| 高瓦斯煤层深孔预裂爆破增透数值模拟试验 |
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| 引用本文： | 蔡峰,刘泽功,林柏泉.高瓦斯煤层深孔预裂爆破增透数值模拟试验[J].辽宁工程技术大学学报(自然科学版),2009,28(4). |
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| 作者姓名： | 蔡峰 刘泽功 林柏泉 |
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| 作者单位： | 1. 安徽理工大学资管系,安徽,淮南,232001
2. 中国矿业大学安全工程学院,江苏,徐州,221100 |
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| 基金项目： | 国家科技支撑计划基金资助项目，国家科技支撑计划基金资助项目，国家自然科学重点基金资助项目，安徽省优秀青年基金资助项目，安徽省高校科技创新团队计划基金资助项目(2006KJ005TD):安徽省自然基金资助项目 |
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| 摘 要： | 为了解决高瓦斯低透气性煤层的瓦斯抽放难题,利用数值模拟和现场测试相结合的方法,研究了深孔预裂爆破技术对高瓦斯低透气性煤层的卸压增透效果.研究结果再现了爆破过程中,动压冲击震裂、应力波传播与叠加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,表明深孔预裂爆破技术有效地提高了煤层透气性和瓦斯抽采率.该成果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 |
Numerical simulation on increase of permeability using deep-hole pre-splitting explosion in coal seam |
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| CAI Feng,LIU Zegong,LIN Boquan.Numerical simulation on increase of permeability using deep-hole pre-splitting explosion in coal seam[J].Journal of Liaoning Technical University (Natural Science Edition),2009,28(4). |
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| Authors: | CAI Feng LIU Zegong LIN Boquan |
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| Institution: | CAI Feng1,LIU Zegong1,LIN Boquan2 (1. Department of Resources Exploration and Management Engineering,Anhui University of Science and Technology,Huainan 232001,China,2. School of Safety Engineering,China University of Mining and Technology,Xuzhou 221100,China) |
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| Abstract: | It is difficult to conduct gas drainage in a high gassy and low permeability coal seam. This paper presents a study to comprehend the performance of increasing permeability by deep-hole pre-splitting explosion using numerical simulation and field measurement. The study reveals the process of explosion,cracking caused by dynamic pressure,stress wave transmission and superposition,and crack propagation driven by explosion gas. Also,the study investigates how the pre-splitting drillhole interval affects the cr... |
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| Keywords: | high gassy and low permeability coal seam deep-hole pre-splitting explosion stress waves cracks growth vibration superposition effect |
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