团柏煤矿带压开采条件下11-101工作面合理长度
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摘要
山西省霍州团柏煤矿11-101工作面为带压开采。为预防回采期间底板突水事故,采用弹塑性理论、现场实测、数值模拟验证相结合的方法,对不同工作面长度条件下底板破坏深度发育规律进行研究,进而确定该条件下开采的工作面合理长度。研究表明,随着工作面推进,滞后工作面6 m左右底板首先发生拉伸破坏,底板破坏呈楔形。工作面长度在60～120 m,破坏深度随着工作面长度增加呈线性增长,平均每增加10 m,破坏深度加深1 m。理论计算与数值模拟计算得出80 m工作面底板破坏深度为7～8 m,现场实测底板破坏深度为7.5 m,故工作面合理开采长度为80 m时,能够确保11-101工作面生产安全。
The working face 11-101 of Tuanbai coal mine in Huozhou, Shanxi Province is exploited above aquifer.In order to prevent floor water inrush accidents during mining, research combination of elasto-plastic theory,on-site measurement and numerical simulation was carried out to analyze the development rule of failure depth of the floor, then the reasonable length of the mining face under this condition was determined. The result shows that with the advancement of working face, the bottom plate of lagging working face is stretched and destroyed at about 6 m behind the lagging working face, and the bottom plate has a wedge shape. The length of the working face is in the range of 60 m to 120 m. The damage depth increases linearly with the length of the working face. When the length of the working face increases every 10 m, the damage depth increases by 1 m, and the reasonable mining length of the first mining face is 80 m. Theoretical calculations and numerical simulations show that the floor damage depth of the 80 m working face is 7-8 m. The actual measured failure depth of the floor is 7.5 m. Therefore,when the reasonable mining length of the working face is 80 m, the production safety of the working face 11-101 can be ensured.
The working face 11-101 of Tuanbai coal mine in Huozhou, Shanxi Province is exploited above aquifer.In order to prevent floor water inrush accidents during mining, research combination of elasto-plastic theory,on-site measurement and numerical simulation was carried out to analyze the development rule of failure depth of the floor, then the reasonable length of the mining face under this condition was determined. The result shows that with the advancement of working face, the bottom plate of lagging working face is stretched and destroyed at about 6 m behind the lagging working face, and the bottom plate has a wedge shape. The length of the working face is in the range of 60 m to 120 m. The damage depth increases linearly with the length of the working face. When the length of the working face increases every 10 m, the damage depth increases by 1 m, and the reasonable mining length of the first mining face is 80 m. Theoretical calculations and numerical simulations show that the floor damage depth of the 80 m working face is 7-8 m. The actual measured failure depth of the floor is 7.5 m. Therefore,when the reasonable mining length of the working face is 80 m, the production safety of the working face 11-101 can be ensured.
引文
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[15]张蕊,姜振泉,岳尊彩,等.采动条件下厚煤层底板破坏规律动态监测及数值模拟研究[J].采矿与安全工程学报,2012,29(5):625-630.ZHANG Rui,JIANG Zhenquan,YUE Zuncai,et al.In-situ dynamic observation and numerical analysis of thick coal seam floor’s failure law under the mining[J].Journal of Mining&Safety Engineering,2012,29(5):625-630.
[16]孙娈娈,王中华,孙燕青,等.煤层底板破坏流固耦合数值模拟[J].煤田地质与勘探,2013,41(3):55-58.SUN Luanluan,WANG Zhonghua,SUN Yanqing,et al.Fluidsolid coupling numerical simulation of coal seam floor failure[J].Coal Geology&Exploration,2013,41(3):55-58.
[17]鲁海峰,姚多喜,胡友彪,等.水压影响下煤层底板采动破坏深度弹性力学解[J].采矿与安全工程学报,2017,34(3):452-458.LU Haifeng,YAO Duoxi,HU Youbiao,et al.Elasticity solution for failure depth of mining floor under water pressure[J].Journal of Mining&Safety Engineering,2017,34(3):452-458.
[18]杜伟升,姜耀东,高林涛.带压开采底板破坏因素分析及突水预测研究[J].煤炭科学技术,2017,45(6):112-117.DU Weisheng,JIANG Yaodong,GAO Lintao.Study on water inrush prediction and floor failure factors analysis in pressurized mining coal[J].Coal Science and Technology,2017,45(6):112-117.
[19]李刚,王海平,苏俊辉.采动影响下的煤层底板岩层破坏特征:以团柏煤矿为例[J].煤田地质与勘探,2012,40(2):59-61.LI Gang,WANG Haiping,SU Junhui.Destruction features in floor caused by mining activity:With Tuanbai mine as example[J].Coal Geology&Exploration,2012,40(2):59-61.
[20]刘伟韬,申建军,贾红果.深井底板采动应力演化规律与破坏特征研究[J].采矿与安全工程学报,2016,33(6):1045-1051.LIU Weitao,SHEN Jianjun,JIA Hongguo.Mining-induced stress evolution law and failure characteristics of floor in deep mine[J].Journal of Mining&Safety Engineering,2016,33(6):1045-1051.
[2]荆自刚.峰峰二矿开采活动与底板突水关系研究[J].煤炭学报,1984,9(2):20-23.JING Zigang.Study of the relationship between water-inrush from floor and mining activities in Fengfeng No.2 coal mine[J].Journal of China Coal Society,1984,9(2):20-23.
[3]王作宇,张建华,刘鸿泉.承压水上近距离煤层重复采动的底板岩移规律[J].煤炭科学技术,1995,23(2):18-20.WANG Zuoyu,ZHANG Jianhua,LIU Hongquan.Strata movement law of repeat mining close coal layer[J].Coal Science and Technology,1995,23(2):18-20.
[4]张金才,刘天泉.论煤层底板采动裂隙带的深度及分布特征[J].煤炭学报,1990,15(2):35-38.ZHANG Jincai,LIU Tianquan.Research on the depth and distribution of coal mining floor[J].Journal of China Coal Society,1990,15(2):35-38.
[5]施龙青.底板突水机理研究综述[J].山东科技大学学报(自然科学版),2009,28(3):17-23.SHI Longqing.Summary of research on mechanism of water-inrush from seam floor[J].Journal of Shandong University of Science and Technology(Natural Science),2009,28(3):17-23.
[6]施龙青,韩进.开采煤层底板“四带”划分理论与实践[J].中国矿业大学学报,2005,34(1):16-23.SHI Longqing,HAN Jin.Theory and practice of dividing coal mining area floor into four-zone[J].Journal of China University of Mining&Technology,2005,34(1):16-23.
[7]施龙青.薄隔水层底板突水机理及预测预报研究[D].泰安:山东科技大学,1999.
[8]王家臣,许延春,徐高明,等.矿井电剖面法探测工作面底板破坏深度的应用[J].煤炭科学技术,2010,38(1):97-100.WANG Jiachen,XU Yanchun,XU Gaoming,et al.Application of mine electric profiling method to detect floor failure depth of coal mining face[J].Coal Science and Technology,2010,38(1):97-100.
[9]韩德品,郭林生,赵利利,等.瞬变电磁法快速探查煤矿突水构造关键技术及应用效果[J].煤田地质与勘探,2014,42(6):97-100.HAN Depin,GUO Linsheng,ZHAO Lili,et al.The key technology and application effects of transient electromagnetic method for rapid detecting water inrush structure in coal mine[J].Coal Geology&Exploration,2014,42(6):97-100.
[10]于雯琪,钱家忠,马雷,等.基于GIS和AHP的谢桥煤矿13-1煤顶板突水危险性评价[J].煤田地质与勘探,2016,44(1):69-73.YU Wenqi,QIAN Jiazhong,MA Lei,et al.The water inrush risk assessment of roof of seam 13-1 in Xieqiao mine based on GIS and AHP[J].Coal Geology&Exploration,2016,44(1):69-73.
[11]张平松,吴基文,刘盛东.煤层采动底板破坏规律动态观测研究[J].岩石力学与工程学报,2005,25(1):3009-3013.ZHANG Pingsong,WU Jiwen,LIU Shengdong.Study on dynamic observation of coal seam floor’s failure law[J].Chinese Journal of Rock Mechanics and Engineering,2005,25(1):3009-3013.
[12]李相臣,陈德飞,康毅力,等.基于CT扫描的煤岩孔裂隙表征[J].煤田地质与勘探,2016,44(5):58-62.LI Xiangchen,CHEN Defei,KANG Yili,et al.Characterization of pores and fractures of coal based on X-ray computed tomography[J].Coal Geology&Exploration,2016,44(5):58-62.
[13]许延春,谢小锋,董检平,等.在相似模拟试验中利用超声波检测技术探测底板破坏深度[J].煤矿开采,2016,21(1):7-11.XU Yanchun,XIE Xiaofeng,DONG Jianping,et al.Ultrasonic testing of floor breakage depth on similar simulation[J].Coal Mining Technology,2016,21(1):7-11.
[14]张文彬.综采放顶煤工作面底板应力及其破坏深度分析[J].煤炭科学技术,2010,38(12):17-21.ZHANG Wenbin.Analysis on floor stress and failure depth of fully mechanized top coal caving mining face[J].Coal Science and Technology,2010,38(12):17-21.
[15]张蕊,姜振泉,岳尊彩,等.采动条件下厚煤层底板破坏规律动态监测及数值模拟研究[J].采矿与安全工程学报,2012,29(5):625-630.ZHANG Rui,JIANG Zhenquan,YUE Zuncai,et al.In-situ dynamic observation and numerical analysis of thick coal seam floor’s failure law under the mining[J].Journal of Mining&Safety Engineering,2012,29(5):625-630.
[16]孙娈娈,王中华,孙燕青,等.煤层底板破坏流固耦合数值模拟[J].煤田地质与勘探,2013,41(3):55-58.SUN Luanluan,WANG Zhonghua,SUN Yanqing,et al.Fluidsolid coupling numerical simulation of coal seam floor failure[J].Coal Geology&Exploration,2013,41(3):55-58.
[17]鲁海峰,姚多喜,胡友彪,等.水压影响下煤层底板采动破坏深度弹性力学解[J].采矿与安全工程学报,2017,34(3):452-458.LU Haifeng,YAO Duoxi,HU Youbiao,et al.Elasticity solution for failure depth of mining floor under water pressure[J].Journal of Mining&Safety Engineering,2017,34(3):452-458.
[18]杜伟升,姜耀东,高林涛.带压开采底板破坏因素分析及突水预测研究[J].煤炭科学技术,2017,45(6):112-117.DU Weisheng,JIANG Yaodong,GAO Lintao.Study on water inrush prediction and floor failure factors analysis in pressurized mining coal[J].Coal Science and Technology,2017,45(6):112-117.
[19]李刚,王海平,苏俊辉.采动影响下的煤层底板岩层破坏特征:以团柏煤矿为例[J].煤田地质与勘探,2012,40(2):59-61.LI Gang,WANG Haiping,SU Junhui.Destruction features in floor caused by mining activity:With Tuanbai mine as example[J].Coal Geology&Exploration,2012,40(2):59-61.
[20]刘伟韬,申建军,贾红果.深井底板采动应力演化规律与破坏特征研究[J].采矿与安全工程学报,2016,33(6):1045-1051.LIU Weitao,SHEN Jianjun,JIA Hongguo.Mining-induced stress evolution law and failure characteristics of floor in deep mine[J].Journal of Mining&Safety Engineering,2016,33(6):1045-1051.
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