基于微地震监测的华丰煤矿深孔爆破防冲技术
|
摘要
为提高深孔爆破措施对防治华丰煤矿冲击地压的有效性,采用微地震监测技术连续监测其1410工作面围岩破裂情况。根据采场附近岩层"破裂-应力"对应关系,得到工作面前方、侧向及垂直方向上的支承压力峰值区,由此确定深孔爆破卸压的具体参数。结果表明:卸压孔深40 m(倾向投影为4倍采高)时,爆破对煤岩的整体性破坏明显,煤岩体中积聚的弹性能得到释放。监测期间共释放能量9.47 MJ,高应力区向煤岩深部转移,采场附近形成一定的卸载区域,减弱或消除了煤岩体的冲击危险性。
For the sake of improving validity of rock burst prevention in Huafeng coal mine by deep-hole blasting,microseismic events of 1410 coal mining face with strong burst trend were monitored.According to corresponding relation between fracture and stress near the stope,areas with peak abutment pressures in front,lateral and vertical directions of face were obtained.Therefore,parameters of deep-hole blasting were determined.The results show that when the hole depth was 40 m which was 4 times of mining height in inclination projection,coal and rock integrity can be destroyed significantly through blasting,that the elastic energy accumulated can be released,that release of 9.47 MJ was observed during the monitoring periode,and that an unloaded region formed near stope after high-stress areas moved deeper.
For the sake of improving validity of rock burst prevention in Huafeng coal mine by deep-hole blasting,microseismic events of 1410 coal mining face with strong burst trend were monitored.According to corresponding relation between fracture and stress near the stope,areas with peak abutment pressures in front,lateral and vertical directions of face were obtained.Therefore,parameters of deep-hole blasting were determined.The results show that when the hole depth was 40 m which was 4 times of mining height in inclination projection,coal and rock integrity can be destroyed significantly through blasting,that the elastic energy accumulated can be released,that release of 9.47 MJ was observed during the monitoring periode,and that an unloaded region formed near stope after high-stress areas moved deeper.
引文
[1]王平,姜福兴,王存文,等.冲击地压的应力增量预报方法[J].煤炭学报,2010,35(S1):5-9.WANG Ping,JIANG Fu-xing,WANG Cun-wen,et al.The stress incremental forecasting method of rock burst[J].Journal of China in Coal Society,2010,35(S1):5-9.
[2]王述红,刘建新,唐春安,等.煤岩开采过程冲击地压发生机理及数值模拟研究[J].岩石力学与工程学报,2002,21(S2):2 480-2 483.WANG Shu-hong,LIU Jian-xin,TANG Chun-an,et al.Study on generation and numerical simulation of impact pressure incoal layer mining process[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(S2):2 480-2 483.
[3]DOU Lin-ming,LU Cai-ping,MU Zong-long,et al.Prevention and forecasting of rock burst hazards in coal mines[J].Mining Science and Technology,2009,19(5):585-591.
[4]潘一山,李忠华,章梦涛.我国冲击地压分布、类型、机理及防治研究[J].岩石力学与工程学报,2003,22(11):1844-1851.PAN Yi-shan,LI Zhong-hua,ZHANG Meng-tao.Distribution,type,mechanism and prevention of rockburst in China[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(11):1 844-1 851.
[5]齐庆新,雷毅,李宏艳,等.深孔断顶爆破防治冲击地压的理论与实践[J].岩石力学与工程学报,2007,26(S1):3 522-3 527.QI Qing-xin,LEI Yi,LI Hong-yan,et al.Theory and application of prevention of rock burst by break-tip blast in deephole[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(S1):3 522-3 527.
[6]蓝航,齐庆新,潘俊锋,等.我国煤矿冲击地压特点及防治技术分析[J].煤炭科学技术,2011,39(1):11-15.LAN Hang,QI Qing-xin,PAN Jun-feng,et al.Analysis of features as well as prevention and control technology of minestrata pressure bumping in China[J].Coal Science and Technology,2011,39(1):11-15.
[7]杨淑华,张兴民,姜福兴,等.微地震定位监测的深孔检波器及其安装技术[J].北京科技大学学报,2006,28(1):68-70,100.YANG Shu-hua,ZHANG Xing-min,JIANG Fu-xing,et al.Deep hole geophones and installing techniques used in micro-seismic monitoring[J].Journal of University of Science and Technology Beijing,2006,28(1):68-70,100.
[8]Milev A M,Spottisswoode S M.Effect of the rock properties on mining-induced seismicity around the ventersdorp contactreef,Witwatersrand Basin,South Africa[J].Pure Appl Geophys,2002,159(1/3):165-177.
[9]贺虎,窦林名,巩思园,等.覆岩关键层运动诱发冲击的规律研究[J].岩土工程学报,2010,32(8):1260-1265.HE Hu,DOU Lin-ming,GONG Si-yuan,et al.Rock burst rules induced by cracking of overlying key stratum[J].ChineseJournal of Geotechnical Engineering,2010,32(8):1 260-1 265.
[10]姜福兴,XUN Luo.微震监测技术在矿井岩层破裂监测中的应用[J].岩土工程学报,2002,24(2):147-149.JIANG Fu-xing,XUN Luo.Application of microseismic monitoring technology of strata fracturing in underground coalmine[J].Chinese Journal of Geotechnical Engineering,2002,24(2):147-149.
[11]姜福兴,杨淑华,成云海,等.煤矿冲击地压的微地震监测研究[J].地球物理学报,2006,49(5):1511-1516.JIANG Fu-xing,YANG Shu-hua,CHENG Yun-hai,et al.A study of microseismic monitoring of rock burst in coalmine[J].Chinese Journal of Geophysics,2006,49(5):1 511-1 516.
[12]成云海.煤矿井下深孔微震监测装置:中国,200620087979.1[P].2007-10-31.CHENG Yun-hai.Device of Microseismic Monitoring for Deep Hole in the Coal Mine:China,200620087979.1[P].2007-10-31.
[13]陈秋宇,黄文尧,袁胜芳,等.煤矿深孔预裂爆破技术应用研究[J].工程爆破,2011,17(2):37-39.CHEN Qiu-yu,HUANG Wen-yao,YUAN Sheng-fang,et al.Research on application of deep-hole presplitting blastingtechnology in the coal mine[J].Engineering Blasting,2011,17(2):37-39.
[14]吴亮,卢文波,宗琦.岩石中柱状装药爆炸能量分布[J].岩土力学,2006,27(5):735-739.WU Liang,LU Wen-bo,ZONG Qi.Distribution of explosive energy consumed by column charge in rock[J].Rock andSoil Mechanics,2006,27(5):735-739.
[15]索永录.坚硬顶煤弱化爆破的破坏区分布特征[J].煤炭学报,2004,29(6):650-653.SUO Yong-lu.Distribution characteristic of breaking extending area of weakening-blast in hard top-coal[J].Journal ofChina in Coal Society,2004,29(6):650-653.
[2]王述红,刘建新,唐春安,等.煤岩开采过程冲击地压发生机理及数值模拟研究[J].岩石力学与工程学报,2002,21(S2):2 480-2 483.WANG Shu-hong,LIU Jian-xin,TANG Chun-an,et al.Study on generation and numerical simulation of impact pressure incoal layer mining process[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(S2):2 480-2 483.
[3]DOU Lin-ming,LU Cai-ping,MU Zong-long,et al.Prevention and forecasting of rock burst hazards in coal mines[J].Mining Science and Technology,2009,19(5):585-591.
[4]潘一山,李忠华,章梦涛.我国冲击地压分布、类型、机理及防治研究[J].岩石力学与工程学报,2003,22(11):1844-1851.PAN Yi-shan,LI Zhong-hua,ZHANG Meng-tao.Distribution,type,mechanism and prevention of rockburst in China[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(11):1 844-1 851.
[5]齐庆新,雷毅,李宏艳,等.深孔断顶爆破防治冲击地压的理论与实践[J].岩石力学与工程学报,2007,26(S1):3 522-3 527.QI Qing-xin,LEI Yi,LI Hong-yan,et al.Theory and application of prevention of rock burst by break-tip blast in deephole[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(S1):3 522-3 527.
[6]蓝航,齐庆新,潘俊锋,等.我国煤矿冲击地压特点及防治技术分析[J].煤炭科学技术,2011,39(1):11-15.LAN Hang,QI Qing-xin,PAN Jun-feng,et al.Analysis of features as well as prevention and control technology of minestrata pressure bumping in China[J].Coal Science and Technology,2011,39(1):11-15.
[7]杨淑华,张兴民,姜福兴,等.微地震定位监测的深孔检波器及其安装技术[J].北京科技大学学报,2006,28(1):68-70,100.YANG Shu-hua,ZHANG Xing-min,JIANG Fu-xing,et al.Deep hole geophones and installing techniques used in micro-seismic monitoring[J].Journal of University of Science and Technology Beijing,2006,28(1):68-70,100.
[8]Milev A M,Spottisswoode S M.Effect of the rock properties on mining-induced seismicity around the ventersdorp contactreef,Witwatersrand Basin,South Africa[J].Pure Appl Geophys,2002,159(1/3):165-177.
[9]贺虎,窦林名,巩思园,等.覆岩关键层运动诱发冲击的规律研究[J].岩土工程学报,2010,32(8):1260-1265.HE Hu,DOU Lin-ming,GONG Si-yuan,et al.Rock burst rules induced by cracking of overlying key stratum[J].ChineseJournal of Geotechnical Engineering,2010,32(8):1 260-1 265.
[10]姜福兴,XUN Luo.微震监测技术在矿井岩层破裂监测中的应用[J].岩土工程学报,2002,24(2):147-149.JIANG Fu-xing,XUN Luo.Application of microseismic monitoring technology of strata fracturing in underground coalmine[J].Chinese Journal of Geotechnical Engineering,2002,24(2):147-149.
[11]姜福兴,杨淑华,成云海,等.煤矿冲击地压的微地震监测研究[J].地球物理学报,2006,49(5):1511-1516.JIANG Fu-xing,YANG Shu-hua,CHENG Yun-hai,et al.A study of microseismic monitoring of rock burst in coalmine[J].Chinese Journal of Geophysics,2006,49(5):1 511-1 516.
[12]成云海.煤矿井下深孔微震监测装置:中国,200620087979.1[P].2007-10-31.CHENG Yun-hai.Device of Microseismic Monitoring for Deep Hole in the Coal Mine:China,200620087979.1[P].2007-10-31.
[13]陈秋宇,黄文尧,袁胜芳,等.煤矿深孔预裂爆破技术应用研究[J].工程爆破,2011,17(2):37-39.CHEN Qiu-yu,HUANG Wen-yao,YUAN Sheng-fang,et al.Research on application of deep-hole presplitting blastingtechnology in the coal mine[J].Engineering Blasting,2011,17(2):37-39.
[14]吴亮,卢文波,宗琦.岩石中柱状装药爆炸能量分布[J].岩土力学,2006,27(5):735-739.WU Liang,LU Wen-bo,ZONG Qi.Distribution of explosive energy consumed by column charge in rock[J].Rock andSoil Mechanics,2006,27(5):735-739.
[15]索永录.坚硬顶煤弱化爆破的破坏区分布特征[J].煤炭学报,2004,29(6):650-653.SUO Yong-lu.Distribution characteristic of breaking extending area of weakening-blast in hard top-coal[J].Journal ofChina in Coal Society,2004,29(6):650-653.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心