特厚煤层上向分层充填开采顶板移动特征分析
|
摘要
系统分析了特厚煤层上向分层充填开采技术原理及开采工艺,分别建立了特厚煤层"单分层"和"多分层"开采顶板移动特征弹性地基梁模型,通过力学分析给出相应顶板挠曲线计算公式,并基于第一强度理论提出顶板失稳判断条件。根据公格营子煤矿具体条件进行计算,分析表明:单分层内一个开采循环顶板最大下沉86 mm,最大拉应力为0.77 MPa;随着分层的逐渐开采,煤层顶板的下沉值和内部拉应力逐渐增大,所有分层开采完毕后顶板岩层最大下沉值为549 mm,所受最大拉应力为2.25 MPa;开采过程中顶板没有发生破断,稳定性良好。工程实测印证了理论分析的结果。
Through the systematic analysis of the upward slicing filling technology in extra thick coal seam,the special thick seam "single layered"and "multi-layered"elastic foundation beam model were built,which provides a judgment on the instability conditions of the roof under the calculation of roof deflection curve with corresponding mechanical analysis and the first roof strength theory. According to the specific conditions of Gonggeyingzi Coal Mine,the calculated results show that the maximum subsidence of the roof in single layered is 86 mm,and the maximum tensile stress is 0. 77 MPa. With the gradual mining of different layers,they both have an increase,and reach their maximum of 549 mm and 2. 25 MPa after all layers have been excavated. During the mining process,the roof has a good stability and the engineering test results are consistent with the calculation results.
Through the systematic analysis of the upward slicing filling technology in extra thick coal seam,the special thick seam "single layered"and "multi-layered"elastic foundation beam model were built,which provides a judgment on the instability conditions of the roof under the calculation of roof deflection curve with corresponding mechanical analysis and the first roof strength theory. According to the specific conditions of Gonggeyingzi Coal Mine,the calculated results show that the maximum subsidence of the roof in single layered is 86 mm,and the maximum tensile stress is 0. 77 MPa. With the gradual mining of different layers,they both have an increase,and reach their maximum of 549 mm and 2. 25 MPa after all layers have been excavated. During the mining process,the roof has a good stability and the engineering test results are consistent with the calculation results.
引文
[1]闫少宏.特厚煤层大采高综放开采支架外载的理论研究[J].煤炭学报,2009,34(5):590-593.Yan Shaohong.Theory study on the load on support of long wall with top coal caving with great mining height in extra thick coal seam[J].Journal of China Coal Society,2009,34(5):590-593.
[2]孔令海,姜福兴,王存文,等.特厚煤层综放采场支架合理工作阻力研究[J].岩石力学与工程学报,2010,29(11):2312-2318.Kong Linghai,Jiang Fuxing,Wang Cunwen,et al.Study of reasonable working resistance of support in fully-mechanized sublevel caving face in extra-thick coal seam[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(11):2312-2318.
[3]刘金海,姜福兴,王乃国,等.深井特厚煤层综放工作面支承压力分布特征的实测研究[J].煤炭学报,2011,36(S1):18-22.Liu Jinhai,Jiang Fuxing,Wang Naiguo,et al.Survey on abutment pressure distribution of fully mechanized caving face in extra-thick coal seam of deep shaft[J].Journal of China Coal Society,2011,36(S1):18-22.
[4]康天合,柴肇云,李义宝,等.底层大采高综放开采20 m特厚中硬煤层的物理模拟研究[J].岩石力学与工程学报,2007,26(5):1065-1072.Kang Tianhe,Chai Zhaoyun,Li Yibao,et al.Study on physical simulation of full seam mining for a 20 m very thick and medium hard seam by sublevel caving mining with high bottom cutting height[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(5):1065-1072.
[5]王吉生,柴肇云,康天合,等.综放全厚开采20 m特厚中硬煤层数值模拟研究[J].太原理工大学学报,2007,38(2):175-179.Wang Jisheng,Chai Zhaoyun,Kang Tianhe,et al.Numerical simulation of full seam mining for a 20 m very thick and medium hard seam by fully mechanized sub level caving[J].Journal of Taiyuan University of Technology,2007,38(2):175-179.
[6]孔令海,姜福兴,刘杰,等.特厚煤层综放工作面区段煤柱合理宽度的微地震监测[J].煤炭学报,2009,34(7):871-874.Kong Linghai,Jiang Fuxing,Liu Jie,et al.High-precision microseismic monitoring system to reasonable width of segment[J].Journal of China Coal Society,2009,34(7):871-874.
[7]于雷,闫少宏,刘全明,等.特厚煤层综放开采支架工作阻力的确定[J].煤炭学报,2012,37(5):737-742.Yu Lei,Yan Shaohong,Liu Quanming,et al.Determination of support working resistance of top coal caving in extra thick coal seam[J].Journal of China Coal Society,2012,37(5):737-742.
[8]张益东,张付涛,季明,等.特厚煤层合理放煤工艺研究[J].采矿与安全工程学报,2012,29(6):808-814.Zhang Yidong,Zhang Futao,Ji Ming,et al.Research on the reasonable coal caving technological parameters of extra-thick coal seam[J].Journal of Mining&Safety Engineering,2012,29(6):808-814.
[9]周宗红,侯克鹏,任凤玉.分段空场崩落采矿法顶板稳定性分析[J].采矿与安全工程学报,2012,29(4):538-542.Zhou Zonghong,Hou Kepeng,Ren Fengyu.Roof stability analysis of sublevel open stope and caving mining method[J].Journal of Mining&Safety Engineering,2012,29(4):538-542.
[10]鞠文君,李前,魏东,等.急倾斜特厚煤层水平分层开采矿压特征[J].煤炭学报,2006,31(5):558-561.Ju Wenjun,Li Qian,Wei Dong,et al.Pressure character in caving steep-inclined and extremely thick coal seam with horizontally grouped top-coal drawing mining method[J].Journal of China Coal Society,2006,31(5):558-561.
[11]鞠文君,李文洲.急倾斜特厚煤层水平分段开采基本顶断裂力学模型[J].煤炭学报,2008,33(6):606-608.Ju Wenjun,Li Wenzhou.Fracture mechanical model of main roof along inclined for fully-mechanized top-coal caving in steep and extra-thick coal seam[J].Journal of China Coal Society,2008,33(6):606-608.
[12]石平五,高召宁.急斜特厚煤层开采围岩与覆盖层破坏规律[J].煤炭学报,2003,28(1):13-16.Shi Pingwu,Gao Zhaoning.The failure laws of surrounding rocks and over lying bed in the steep special thickness seam mining[J].Journal of China Coal Society,2003,28(1):13-16.
[13]高召宁,石平五,姚裕春,等.急斜特厚煤层开采围岩破坏规律研究[J].矿业研究与开发,2006,26(3):26-28.Gao Zhaoning,Shi Pingwu,Yao Yuchun,et al.Study on failure laws of surrounding rock in the steep dip and extra-thick coal seam mining[J].Mining Research and Development,2006,26(3):26-28.
[14]赵延林,吴启红,王卫军,等.基于突变理论的采空区重叠顶板稳定性强度折减法及应用[J].岩石力学与工程学报,2010,29(7):1424-1434.Zhao Yanlin,Wu Qihong,Wang Weijun,et al.Strength reduction method to study stability of goaf overlapping roof based on catastrophe theory[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(7):1424-1434.
[15]缪协兴,黄艳利,巨峰,等.密实充填采煤的岩层移动理论研究[J].中国矿业大学学报,2012,41(6):863-867.Miao Xiexing,Huang Yanli,Ju Feng,et al.Strata movement theory of dense backfill mining[J].Journal of China University of Mining&Technology,2012,41(6):863-867.
[16]张吉雄.矸石直接充填综采岩层移动控制及其应用研究[D].徐州:中国矿业大学,2008.Zhang Jixiong.Study on strata movement controlling by raw waste backfilling with fully-mechanized coal winning technology and its engineering applications[D].Xuzhou:China University of Mining&Technology,2008.
[17]缪协兴.综合机械化固体充填采煤矿压控制原理与支架受力分析[J].中国矿业大学学报,2010,39(6):795-801.Miao Xiexing.Principle of underground pressure control in fullymechanized coal mining with solid filling and force analysis of mining support[J].Journal of China University of Mining&Technology,2010,39(6):795-801.
[18]Li Jian,Zhang Jixiong,Huang Yanli,et al.An investigation of surface deformation after fully mechanized,solid back fill mining[J].International Journal of Mining Science and Technology,2012,22(4):453-457.
[19]Zhang Jixiong,Zhang Qiang,Huang Yanli,et al.Strata movement controlling effect of waste and fly ash backfillings in fully mechanized coal mining with backfilling face[J].Mining Science and Technology,2011,21(5):721-726.
[20]周跃进,陈勇,张吉雄,等.充填开采充实率控制原理及技术研究[J].采矿与安全工程学报,2012,29(3):351-356.Zhou Yuejin,Chen Yong,Zhang Jixiong,et al.Control principle and technology of final compression ratio of backfilling materials[J].Journal of Mining&Safety Engineering,2012,29(3):351-356.
[2]孔令海,姜福兴,王存文,等.特厚煤层综放采场支架合理工作阻力研究[J].岩石力学与工程学报,2010,29(11):2312-2318.Kong Linghai,Jiang Fuxing,Wang Cunwen,et al.Study of reasonable working resistance of support in fully-mechanized sublevel caving face in extra-thick coal seam[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(11):2312-2318.
[3]刘金海,姜福兴,王乃国,等.深井特厚煤层综放工作面支承压力分布特征的实测研究[J].煤炭学报,2011,36(S1):18-22.Liu Jinhai,Jiang Fuxing,Wang Naiguo,et al.Survey on abutment pressure distribution of fully mechanized caving face in extra-thick coal seam of deep shaft[J].Journal of China Coal Society,2011,36(S1):18-22.
[4]康天合,柴肇云,李义宝,等.底层大采高综放开采20 m特厚中硬煤层的物理模拟研究[J].岩石力学与工程学报,2007,26(5):1065-1072.Kang Tianhe,Chai Zhaoyun,Li Yibao,et al.Study on physical simulation of full seam mining for a 20 m very thick and medium hard seam by sublevel caving mining with high bottom cutting height[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(5):1065-1072.
[5]王吉生,柴肇云,康天合,等.综放全厚开采20 m特厚中硬煤层数值模拟研究[J].太原理工大学学报,2007,38(2):175-179.Wang Jisheng,Chai Zhaoyun,Kang Tianhe,et al.Numerical simulation of full seam mining for a 20 m very thick and medium hard seam by fully mechanized sub level caving[J].Journal of Taiyuan University of Technology,2007,38(2):175-179.
[6]孔令海,姜福兴,刘杰,等.特厚煤层综放工作面区段煤柱合理宽度的微地震监测[J].煤炭学报,2009,34(7):871-874.Kong Linghai,Jiang Fuxing,Liu Jie,et al.High-precision microseismic monitoring system to reasonable width of segment[J].Journal of China Coal Society,2009,34(7):871-874.
[7]于雷,闫少宏,刘全明,等.特厚煤层综放开采支架工作阻力的确定[J].煤炭学报,2012,37(5):737-742.Yu Lei,Yan Shaohong,Liu Quanming,et al.Determination of support working resistance of top coal caving in extra thick coal seam[J].Journal of China Coal Society,2012,37(5):737-742.
[8]张益东,张付涛,季明,等.特厚煤层合理放煤工艺研究[J].采矿与安全工程学报,2012,29(6):808-814.Zhang Yidong,Zhang Futao,Ji Ming,et al.Research on the reasonable coal caving technological parameters of extra-thick coal seam[J].Journal of Mining&Safety Engineering,2012,29(6):808-814.
[9]周宗红,侯克鹏,任凤玉.分段空场崩落采矿法顶板稳定性分析[J].采矿与安全工程学报,2012,29(4):538-542.Zhou Zonghong,Hou Kepeng,Ren Fengyu.Roof stability analysis of sublevel open stope and caving mining method[J].Journal of Mining&Safety Engineering,2012,29(4):538-542.
[10]鞠文君,李前,魏东,等.急倾斜特厚煤层水平分层开采矿压特征[J].煤炭学报,2006,31(5):558-561.Ju Wenjun,Li Qian,Wei Dong,et al.Pressure character in caving steep-inclined and extremely thick coal seam with horizontally grouped top-coal drawing mining method[J].Journal of China Coal Society,2006,31(5):558-561.
[11]鞠文君,李文洲.急倾斜特厚煤层水平分段开采基本顶断裂力学模型[J].煤炭学报,2008,33(6):606-608.Ju Wenjun,Li Wenzhou.Fracture mechanical model of main roof along inclined for fully-mechanized top-coal caving in steep and extra-thick coal seam[J].Journal of China Coal Society,2008,33(6):606-608.
[12]石平五,高召宁.急斜特厚煤层开采围岩与覆盖层破坏规律[J].煤炭学报,2003,28(1):13-16.Shi Pingwu,Gao Zhaoning.The failure laws of surrounding rocks and over lying bed in the steep special thickness seam mining[J].Journal of China Coal Society,2003,28(1):13-16.
[13]高召宁,石平五,姚裕春,等.急斜特厚煤层开采围岩破坏规律研究[J].矿业研究与开发,2006,26(3):26-28.Gao Zhaoning,Shi Pingwu,Yao Yuchun,et al.Study on failure laws of surrounding rock in the steep dip and extra-thick coal seam mining[J].Mining Research and Development,2006,26(3):26-28.
[14]赵延林,吴启红,王卫军,等.基于突变理论的采空区重叠顶板稳定性强度折减法及应用[J].岩石力学与工程学报,2010,29(7):1424-1434.Zhao Yanlin,Wu Qihong,Wang Weijun,et al.Strength reduction method to study stability of goaf overlapping roof based on catastrophe theory[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(7):1424-1434.
[15]缪协兴,黄艳利,巨峰,等.密实充填采煤的岩层移动理论研究[J].中国矿业大学学报,2012,41(6):863-867.Miao Xiexing,Huang Yanli,Ju Feng,et al.Strata movement theory of dense backfill mining[J].Journal of China University of Mining&Technology,2012,41(6):863-867.
[16]张吉雄.矸石直接充填综采岩层移动控制及其应用研究[D].徐州:中国矿业大学,2008.Zhang Jixiong.Study on strata movement controlling by raw waste backfilling with fully-mechanized coal winning technology and its engineering applications[D].Xuzhou:China University of Mining&Technology,2008.
[17]缪协兴.综合机械化固体充填采煤矿压控制原理与支架受力分析[J].中国矿业大学学报,2010,39(6):795-801.Miao Xiexing.Principle of underground pressure control in fullymechanized coal mining with solid filling and force analysis of mining support[J].Journal of China University of Mining&Technology,2010,39(6):795-801.
[18]Li Jian,Zhang Jixiong,Huang Yanli,et al.An investigation of surface deformation after fully mechanized,solid back fill mining[J].International Journal of Mining Science and Technology,2012,22(4):453-457.
[19]Zhang Jixiong,Zhang Qiang,Huang Yanli,et al.Strata movement controlling effect of waste and fly ash backfillings in fully mechanized coal mining with backfilling face[J].Mining Science and Technology,2011,21(5):721-726.
[20]周跃进,陈勇,张吉雄,等.充填开采充实率控制原理及技术研究[J].采矿与安全工程学报,2012,29(3):351-356.Zhou Yuejin,Chen Yong,Zhang Jixiong,et al.Control principle and technology of final compression ratio of backfilling materials[J].Journal of Mining&Safety Engineering,2012,29(3):351-356.
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