煤层深孔聚能爆破裂隙扩展数值模拟  

Numerical simulation on crack propagation of coal bed deep-hole cumulative blasting

作　　者：郭德勇[1] 吕鹏飞[1] 裴海波[1] 单智勇[2] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083 [2]焦作煤业(集团)有限责任公司,河南焦作454002

出　　处：《煤炭学报》2012年第2期274-278,共5页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(40772098;41072118)

摘　　要：在煤层深孔聚能爆破现场试验的基础上,应用非线性动力分析有限元软件ANSYS/LS-DY-NA对煤体致裂过程进行了模拟,探讨聚能爆破作用下煤体力学行为及裂隙扩展机理。研究表明,爆破改变了煤体应力状态,聚能效应导致煤体力学性质在聚能方向发生显著变化。此外在聚能方向上煤体粉碎区范围相对较小,而裂隙扩张半径明显大于非聚能方向。Based on the field experiments of coal bed deep-hole cumulative blasting,nonlinear dynamic analysis finite element software ANSYS/LS-DYNA was applied to simulate splitting process, investigate coal body mechanical behav- ior and crack propagating mechanism under cumulative blasting. The studies show that blasting changes coal body stress state, and cumulative effect leads to significant changes of mechanical property in cumulative direction. Further- more, crush zone range in cumulative direction is relatively smaller, but crack propagating range is distinctly larger than that in the non-cumulative direction.

关 键 词：聚能爆破 裂隙扩展 数值模拟 煤层透气性 

分 类 号：TD713.32[矿业工程—矿井通风与安全]