聚能管装药预裂爆破模拟试验研究  

Pre-splitting Blasting with Binding Energy Tube Charges:Simulations and Experimental Research

作　　者：杨仁树[1] 佟强[2] 杨国梁[1] 

机构地区：[1]中国矿业大学煤炭资源与安全开采国家重点实验室深部岩土力学与地下工程国家重点实验室,北京100083 [2]新汶矿业集团公司翟镇矿,山东泰安271207

出　　处：《中国矿业大学学报》2010年第5期631-635,共5页Journal of China University of Mining & Technology

基　　金：国家高技术研究发展计划(863)项目(2007AA06Z131);国家自然科学基金项目(50774086);“十一五”国家科技支撑计划重点项目(2008BAB33B04-3)

摘　　要：为了揭示聚能管装药爆破的细观机理,基于数值计算的可重复性及经济型,提出了采用数值模拟的方法,对聚能管不耦合装药预裂爆破进行研究.在相邻炮孔中心处,应力波发生叠加,有效应力峰值为93MPa;切缝方向孔壁的有效塑性应变为8.2%,为管壁外侧受保护孔壁的2倍.结果表明:聚能管对能量传播的导向以及对侧面岩壁的保护有显著作用.采用现场试验,对模拟结果进行验证.聚能管预裂爆破,破碎块度均匀,断面平整光滑,半眼痕率达到100%.Numerical simulation was used to study the microscopic mechanism of blasting with a cutting seam cartridge.The method was adapted to pre-splitting blasting with decoupled charges.Stress waves are predicted to overlap at the centers of adjacent boreholes.Peak stress values of 93 MPa are predicted.Plastic strain in the cutting area is 8.2%,which is twice the strain on the protected side.A binding-energy-tube has a remarkable effect on energy propagation and protection of the sidewall.In-situ experiments validated the simulations.Uniform fragmentation and a smooth cross-section were obtained with cutting seam cartridge blasting.The half-hole mark ratio is as high as 100%.Simulations and experimental results both provide a guide for the improvement of pre-splitting blasting techniques.

关 键 词：预裂爆破 数值模拟 试验研究 不耦合装药 聚能管 

分 类 号：TD235.1[矿业工程—矿井建设]