摘要
通过LS-DYNA数值软件模拟了普通药包和切缝药包在岩石中的爆炸过程,研究了爆炸过程中爆生产物的传播过程及炮孔壁空气应力值特性。结果表明:普通药包和切缝药包炸药内的爆炸过程一致;切缝药包炸药内爆炸完成后,爆生产物在切缝处聚集释放,切缝管在爆生产物的推动下向外移动,切缝方向岩石产生初始裂纹,应力明显大于非切缝方向;切缝药包切缝方向炮孔壁空气最先达到应力峰值且作用时间相对较长,切缝药包定向断裂效果显著。
Explosions of ordinary cartridge and slotted cartridge were simulated by LS-DYNA,leading to the attributes of explosion spreading process caused by blasting-inducing productions and air element pressure on the borehole wall.The results show that the explosions in ordinary cartridge and slotted cartridge were the same.Explosion in slotted cartridge,followed by blasting-inducing productions all released in the cutting seam.Cutting seam pipe moved downwards pushed by blastinginducing productions.Rocks in the direction towards cutting seam had initial cracks,in which case,pressure involved was more severe than that in non-cutting-seam side.The first to reach peak pressure was the borehole air in the direction of cutting-seam side which took relatively long time to function and resulted in notable directional fracture.
作者
陈帅志
付晓强
陈正拜
林海
LS-DYNA CHEN Shuai-zhi;FU Xiao-qiang;CHEN Zheng-bai;LIN Hai(School of Mechanics and Civil Engineering,China University of Mining and Technology（Beijing）,Beijing 100083,China)
出处
《煤炭技术》
CAS
2018年第10期62-64,共3页
Coal Technology
基金
国家重点研发计划资助(2016YFC0600903)
国家自然科学基金资助(51404273)
高等学校学科创新引智计划项目资助(B14006)
关键词
普通药包
切缝药包
定向断裂
数值模拟
ordinary cartridge
slotted cartridge
directional fracture
numerical simulation
