| 高瓦斯低透气性煤层深孔预裂爆破增透数值模拟 |
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| 引用本文： | 蔡峰,刘泽功,张朝举,林柏泉.高瓦斯低透气性煤层深孔预裂爆破增透数值模拟[J].煤炭学报,2007,32(5):499-503. |
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| 作者姓名： | 蔡峰 刘泽功 张朝举 林柏泉 |
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| 作者单位： | 安徽理工大学 资源开发与管理工程系，安徽 淮南，232001 |
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| 基金项目： | 国家自然科学基金
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安徽省优秀青年科技基金
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安徽省高校科技创新团队计划
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安徽省自然科学基金 |
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| 摘 要： | 针对高瓦斯低透气性煤层，采用Taylor方法建立了一个新的LS-DYNA3D爆破损伤模型，对深孔预裂爆破进行了数值模拟研究，再现了爆破过程中，动压冲击震裂、应力波传播与叠加以及爆生气体驱动裂纹扩展的整个过程，分析了爆破孔间距对爆生裂纹和爆破增透效果的影响，提出了高瓦斯低透气性煤层深孔预裂爆破的合理间距为5~6 m，为高瓦斯低透气性煤层的瓦斯抽放提出了解决方案.
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| 关 键 词： | 高瓦斯低透气性煤层 深孔预裂爆破 应力波 裂纹扩展 叠加效应 |
| 文章编号： | 0253-9993(2007)05-0499-05 |
| 收稿时间： | 07 1 2006 12:00AM |
| 修稿时间： | 2006年7月1日 |
Numerical simulation of improving permeability by deep-hole presplitting explosion in loose-soft and low permeability coal seam |
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| CAI Feng,LIU Ze-gong,ZHANG Chao-ju,LIN Bai-quan.Numerical simulation of improving permeability by deep-hole presplitting explosion in loose-soft and low permeability coal seam[J].Journal of China Coal Society,2007,32(5):499-503. |
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| Authors: | CAI Feng LIU Ze-gong ZHANG Chao-ju LIN Bai-quan |
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| Affiliation: | 1. Department of Resources Exploration and Management Engineering, Anhui University of Science and Technology, Hnainan 232001, China ; 2. Qi - dong Coal Mine, Wanbei Coal-electricity Group, Suzhou 234115, China; 3. School of Mining and Safety Engineering, China University of Mining and Technology, Xuzhou 221008, China |
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| Abstract: | A new damage model was built for explosive for LS-DYNA3D by taking advantage of Taylor method aimed at the high gassy and low permeability coal seam,and the deep-hole presplitting explosion was numerical simulated.Represent all of the explosion process,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(5~6 m) between explosive holes of deep-hole presplitting explosion in high gassy and low permeability coal seam was proposed.And the resolution of gas drainage in high gassy and low permeability coal seam was put forward. |
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| Keywords: | high gassy and low permeability coal seam deep-hole presplitting explosion stress waves cracks growth vibration superposition effect |
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