽爆破时的动态效应进行了初步探讨。Based on the theory of rock fracture mechanics and function of explosion gas,the beginning and end condition as well as the developing direction, speed and length are analysed when decoupling charge is adopted for symmetric grooved hole well. Crack dynamic effects of grooved blasting are preliminary investigated. Theoretical reference is offfered for the determination of grooved blasting parameters.

关 键 词：切槽爆破 裂缝 爆破断裂机理 炮孔 矿业 

分 类 号：TD235.1[矿业工程—矿井建设]