| 石门揭煤深孔预裂爆破增透效果试验研究 |
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| 引用本文： | 刘健,刘泽功,蔡峰. 石门揭煤深孔预裂爆破增透效果试验研究[J]. 煤炭科学技术, 2011, 39(6): 30-32,128 |
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| 作者姓名： | 刘健 刘泽功 蔡峰 |
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| 作者单位： | 安徽理工大学能源与安全学院,安徽,淮南232001;煤矿安全高效开采省部共建教育部重点实验室,安徽淮南232001 |
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| 基金项目： | 国家自然科学基金资助项目(51004003,50974004); 安徽高校省级自然科学研究重点资助项目(KJ2010AO91) |
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| 摘 要： | 针对低透气性突出煤层钻孔抽采瓦斯难、石门揭煤速度缓慢等问题,研究了低透气性煤层深孔预裂爆破卸压增透的防突机理,通过理论分析、深孔预裂爆破药柱研发及现场试验相结合的方法,测试了淮南矿区某矿东四采区B组5-2煤层深孔预裂爆破煤层松动半径;依据此参数,优化设计了5-2煤层抽采钻孔和爆破孔。结果表明:在低透气性突出煤层实施深孔预裂爆破增透技术措施后,煤体的弹性潜能得到有效释放,煤层瓦斯压力梯度降低,有效消除了激发突出的应力,煤层的透气性系数提高了123倍,煤层瓦斯抽采纯量比爆破前提高了6~9倍,石门揭煤时间大幅缩短,仅为47 d,比传统的揭煤方法揭煤时间缩短近2个月,为采掘正常接替提供了保证。
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| 关 键 词： | 低透气性突出煤层 石门揭煤 深孔预裂爆破 增透 |
Experiment Study on Pre-cracking Blasting and Permeability Improvement Effect with Deep Borehole for Seam Opening of Crosscut |
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| LIU Jian,LIU Ze-gong,CAI Feng. Experiment Study on Pre-cracking Blasting and Permeability Improvement Effect with Deep Borehole for Seam Opening of Crosscut[J]. Coal Science and Technology, 2011, 39(6): 30-32,128 |
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| Authors: | LIU Jian LIU Ze-gong CAI Feng |
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| Affiliation: | LIU Jian1,2,LIU Ze-gong1,CAI Feng1,2(1.School of Energy and Safety,Anhui University of Science and Technology,Huainan 232001,China,2.Provincial and Ministry of Education Joint Key Lab of Mine Safety and High Efficient Mining,China) |
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| Abstract: | According to the difficult borehole gas drainage in the low permeability outburst seam,the slow seam opening speed of the crosscut and other problems,the paper had a study on the outburst prevention mechanism of the pre-cracking blasting and permeability improvement with the deep boreholes in the low permeability seam.With the theoretical analysis,the research and development of the deep borehole pre-cracking blasting explosive cartridge and the site test combined method,the pre-cracking blasting vibration ... |
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| Keywords: | low permeability outburst seam seam opening of crosscut deep borehole pre-cracking blasting permeability improvement |
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