巷道受采区采动影响的动态响应规律研究
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摘要
近几年随着矿山开采规模的不断加大,煤层采动引起的巷道应力重新分布,煤层反复采动对下部巷道的稳定性影响和受采动影响巷道的支护问题已日趋突显。
本文通过北辰-200m运输大巷上部煤层回采后对其引起的采动影响进行分析,通过实验室物理力学实验得出巷道围岩参数,运用FLAC3D数值模拟软件,采用9组不同采高、不同垂距的数值模拟方案进行对比分析,得出了巷道变形与煤层采高和巷道与采煤区的垂距关系，计算结果表明：采高和垂距与巷道的变形量成反比关系,且垂距对变形的影啊大于采高对变形的影响；巷道应力的变化是随着煤层开采的推进与远离,有个峰值变化过程,随着煤层回采的远离又逐渐减小；由于巷道倾斜,巷道的塑性区分布特征主要表现在巷道左拱、左帮部及左底角处较为明显.根据巷道的塑性区分布特征可以为巷道支护提供相应的理论依据：倾斜煤层回采过程甲,田于巷道与回采煤层间距较小.底板巷道整体隆起。根据现场实际监测结果可以看出.在煤层回采之前.巷道位移向巷道断面移动.随着回采的推进,巷道整体位移都向着采空区方向移动.与数值模拟结果相同。根据数值模拟和现场实测结果,提出了合理的巷道支护方案,并应用于实际工程。
In recent years as the mining excavation scale increasing, coal seam excavation movement caused the tunnel stress distribution again, coal bed repeatedly excavation movement on the stability of underground tunnel and its supporting problem study became the main key factor to the development of the coal industry.
This paper make a study of the influence on bottom transportation tunnel, which top part of Beichen transportation tunnel which is200m underground.and gets conclusions that tunnel deformation has a connection with the mining height of coal and the vertical distance of mining area, mining height is in inverse proportion with the deformation of tunnel, and vertical distance has more influence on deformation than what mining height get. these conclusions are all on the basis of using FLAC3D as analysis program to analysis the9groups scheme of numerical simulation with different mining height and different vertical distance, and the parameters of tunnel surrounding rock are get from laboratory physical mechanic experiment. Laneway stress reduces by the distance of coal digging getting far. and there is a peak in this change period. Accounting for the inclined of runnel, the characters of the spread of plastic area of tunnel mainly obvious on left arch of tunnel, left working lope of tunnel and left base angle of tunnel. For the spread characteristics of tunnel plastic area can be the theoretical support for tunnel support, we can get clear that, during the period of coal digging, for the short distance between tunnel and digging area, bottom tunnel uplift and even move to the area which is well dig. According to the actual monitoring results can be seen, before coal seam excavation, tunnel displacement move to tunnel section. Based on the numerical simulation and monitoring material, put out an appropriate roadway supporting scheme, and applied to the practical project.
本文通过北辰-200m运输大巷上部煤层回采后对其引起的采动影响进行分析,通过实验室物理力学实验得出巷道围岩参数,运用FLAC3D数值模拟软件,采用9组不同采高、不同垂距的数值模拟方案进行对比分析,得出了巷道变形与煤层采高和巷道与采煤区的垂距关系，计算结果表明：采高和垂距与巷道的变形量成反比关系,且垂距对变形的影啊大于采高对变形的影响；巷道应力的变化是随着煤层开采的推进与远离,有个峰值变化过程,随着煤层回采的远离又逐渐减小；由于巷道倾斜,巷道的塑性区分布特征主要表现在巷道左拱、左帮部及左底角处较为明显.根据巷道的塑性区分布特征可以为巷道支护提供相应的理论依据：倾斜煤层回采过程甲,田于巷道与回采煤层间距较小.底板巷道整体隆起。根据现场实际监测结果可以看出.在煤层回采之前.巷道位移向巷道断面移动.随着回采的推进,巷道整体位移都向着采空区方向移动.与数值模拟结果相同。根据数值模拟和现场实测结果,提出了合理的巷道支护方案,并应用于实际工程。
In recent years as the mining excavation scale increasing, coal seam excavation movement caused the tunnel stress distribution again, coal bed repeatedly excavation movement on the stability of underground tunnel and its supporting problem study became the main key factor to the development of the coal industry.
This paper make a study of the influence on bottom transportation tunnel, which top part of Beichen transportation tunnel which is200m underground.and gets conclusions that tunnel deformation has a connection with the mining height of coal and the vertical distance of mining area, mining height is in inverse proportion with the deformation of tunnel, and vertical distance has more influence on deformation than what mining height get. these conclusions are all on the basis of using FLAC3D as analysis program to analysis the9groups scheme of numerical simulation with different mining height and different vertical distance, and the parameters of tunnel surrounding rock are get from laboratory physical mechanic experiment. Laneway stress reduces by the distance of coal digging getting far. and there is a peak in this change period. Accounting for the inclined of runnel, the characters of the spread of plastic area of tunnel mainly obvious on left arch of tunnel, left working lope of tunnel and left base angle of tunnel. For the spread characteristics of tunnel plastic area can be the theoretical support for tunnel support, we can get clear that, during the period of coal digging, for the short distance between tunnel and digging area, bottom tunnel uplift and even move to the area which is well dig. According to the actual monitoring results can be seen, before coal seam excavation, tunnel displacement move to tunnel section. Based on the numerical simulation and monitoring material, put out an appropriate roadway supporting scheme, and applied to the practical project.
引文
[1]Qiao Chunsheng. Research on the Prediction of Fracture Zone of the Tunnel in Soft and Work Rock Mass. Jian Xinyuan Editor, Rotterdam:A. A. Balkema 1407-1412,1998.
[2]钱鸣高,石平五.矿山压力与岩层控制[M].徐州：中国矿业大学出版社.2003.
[3]刘锋珍,深部高应力巷道围岩稳定性数值模拟研究[D],山东科技大学,2005.
[4]柳崇伟,裂隙岩体巷道稳定性的相关规律研究[D],太原理工大学,2001.
[5]曲天智等,深部巷道围岩位移研究综述[J],煤炭科技,2008年4期：55-58.
[6]Papanastasiou P and Vardoulakis I, Bifurcation analysis of deep boreholes:Ⅱ, Scale effect, Int.J.Number. Anal.amethods, Geomech.13,183-198(1998).
[7]于学馥.轴变论[M].北京.冶金工业出版社.1960.
[8]董方庭等.巷道围岩松动圈支护理论[J].煤炭学报,1994(1)：21-31.
[9]宋宏伟,部志宏,周荣章,董方庭.围岩松动圈巷道支护理论的基本观点[J].建井技术,1994(4、5)：3-9.
[10]董方庭等.中等稳定岩石巷道锚喷支护合理参数的研究及工业试验[J].中国矿业学院学报,1985(2)：49-57.
[11]郭志宏,董方庭.围岩松动圈与巷道支护[J].矿山压力与顶板管理,1995年Z1期：111-114.
[12]靖洪文,付国彬,董方庭.深井巷道围岩松动圈预分类研究[J].中国矿业大学学报,1996,25(2)：45-49.
[13]靖洪文,付国彬等.受采动影响的深井巷道研究与支护实践[J].阜新矿业学院学报(自然科学版),1996,15(1)：15-18.
[14]刘玉棠等.我国缓倾斜煤层回采巷道围岩稳定的研究[J].煤炭学报,1988(3).
[15]U. S. Department of the Interior Bureau of Mines[J]. Field Investigation of Coal Mine Opening Stability,1988.
[16]Watersik, W. R. A study of britle rock fracture in laboratary compression experiments[J]. Int.J., Rock mechenics science,1979.
[17]Rabcewicz L. von. Stablity of Tunnels Under Rock Load[J]. Water Power, No. 1.1964.
[18]陈炎光,陆士良.中国煤矿巷道围岩控制[M].北京：中国矿业大学出版社, 1994.
[19]陆士良,付国彬,汤雷.采动巷道岩体变形与锚杆锚固力变化规律[J].中国矿业大学学报,1999,28(3)：201-203.
[20]钱鸣高,缪协兴.采场砌体梁结构的关键块分析[J].煤炭学报,1994,19(6)：557-563.
[21]钱鸣高,缪协兴.采场上覆岩结构的形成与受力分析[J].岩石力学与工程学报,1995,14(2)：97-106.
[22]钱鸣高,缪协兴.岩层控制中关键层的理论研究[J].煤炭学报,1996,21(3)：225-230.
[23]茅献彪.缪协兴.钱鸣高.采动覆岩中关健层的破断规律研究[J]中国矿业大学学报,1998.27(1)：39-42
[24]浦海,缪协兴.采动覆岩中关键层运动对围岩支承压力分布的影响[J].岩石力学与工程学报,2002.21(增2)：2366-2369.
[25]文志杰,朱永鹏,刘崇凌.中厚煤层回采巷道变形机理及其力学模型建立[J].解放军理工大学学报(自然科学版),2009(12)：615-617.
[26]庞凤岭.动压巷道支护技术探讨[J].煤炭科学技术,2006,34(3)：76-78.
[27]王观宇.采动岩层内部的移动与变形分析[J].矿山测量,1995,19(1)：19-22.
[28]张茂林等.大阳煤矿综放回采巷道采动影响变形规律研究[J].煤炭科学技术,2007,35(8)：35-38.
[29]郜进海,康天合,靳钟铭.巨厚薄层状顶板回采巷道围岩裂隙演化规律的相似模拟试验研究[J].岩石力学与工程学报,2004,23(19)：3292-3297.
[30]付国彬,徐金海.深井底板岩巷的围岩破裂范围[J].矿山压力与顶板管理,1996,13(4)：40-42.
[31]王悦汉,邓喀中等.采动岩体动态力学模型[J].岩石力学与工程学报,2003,22(3)：352-357.
[32]谭云亮.受采动影响巷道两帮破坏范围探测研究[J].煤炭科学技术,1999,27(3)：39-41.
[33]高明中,黄殿武.底板软岩动压巷道围岩应力分布的数值分析[J].安徽理工大学学报,2003,23(3)：14-18.
[34]谢文兵,史振凡,陈晓祥,等.工作面回采对底板岩巷稳定性的影响[J].中国矿业大学学报,2003,33(1)：82-85.
[35]Tang C A. Kbaiser P K. Numerical simulation of cumulative damage and seismic energy in unstable failure of brittle rock Part I. Fund amentals [J]. Int. J. Rock Mech. Min. Sci.1998.35(2):113-121.
[36]TangCA. Numerical simulation on progressive failure leading to collapse and associated seismically[J]. Int. J. Rock Mech. Min. Sci.1997.34(2):249-261.
[37]郑百生,谢文兵,陈晓祥,等.跨采对影响底板岩巷稳定性的数值分析[J].矿山压力与顶板管理,2004,21(1)：34-37.
[38]A. H Wilson. The Stability of Tunnels in Soft Rock at Depth. Proc. Conf. on Rock Engineer, Uniersity of Newcasaleupon Tyne.511-515(1977).
[39]A. HWilson. A Method of Estimating the Closure and Strength of Lining Required in Drivages Surrounding by a Yield Zone. Int. J. Rock Meth. Sci.17, 349-355(1980).
[40]C. wang,Y. wang, S. lu. Deformational behaviors of roadways in soft rocks in underground coal mines and prickles for stability control, international journal of rock mechanics and mining sciences,2000,37(6):937-946.
[41]刘红元,刘建新,唐春安.采动影响下覆岩跨落过程的数值模拟[J].岩土工程学报,2001,23(2)：201-204.
[42]李世辉.锚喷支护分析预测的典型类比分析法[J].煤炭学报,1994.(1)：33-38.
[43]柯勇,吕玉勇,彭道强.金属矿山巷道支护综述[J],科技信息.,高校理科研究99-101.
[44]韩瑞庚,地下工程新奥法[M],北京：科学出版社,1987.
[45]E.T. Brown.Puting the NATM into Perspective[J].Tunnels and Tunneling,1990.
[46]杨春丽,金川二矿区深部巷道支护技术研究[D],昆明理工大学,2006.3.
[47]王海东,高应力松软煤层回采巷道锚网索支护研究[D],辽宁工程技术大学,2005.12.
[48]何满潮.煤矿软岩巷道支护理论与实践[M].中国矿业大学出版社,1996.8.
[49]何满潮,景海河，孙晓明.软岩工程力学[M],北京：科学出版社,2002.
[50]于学馥,乔端.轴变论和围岩稳定轴比三规律[J].有色金属,1981(8)：21-25.
[51]于学馥.岩石记忆与开挖理论[M].北京：冶金工业出版社,1993.
[52]何满潮.软岩巷道工程概论[M].徐州：中国矿业大学出版社,1993.
[53]朱维中.大变形巷道的锚喷技术研究[J].矿山压力与顶板管理,1993.2：15-17
[54]程桦，孙钧.软弱围岩复合式隧道衬砌力学机理非线性大变形数值分析[J].岩石力学与工程学报,1997,4：327-336
[55]郝哲,刘斌.基于差分法及神经网络的硐室围岩力学参数反分析[J].岩土力学,2003,24(增刊)：77-79.
[56]朱维申,何满潮.复杂条件下围岩稳定性与岩体动态施工力学[M].北京：科学出版社,1995,7.
[57]李明远,王连国,陆维汉等.软岩巷道锚注支护理论与实践[M],煤炭工业出版社,2001.
[58]宋广太,魏锦平,张榜雄.煤巷围岩锚固技术与工程实践[M],煤炭工业出版社,2006.
[59]窦林名,邹喜正,曹胜根,陆莱平.煤矿围岩控制与监测[M],年中国矿业大学出版社,2007.
[60]薛顺勋，聂光国,姜光杰等.软岩巷道支护技术指南[M].煤炭工业出版社,2002.
[61]韩军,丁秀丽,朱杰兵.岩土锚固技术的新进展[J].长江科学院院报,2001,18(5)：65-67.
[62]毛光宁.美国锚杆支护综述[M].中国煤炭出版社,2001年.
[63]姜福兴.矿山压力及岩层控制[M],煤炭工业出版社,2004年.
[2]钱鸣高,石平五.矿山压力与岩层控制[M].徐州：中国矿业大学出版社.2003.
[3]刘锋珍,深部高应力巷道围岩稳定性数值模拟研究[D],山东科技大学,2005.
[4]柳崇伟,裂隙岩体巷道稳定性的相关规律研究[D],太原理工大学,2001.
[5]曲天智等,深部巷道围岩位移研究综述[J],煤炭科技,2008年4期：55-58.
[6]Papanastasiou P and Vardoulakis I, Bifurcation analysis of deep boreholes:Ⅱ, Scale effect, Int.J.Number. Anal.amethods, Geomech.13,183-198(1998).
[7]于学馥.轴变论[M].北京.冶金工业出版社.1960.
[8]董方庭等.巷道围岩松动圈支护理论[J].煤炭学报,1994(1)：21-31.
[9]宋宏伟,部志宏,周荣章,董方庭.围岩松动圈巷道支护理论的基本观点[J].建井技术,1994(4、5)：3-9.
[10]董方庭等.中等稳定岩石巷道锚喷支护合理参数的研究及工业试验[J].中国矿业学院学报,1985(2)：49-57.
[11]郭志宏,董方庭.围岩松动圈与巷道支护[J].矿山压力与顶板管理,1995年Z1期：111-114.
[12]靖洪文,付国彬,董方庭.深井巷道围岩松动圈预分类研究[J].中国矿业大学学报,1996,25(2)：45-49.
[13]靖洪文,付国彬等.受采动影响的深井巷道研究与支护实践[J].阜新矿业学院学报(自然科学版),1996,15(1)：15-18.
[14]刘玉棠等.我国缓倾斜煤层回采巷道围岩稳定的研究[J].煤炭学报,1988(3).
[15]U. S. Department of the Interior Bureau of Mines[J]. Field Investigation of Coal Mine Opening Stability,1988.
[16]Watersik, W. R. A study of britle rock fracture in laboratary compression experiments[J]. Int.J., Rock mechenics science,1979.
[17]Rabcewicz L. von. Stablity of Tunnels Under Rock Load[J]. Water Power, No. 1.1964.
[18]陈炎光,陆士良.中国煤矿巷道围岩控制[M].北京：中国矿业大学出版社, 1994.
[19]陆士良,付国彬,汤雷.采动巷道岩体变形与锚杆锚固力变化规律[J].中国矿业大学学报,1999,28(3)：201-203.
[20]钱鸣高,缪协兴.采场砌体梁结构的关键块分析[J].煤炭学报,1994,19(6)：557-563.
[21]钱鸣高,缪协兴.采场上覆岩结构的形成与受力分析[J].岩石力学与工程学报,1995,14(2)：97-106.
[22]钱鸣高,缪协兴.岩层控制中关键层的理论研究[J].煤炭学报,1996,21(3)：225-230.
[23]茅献彪.缪协兴.钱鸣高.采动覆岩中关健层的破断规律研究[J]中国矿业大学学报,1998.27(1)：39-42
[24]浦海,缪协兴.采动覆岩中关键层运动对围岩支承压力分布的影响[J].岩石力学与工程学报,2002.21(增2)：2366-2369.
[25]文志杰,朱永鹏,刘崇凌.中厚煤层回采巷道变形机理及其力学模型建立[J].解放军理工大学学报(自然科学版),2009(12)：615-617.
[26]庞凤岭.动压巷道支护技术探讨[J].煤炭科学技术,2006,34(3)：76-78.
[27]王观宇.采动岩层内部的移动与变形分析[J].矿山测量,1995,19(1)：19-22.
[28]张茂林等.大阳煤矿综放回采巷道采动影响变形规律研究[J].煤炭科学技术,2007,35(8)：35-38.
[29]郜进海,康天合,靳钟铭.巨厚薄层状顶板回采巷道围岩裂隙演化规律的相似模拟试验研究[J].岩石力学与工程学报,2004,23(19)：3292-3297.
[30]付国彬,徐金海.深井底板岩巷的围岩破裂范围[J].矿山压力与顶板管理,1996,13(4)：40-42.
[31]王悦汉,邓喀中等.采动岩体动态力学模型[J].岩石力学与工程学报,2003,22(3)：352-357.
[32]谭云亮.受采动影响巷道两帮破坏范围探测研究[J].煤炭科学技术,1999,27(3)：39-41.
[33]高明中,黄殿武.底板软岩动压巷道围岩应力分布的数值分析[J].安徽理工大学学报,2003,23(3)：14-18.
[34]谢文兵,史振凡,陈晓祥,等.工作面回采对底板岩巷稳定性的影响[J].中国矿业大学学报,2003,33(1)：82-85.
[35]Tang C A. Kbaiser P K. Numerical simulation of cumulative damage and seismic energy in unstable failure of brittle rock Part I. Fund amentals [J]. Int. J. Rock Mech. Min. Sci.1998.35(2):113-121.
[36]TangCA. Numerical simulation on progressive failure leading to collapse and associated seismically[J]. Int. J. Rock Mech. Min. Sci.1997.34(2):249-261.
[37]郑百生,谢文兵,陈晓祥,等.跨采对影响底板岩巷稳定性的数值分析[J].矿山压力与顶板管理,2004,21(1)：34-37.
[38]A. H Wilson. The Stability of Tunnels in Soft Rock at Depth. Proc. Conf. on Rock Engineer, Uniersity of Newcasaleupon Tyne.511-515(1977).
[39]A. HWilson. A Method of Estimating the Closure and Strength of Lining Required in Drivages Surrounding by a Yield Zone. Int. J. Rock Meth. Sci.17, 349-355(1980).
[40]C. wang,Y. wang, S. lu. Deformational behaviors of roadways in soft rocks in underground coal mines and prickles for stability control, international journal of rock mechanics and mining sciences,2000,37(6):937-946.
[41]刘红元,刘建新,唐春安.采动影响下覆岩跨落过程的数值模拟[J].岩土工程学报,2001,23(2)：201-204.
[42]李世辉.锚喷支护分析预测的典型类比分析法[J].煤炭学报,1994.(1)：33-38.
[43]柯勇,吕玉勇,彭道强.金属矿山巷道支护综述[J],科技信息.,高校理科研究99-101.
[44]韩瑞庚,地下工程新奥法[M],北京：科学出版社,1987.
[45]E.T. Brown.Puting the NATM into Perspective[J].Tunnels and Tunneling,1990.
[46]杨春丽,金川二矿区深部巷道支护技术研究[D],昆明理工大学,2006.3.
[47]王海东,高应力松软煤层回采巷道锚网索支护研究[D],辽宁工程技术大学,2005.12.
[48]何满潮.煤矿软岩巷道支护理论与实践[M].中国矿业大学出版社,1996.8.
[49]何满潮,景海河，孙晓明.软岩工程力学[M],北京：科学出版社,2002.
[50]于学馥,乔端.轴变论和围岩稳定轴比三规律[J].有色金属,1981(8)：21-25.
[51]于学馥.岩石记忆与开挖理论[M].北京：冶金工业出版社,1993.
[52]何满潮.软岩巷道工程概论[M].徐州：中国矿业大学出版社,1993.
[53]朱维中.大变形巷道的锚喷技术研究[J].矿山压力与顶板管理,1993.2：15-17
[54]程桦，孙钧.软弱围岩复合式隧道衬砌力学机理非线性大变形数值分析[J].岩石力学与工程学报,1997,4：327-336
[55]郝哲,刘斌.基于差分法及神经网络的硐室围岩力学参数反分析[J].岩土力学,2003,24(增刊)：77-79.
[56]朱维申,何满潮.复杂条件下围岩稳定性与岩体动态施工力学[M].北京：科学出版社,1995,7.
[57]李明远,王连国,陆维汉等.软岩巷道锚注支护理论与实践[M],煤炭工业出版社,2001.
[58]宋广太,魏锦平,张榜雄.煤巷围岩锚固技术与工程实践[M],煤炭工业出版社,2006.
[59]窦林名,邹喜正,曹胜根,陆莱平.煤矿围岩控制与监测[M],年中国矿业大学出版社,2007.
[60]薛顺勋，聂光国,姜光杰等.软岩巷道支护技术指南[M].煤炭工业出版社,2002.
[61]韩军,丁秀丽,朱杰兵.岩土锚固技术的新进展[J].长江科学院院报,2001,18(5)：65-67.
[62]毛光宁.美国锚杆支护综述[M].中国煤炭出版社,2001年.
[63]姜福兴.矿山压力及岩层控制[M],煤炭工业出版社,2004年.