潘西煤矿低瓦斯煤层喷孔动力显现规律研究
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摘要
为揭示潘西煤矿深部低瓦斯煤层喷孔动力显现规律,在潘西煤矿6198工作面对瓦斯含量与采动应力进行了现场测试,并采用FLAC3D软件对6198工作面前方应力分布进行了模拟分析,总结了工作面瓦斯含量和应力分布规律,分析了低瓦斯煤层喷孔动力显现机制。研究结果表明:①潘西煤矿6198工作面整体瓦斯含量偏低,采深越大,瓦斯含量越高。②受断层影响,工作面前方应力集中系数最大为1.36。③潘西煤矿6198工作面低瓦斯煤层喷孔等动力显现现象是高应力作用下煤体破碎、瓦斯压力作用下煤体喷出的过程;煤体释放的内部潜能和瓦斯内能为煤体破碎和移动提供能量,与浅部煤层相比,深部低瓦斯煤层喷孔动力显现所需的瓦斯膨胀能阈值降低。
In order to reveal dynamic appearance regularity of blow-out from drilling hole in deep low gas coal seam of Panxi Coal Mine,field tests of gas content and mining stress were carried out in 6198 working face of Panxi Coal Mine,and simulation analysis of stress distribution in front of 6198 working face was also done by use of FLAC3 Dsoftware.Distribution regularities of gas content and stress in the working face were studied,and dynamic appearance mechanism of blow-out from drilling hole in low gas coal seam was analyzed.The study results show that gas content in 6198 working face is low in general,and the greater mining depth is,the higher gas content is.Affected by faults,the maximum stress concentration factor in front of the working face is 1.36.Dynamic appearance of blow-out from drilling hole in low gas coal seam in 6198 working face of Panxi Coal Mine is a process of coal body crushing under high stress and then spraying under gas pressure.Internal potential released by coal body and gas internal energy can provide energy for coal body to break and move.Compared with shallow coal seam,threshold of gas expansion energy decreases which causes dynamic appearance of blow-out from drilling hole in deep low gas coal seam.
In order to reveal dynamic appearance regularity of blow-out from drilling hole in deep low gas coal seam of Panxi Coal Mine,field tests of gas content and mining stress were carried out in 6198 working face of Panxi Coal Mine,and simulation analysis of stress distribution in front of 6198 working face was also done by use of FLAC3 Dsoftware.Distribution regularities of gas content and stress in the working face were studied,and dynamic appearance mechanism of blow-out from drilling hole in low gas coal seam was analyzed.The study results show that gas content in 6198 working face is low in general,and the greater mining depth is,the higher gas content is.Affected by faults,the maximum stress concentration factor in front of the working face is 1.36.Dynamic appearance of blow-out from drilling hole in low gas coal seam in 6198 working face of Panxi Coal Mine is a process of coal body crushing under high stress and then spraying under gas pressure.Internal potential released by coal body and gas internal energy can provide energy for coal body to break and move.Compared with shallow coal seam,threshold of gas expansion energy decreases which causes dynamic appearance of blow-out from drilling hole in deep low gas coal seam.
引文
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[2]潘一山.煤与瓦斯突出、冲击地压复合动力灾害一体化研究[J].煤炭学报,2016,41(1):105-112.PAN Yishan.Integrated study on compound dynamic disaster of coal-gas outburst and rockburst[J].Journal of China Coal Society,2016,41(1):105-112.
[3]姜福兴,杨光宇,魏全德,等.煤矿复合动力灾害危险性实时预警平台研究与展望[J].煤炭学报,2018,43(2):333-339.JIANG Fuxing,YANG Guangyu,WEI Quande,et al.Study and prospect on coal mine composite dynamic disaster real-time prewarning platform[J].Journal of China Coal Society,2018,43(2):333-339.
[4]朱丽媛,李忠华,刘瀚琦.深部开采煤岩瓦斯动力灾害统一发生机制及监测技术[J].安全与环境学报,2017,17(3):937-942.ZHU Liyuan,LI Zhonghua,LIU Hanqi.Consequential mechanism and the monitoring technique for the gassy coal rock dynamics disaster in the deep mining[J].Journal of Safety and Environment,2017,17(3):937-942.
[5]舒龙勇,齐庆新,王凯,等.煤矿深部开采卸荷消能与煤岩介质属性改造协同防突机理[J].煤炭学报,2018,43(11):3023-3032.SHU Longyong,QI Qingxin,WANG Kai,et al.Coordinated prevention mechanism of pressure-relief and coal and rock properties modification for coal and gas outburst in deep mining of coal mines[J].Journal of China Coal Society,2018,43(11):3023-3032.
[6]谢和平,高峰,鞠杨.深部岩体力学研究与探索[J].岩石力学与工程学报,2015,34(11):2161-2178.XIE Heping,GAO Feng,JU Yang.Research and development of rock mechanics in deep ground engineering[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(11):2161-2178.
[7]何满潮,谢和平,彭苏萍,等.深部开采岩体力学研究[J].岩石力学与工程学报,2005,24(16):2803-2813.HE Manchao,XIE Heping,PENG Suping,et al.Study on rock mechanics in deep mining engineering[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(16):2803-2813.
[8]何满潮,彭涛.高应力软岩的工程地质特征及变形力学机制[J].矿山压力与顶板管理,1995(2):8-11.HE Manchao,PENG Tao.Engineering geological characteristics and deformation mechanics mechanism of high stress soft rock[J].Ground Pressure and Strata Control,1995(2):8-11.
[9]赵旭生.“低指标突出现象”原因分析及防范对策[J].煤矿安全,2007,38(5):67-69.ZHAO Xusheng.Cause analysis and preventive measures of"low index prominence"[J].Safety in Coal Mines,2007,38(5):67-69.
[10]崔树江,许建斌,王吉生.低指标突出问题在突出危险性预测中的分析[J].华北科技学院学报,2010,7(4):30-32.CUI Shujiang,XU Jianbin,WANG Jisheng.Analysis of low index outburst problem in outburst risk prediction[J].Journal of North China University of Science and Technology,2010,7(4):30-32.
[11]张建国.平顶山矿区构造环境对煤与瓦斯突出的控制作用[J].采矿与安全工程学报,2013,30(3):432-436.ZHANG Jianguo.Control effect of structure environment to coal and gas outburst in Pingdingshan mining area[J].Journal of Mining&Safety Engineering,2013,30(3):432-436.
[12]李云波,姜波,张玉贵.新密矿区低临界值瓦斯动力现象及机理[J].煤田地质与勘探,2015,43(6):1-7.LI Yunbo,JIANG Bo,ZHANG Yugui.Low-threshold coal and gas outburst dynamic phenomenon and mechanism in Xinmi coal mining area[J].Coal Geology&Exploration,2015,43(6):1-7.
[13]钱鸣高,刘听成.矿山压力及其控制[M].北京:煤炭工业出版社,1999.
[14]刘晓斐,王恩元,何学秋,等.回采工作面应力分布的电磁辐射规律[J].煤炭学报,2007,32(10):1019-1022.LIU Xiaofei,WANG Enyuan,HE Xueqiu,et al.Electromagnetic radiation laws of the stress distribution in working face[J].Journal of China Coal Society,2007,32(10):1019-1022.
[15]杨贺,邱黎明,汪皓,等.远距离下保护层开采上覆煤岩层采动应力场数值模拟研究[J].工矿自动化,2017,43(6):37-41.YANG He,QIU Liming,WANG Hao,et al.Numerical simulation research on mining stress field of overlying coal-rock seam under far distance lower protective seam mining[J].Industry and Mine Automation,2017,43(6):37-41.