基于采动影响下塑性区演化的顶板稳定性控制
|
摘要
回采巷道围岩塑性区分布特征是围岩稳定性控制的关键。针对双巷布置条件下留巷易受到相邻工作面采动影响的特点,以塔拉壕矿为研究背景,采用FLAC3D数值模拟和理论计算的方法研究了采动影响下留巷的应力分布、塑性区演化、支护阻力对塑性区的控制作用。结果表明:1)留巷位置应力分布随推进尺寸而增加,最终趋于稳定,且对称分布;2)留巷位置侧压系数随工作面推进度而减小,最终趋于稳定,且对称分布;3)留巷塑性区由超前150 m到滞后200 m逐渐加大且由对称分布演化为非对称性分布;4)在现有条件下加强支护阻力减小围岩塑性区的作用有限。基于塑性区形态演化设计锚杆(索)支护参数进行巷道稳定性控制,并应用于现场实际,经过现场实测和数据分析,得出基于塑性区演化的顶板稳定性控制效果良好。
The retained entry in double-roadway layout is easy to be affected by the mining of adjacent working face. Based on data of Talahao coalmine, the retained entry stress distribution, the plastic zone evolution and the control effect of support resistance on plastic zone were investigated using, FLAC3 D numerical simulation and theoretical calculation. Results indicate that: 1) The stress distribution of retained entry rises with the increasing advancing size. Meanwhile, stress eventually tends to be stable and symmetrically distributed; 2) The side pressure coefficient of retained entry decreases with the increasing advancing size. It also tends to be stable and symmetrically distributed; 3) The plastic zone of retained entry gradually increases from advancing of 150 m to lagging of 200 m, and evolves from a symmetric distribution to an asymmetric distribution; 4) Under current conditions, strengthening support resistance plays a limited role in reducing plastic zone of surrounding rock. Based on plastic zone morphological evolution, anchor(cable) support parameters for roadway stability control were determined and applied in coalmine. Through field measurements and data analysis, the roof stability control methods based on plastic zone evolution are effective.
The retained entry in double-roadway layout is easy to be affected by the mining of adjacent working face. Based on data of Talahao coalmine, the retained entry stress distribution, the plastic zone evolution and the control effect of support resistance on plastic zone were investigated using, FLAC3 D numerical simulation and theoretical calculation. Results indicate that: 1) The stress distribution of retained entry rises with the increasing advancing size. Meanwhile, stress eventually tends to be stable and symmetrically distributed; 2) The side pressure coefficient of retained entry decreases with the increasing advancing size. It also tends to be stable and symmetrically distributed; 3) The plastic zone of retained entry gradually increases from advancing of 150 m to lagging of 200 m, and evolves from a symmetric distribution to an asymmetric distribution; 4) Under current conditions, strengthening support resistance plays a limited role in reducing plastic zone of surrounding rock. Based on plastic zone morphological evolution, anchor(cable) support parameters for roadway stability control were determined and applied in coalmine. Through field measurements and data analysis, the roof stability control methods based on plastic zone evolution are effective.
引文
[1]钱鸣高,石平五,许家林.矿山压力与岩层控制[M].中国矿业大学出版社,2010:49-52
[2]康红普,颜立新,郭相平,等.回采工作面多巷布置留巷围岩变形特征与支护技术[J].岩石力学与工程学报,2012,31(10):2022-2036.KANG Hongpu,YAN Lixin,GUO Xiangping,et al.Characteristics of surrounding rock deformation and reinforcement technology of retained entry in working face with multientry layout[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(10):2022-2036.
[3]王书文,毛德兵,潘俊锋,等.采空区侧向支承压力演化及微震活动全过程实测研究[J].煤炭学报,2015,40(12):2772-2779.WANG Shuwen,MAO Debing,PAN Junfeng,et al.Measure ment on the whole process of abutment pressure evolution and microseismic activities at the lateral strata of goaf[J].Journal of China Coal Society,2015,40(12):2772-2779.
[4]刘杰,王恩元,赵恩来,等.深部工作面采动应力场分布变化规律实测研究[J].采矿与安全工程学报,2014,31(01):60-65.LIU Jie,WANG Enyuan,ZHAO Enlai,et al.Distribution and variation of mining induced stress field in deep workface[J].Journal of Mining&Safety Engineering,2014,31(01):60-65.
[5]余学义,王琦,赵兵朝,等.大采高双巷布置工作面巷间煤柱合理宽度研究[J].岩石力学与工程学报,2015,34(增刊1):3328-3336.YU Xueyi,WANG Qi,ZHAO Bingchao,et al.Study on reasonable width of pillar between roadways in large mining height face with double roadways layout[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(Sup1):3328-3336.
[6]牛双建,靖洪文.深井巷道围岩主应力差演化规律物理模拟研究[J].岩石力学与工程学报,2012,31(增刊2):3811-3820.NIU Shuangjian,JING Hongwen.Physical simulation study of principal stress difference evolution law of surrounding rock of deep mine roadways[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(Sup 2):3811-3820.
[7]李元鑫,朱哲明,范君黎.主应力方向对围岩稳定性的影响[J].岩土工程学报,2014,36(10):1908-1914.LI Yuanxin,ZHU Zheming,FAN Junli.Effect of principal stress orientation on stability of surrounding rock of tunnels[J].Journal of Applied Mathematics and Mechanics,2014,36(10):1908-1914.
[8]赵海军,马凤山,丁德民,等.采动影响下巷道变形机理与破坏模式[J].煤炭学报,2009,34(05):599-604.ZHAO Haijun,MA Fengshan,DING Demin,et al.Roadway deformation mechanism and failure model under the influence of mining[J].Journal of China Coal Society,2009,34(05):599-604.
[9]王卫军,袁超,余伟健,等.深部大变形巷道围岩稳定性控制方法研究[J].煤炭学报,2016,41(12):2921-2931.WANG Weijun,YUAN Chao,YU Weijian,et al.Stability control method of surrounding rock in deep roadway with large deformation[J].Journal of China Coal Society,2016,41(12):2921-2931.
[10]李永恩,郭晓菲,马骥,等.邢东矿深部回采巷道围岩塑性区“蝶形”扩展特征及稳定性控制[J].矿业科学学报,2017,2(6):566-575.LI Yongen,GUO Xiaofei,MA Ji,et al.Extension characteristics of the“Butterfly-shaped”plastic zone and stability control of deep mining roadway in Xingdong mine[J].Journal of Mining Science and Technology,2017,2(6):566-575.
[11]赵志强.大变形回采巷道围岩变形破坏机理与控制方法研究[D].北京:中国矿业大学(北京),2014.
[12]刘洪涛,吴祥业,镐振,等.双巷布置工作面留巷塑性区演化规律及稳定控制[J].采矿与安全工程学报,2017,34(4):689-697.LIU Hongtao,WU Xiangye,HAO Zhen,et al.Evolution law and stability control of plastic zones of retained entry of working face with double roadways layout[J].Journal of Mining&Safety Engineering,2017,34(4):689-697.
[13]李季,马念杰,丁自伟.基于主应力方向改变的深部沿空巷道非均匀大变形机理及稳定性控制[J].采矿与安全工程学报,2018,35(4):670-676.LI Ji,MA Nianjie,DING Ziwei.Heterogeneous large deformation mechanism based on change of principal stress direction in deep gob side entry and control[J].Journal of Mining&Safety Engineering,2018,35(4):670-676.
[14]马念杰,赵希栋,赵志强,等.深部采动巷道顶板稳定性分析与控制[J].煤炭学报,2015,40(10):2287-2295.MA Nianjie,ZHAO Xidong,ZHAO Zhiqiang,et al.Stability analysis and control technology of mine roadway roof in deep mining[J].Journal of China Coal Society,2015,40(10):2287-2295.
[15]马念杰,李季,赵志强.圆形巷道围岩偏应力场及塑性区分布规律研究[J].中国矿业大学报,2015,44(2):206-213.MA Nianjie,LI Ji,ZHAO Zhiqiang.Distribution of the deviatoric stress field and plastic zone in circular roadway surrounding rock[J].Journal of China University of Mining&Technology,2015,44(2):206-213.
[16]郭晓菲,马念杰,赵希栋,等.圆形巷道围岩塑性区的一般形态及其判定准则[J].煤炭学报,2016,41(8):1871-1877.GUO Xiaofei,MA Nianjie,ZHAO Xidong,et al.General shapes and criterion for surrounding rock mass plastic zone of round roadway[J].Journal of China Coal Society,2016,41(8):1871-1877.
[17]马念杰,郭晓菲,赵志强,等.均质圆形巷道蝶型冲击地压发生机理及其判定准则[J].煤炭学报,2016,41(11):2679-2688.MA Nianjie,GUO Xiaofei,ZHAO Zhiqiang,et al.Occurrence mechanisms and judging criterion on circular tunnel butterfly rock burst in homogeneous medium[J].Journal of China Coal Society,2016,41(11):2679-2688.
[18]蔡美峰.岩石力学与工程[M].科学出版社,2013:9-13
[19]杨超,陆士良,姜耀东.支护阻力对不同岩性围岩变形的控制作用[J].中国矿业大学学报,2000,29(2):170-173.YANG Chao,LU Shiliang,JIANG Yaodong.The controlling effect of support resistance on the defor-mation of surrounding rock with different lithology[J].Journal of China University of Mining&Technology,2000,29(2):170-173.
[20]林崇德,陆士良,史元伟.煤巷软弱顶板锚杆支护作用的研究[J].煤炭学报,2000,25(5):482-485.LIN Chongde,LU Shiliang,SHI Yuanwei.Study onsupporting effect of soft roof bolt in coal roadway[J].Journal of China Coal Society,2000,25(5):482-485.
[21]张继华,王连国,朱双双,等.松散软岩巷道围岩塑性区扩展分析及支护实践[J].采矿与安全工程学报,2015,32(3):433-438.ZHANG Jihua,WANG Lianguo,ZHU Shuangshuang,et al.Mechanical analysis of the plastic zones propagation of loose soft rock roadway and the supporting practice[J].Journal of Mining&Safety Engineering,2015,32(3):433-438.
[2]康红普,颜立新,郭相平,等.回采工作面多巷布置留巷围岩变形特征与支护技术[J].岩石力学与工程学报,2012,31(10):2022-2036.KANG Hongpu,YAN Lixin,GUO Xiangping,et al.Characteristics of surrounding rock deformation and reinforcement technology of retained entry in working face with multientry layout[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(10):2022-2036.
[3]王书文,毛德兵,潘俊锋,等.采空区侧向支承压力演化及微震活动全过程实测研究[J].煤炭学报,2015,40(12):2772-2779.WANG Shuwen,MAO Debing,PAN Junfeng,et al.Measure ment on the whole process of abutment pressure evolution and microseismic activities at the lateral strata of goaf[J].Journal of China Coal Society,2015,40(12):2772-2779.
[4]刘杰,王恩元,赵恩来,等.深部工作面采动应力场分布变化规律实测研究[J].采矿与安全工程学报,2014,31(01):60-65.LIU Jie,WANG Enyuan,ZHAO Enlai,et al.Distribution and variation of mining induced stress field in deep workface[J].Journal of Mining&Safety Engineering,2014,31(01):60-65.
[5]余学义,王琦,赵兵朝,等.大采高双巷布置工作面巷间煤柱合理宽度研究[J].岩石力学与工程学报,2015,34(增刊1):3328-3336.YU Xueyi,WANG Qi,ZHAO Bingchao,et al.Study on reasonable width of pillar between roadways in large mining height face with double roadways layout[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(Sup1):3328-3336.
[6]牛双建,靖洪文.深井巷道围岩主应力差演化规律物理模拟研究[J].岩石力学与工程学报,2012,31(增刊2):3811-3820.NIU Shuangjian,JING Hongwen.Physical simulation study of principal stress difference evolution law of surrounding rock of deep mine roadways[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(Sup 2):3811-3820.
[7]李元鑫,朱哲明,范君黎.主应力方向对围岩稳定性的影响[J].岩土工程学报,2014,36(10):1908-1914.LI Yuanxin,ZHU Zheming,FAN Junli.Effect of principal stress orientation on stability of surrounding rock of tunnels[J].Journal of Applied Mathematics and Mechanics,2014,36(10):1908-1914.
[8]赵海军,马凤山,丁德民,等.采动影响下巷道变形机理与破坏模式[J].煤炭学报,2009,34(05):599-604.ZHAO Haijun,MA Fengshan,DING Demin,et al.Roadway deformation mechanism and failure model under the influence of mining[J].Journal of China Coal Society,2009,34(05):599-604.
[9]王卫军,袁超,余伟健,等.深部大变形巷道围岩稳定性控制方法研究[J].煤炭学报,2016,41(12):2921-2931.WANG Weijun,YUAN Chao,YU Weijian,et al.Stability control method of surrounding rock in deep roadway with large deformation[J].Journal of China Coal Society,2016,41(12):2921-2931.
[10]李永恩,郭晓菲,马骥,等.邢东矿深部回采巷道围岩塑性区“蝶形”扩展特征及稳定性控制[J].矿业科学学报,2017,2(6):566-575.LI Yongen,GUO Xiaofei,MA Ji,et al.Extension characteristics of the“Butterfly-shaped”plastic zone and stability control of deep mining roadway in Xingdong mine[J].Journal of Mining Science and Technology,2017,2(6):566-575.
[11]赵志强.大变形回采巷道围岩变形破坏机理与控制方法研究[D].北京:中国矿业大学(北京),2014.
[12]刘洪涛,吴祥业,镐振,等.双巷布置工作面留巷塑性区演化规律及稳定控制[J].采矿与安全工程学报,2017,34(4):689-697.LIU Hongtao,WU Xiangye,HAO Zhen,et al.Evolution law and stability control of plastic zones of retained entry of working face with double roadways layout[J].Journal of Mining&Safety Engineering,2017,34(4):689-697.
[13]李季,马念杰,丁自伟.基于主应力方向改变的深部沿空巷道非均匀大变形机理及稳定性控制[J].采矿与安全工程学报,2018,35(4):670-676.LI Ji,MA Nianjie,DING Ziwei.Heterogeneous large deformation mechanism based on change of principal stress direction in deep gob side entry and control[J].Journal of Mining&Safety Engineering,2018,35(4):670-676.
[14]马念杰,赵希栋,赵志强,等.深部采动巷道顶板稳定性分析与控制[J].煤炭学报,2015,40(10):2287-2295.MA Nianjie,ZHAO Xidong,ZHAO Zhiqiang,et al.Stability analysis and control technology of mine roadway roof in deep mining[J].Journal of China Coal Society,2015,40(10):2287-2295.
[15]马念杰,李季,赵志强.圆形巷道围岩偏应力场及塑性区分布规律研究[J].中国矿业大学报,2015,44(2):206-213.MA Nianjie,LI Ji,ZHAO Zhiqiang.Distribution of the deviatoric stress field and plastic zone in circular roadway surrounding rock[J].Journal of China University of Mining&Technology,2015,44(2):206-213.
[16]郭晓菲,马念杰,赵希栋,等.圆形巷道围岩塑性区的一般形态及其判定准则[J].煤炭学报,2016,41(8):1871-1877.GUO Xiaofei,MA Nianjie,ZHAO Xidong,et al.General shapes and criterion for surrounding rock mass plastic zone of round roadway[J].Journal of China Coal Society,2016,41(8):1871-1877.
[17]马念杰,郭晓菲,赵志强,等.均质圆形巷道蝶型冲击地压发生机理及其判定准则[J].煤炭学报,2016,41(11):2679-2688.MA Nianjie,GUO Xiaofei,ZHAO Zhiqiang,et al.Occurrence mechanisms and judging criterion on circular tunnel butterfly rock burst in homogeneous medium[J].Journal of China Coal Society,2016,41(11):2679-2688.
[18]蔡美峰.岩石力学与工程[M].科学出版社,2013:9-13
[19]杨超,陆士良,姜耀东.支护阻力对不同岩性围岩变形的控制作用[J].中国矿业大学学报,2000,29(2):170-173.YANG Chao,LU Shiliang,JIANG Yaodong.The controlling effect of support resistance on the defor-mation of surrounding rock with different lithology[J].Journal of China University of Mining&Technology,2000,29(2):170-173.
[20]林崇德,陆士良,史元伟.煤巷软弱顶板锚杆支护作用的研究[J].煤炭学报,2000,25(5):482-485.LIN Chongde,LU Shiliang,SHI Yuanwei.Study onsupporting effect of soft roof bolt in coal roadway[J].Journal of China Coal Society,2000,25(5):482-485.
[21]张继华,王连国,朱双双,等.松散软岩巷道围岩塑性区扩展分析及支护实践[J].采矿与安全工程学报,2015,32(3):433-438.ZHANG Jihua,WANG Lianguo,ZHU Shuangshuang,et al.Mechanical analysis of the plastic zones propagation of loose soft rock roadway and the supporting practice[J].Journal of Mining&Safety Engineering,2015,32(3):433-438.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |