Numerical Simulation Research on Deep-Hole Prcsplitting Explosion in Coal Seam to Intensified Improve Permeability Based on Taylor Method

摘要：

Deep-hole presplitting explosion provides an effective method for promoting permeability of high gassy and low permeability coal seam, and farther solves the difficult problem of gas drainage in this high gassy and low permeability coal seam. The present paper created a new damage model for explosive for LS-DYNA3D, taking advantage of Taylor method aimed at the high gassy and low permeability coal seam, and numerical simulated and analyzed the deep-hole presplitting explosion. Reappeared all of the process of explosion, including cracks caused by dynamic pressure, transmission and vibration superposition of stress waves, as well as cracks growth driven by gas generated by explosion. The influence of the cracks generated in the process of explosion and performance of improving permeability caused by the difference of interval between explosive holes was analyzed. And reasonable interval between explosive holes of deep-hole presplitting explosion in high gassy and low permeability coal seam is proposed. And the.resolution of gas drainage in high gassy and low permeability coal seam is putted forward.

关键词： high gassy low permeability coal seam deep-hole presplitting explosion stress waves cracks growth vibration superposition effect

作者: CAI Feng LIU Zegong LIN Boquan

作者单位: School of Resource and Safety of Anhui University of Science and Technology,Huainan 232001,Anhui,Chi China University of Mining and Technology,Xuzhou 221100,Jiangsu,China

会议类型: 国际会议

会议名称: The 2008 International Symposium on Safety Science and Technology(2008年安全科学技术国际会议)

会议地点: 北京

会议语种:英文

页码: 1628-1632

在线出版日期: 2008-09-24（万方平台首次上网日期，不代表论文的发表时间）