千米深井L型钻孔地面预注浆岩体可注性研究
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摘要
以千米深井巷道注浆区域岩体结构分布特征为基础,采用理论分析的方法,结合现有岩体松动压力理论和可注性理论,分析了岩体可注性的影响因素和裂隙岩体渗透的几何参数,利用现场压水试验,统计注浆段地层的单位吸水率,得到吕荣值,对信湖煤矿中央水泵房和变电所注浆加固段岩体的可注性进行评价。分析结果表明,增大岩体的凝聚力和内摩擦角可效降低支护结构承受的松动地压,当岩体的内摩擦角从10°提高到20°时支护结构承受的松动地压降低最显著;所加固段巷道周边岩体的可注性较差,若在巷道开挖施工期采用工作面注浆方法加固围岩,则很难达到预期效果,该研究表明了采用L型钻孔地面预注浆加固围岩的必要性与可行性。
Based on the distribution characteristics of rock mass structure in the grouting area of a kilometer deep mine roadway,using the theoretical analysis method,and the existing rock mass loosening theory and groutability theory,analysis was made of the factors influencing the grouting of rock mass and geometric parameters of seepage in fractured rock masses. The unit water absorption of the grouting section was counted by using the water pressure test in the field to get the Lugeon value with which the groutability of the grouting reinforcement section of the central water pump house and the transformer substation was evaluated of Xinhu coal mine. The analysis results showed that the increase of rock cohesion and internal friction angle could effectively reduce the pressure of supporting structure under a loose rock,when the internal friction angle was enlarged from 10 degrees to 20 degrees,the supporting structure under the loose pressure decreased the most significantly; the groutability of surrounding rock mass of roadway in reinforcement section was poor,it was difficult to achieve the desired effect if the grouting method was used to reinforce the surrounding rock in the construction period of roadway excavation. The research shows the necessity and feasibility of strengthening the surrounding rock with L type borehole surface pre-grouting.
Based on the distribution characteristics of rock mass structure in the grouting area of a kilometer deep mine roadway,using the theoretical analysis method,and the existing rock mass loosening theory and groutability theory,analysis was made of the factors influencing the grouting of rock mass and geometric parameters of seepage in fractured rock masses. The unit water absorption of the grouting section was counted by using the water pressure test in the field to get the Lugeon value with which the groutability of the grouting reinforcement section of the central water pump house and the transformer substation was evaluated of Xinhu coal mine. The analysis results showed that the increase of rock cohesion and internal friction angle could effectively reduce the pressure of supporting structure under a loose rock,when the internal friction angle was enlarged from 10 degrees to 20 degrees,the supporting structure under the loose pressure decreased the most significantly; the groutability of surrounding rock mass of roadway in reinforcement section was poor,it was difficult to achieve the desired effect if the grouting method was used to reinforce the surrounding rock in the construction period of roadway excavation. The research shows the necessity and feasibility of strengthening the surrounding rock with L type borehole surface pre-grouting.
引文
[1]邹光华,张凤岩,宋彦波.巷道过含水断层破碎带的注浆加固技术[J].煤炭科学技术,2010,38(6):50-53.
[2]程桦,蔡海兵,荣传新,等.深立井连接硐室群围岩稳定性分析及支护对策[J].煤炭学报,2011,36(2):261-266.
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[6]李为腾,王琦,李术才,等.深部顶板夹煤层巷道围岩变形破坏机制及控制[J].煤炭学报,2014,39(1):47-56.
[7]李泉新.煤层底板超前注浆加固定向钻孔钻进技术[J].煤炭科学技术,2014,42(1):138-142.
[8]韩玉明.综放工作面回风巷超前预注浆加固技术[J].煤炭科学技术,2013,41(8):42-45.
[9]王从平.千米立井地面预注浆堵水及马头门加固技术[J].建井技术,2011,36(4):4-6.
[10]刘书杰,张基伟.井下巷道围岩加固的地面预注浆工艺研究[J].采矿技术,2013,30(3):53-54.
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[12]WANG F,ZHANG C,WEI S,et al.Whole section anchor-grouting reinforcement technology and its application in underground roadways with loose and fractured surrounding rock[J].Tunnelling&Underground Space Technology,2016,51:133-143.
[13]袁辉,邓昀,蒲朝阳,等.深井巷道围岩L型钻孔地面预注浆加固技术[J].煤炭科学技术,2014,42(7):10-13.
[14]何沐.L型钻孔地面预注浆技术在煤矿井下巷道加固工程中的应用[J].煤炭与化工,2015,38(6):70-72.
[15]安许良.L型钻孔地面预注浆技术在煤矿井下巷道加固工程中的应用[J].煤矿开采,2014,19(1):56-59.
[16]袁辉,邓昀,蒲朝阳,等.L型地面钻孔注浆技术在矿井水害防治中的应用[J].煤炭科学技术,2017,45(4):171-175.
[17]范文,俞茂宏,石耀武,等.围岩塑性松动压力Caquot公式的推广和改进[J].地球科学与环境学报,2003,25(1):33-36.
[18]张顺金.砂砾地层渗透注浆的可注性及应用研究[D].长沙:中南大学,2007.
[19]祝云华,刘新荣,梁宁慧,等.裂隙岩体渗流模型研究现状与展望[J].工程地质学报,2008,16(2):178-183.
[20]宋晓晨,徐卫亚.裂隙岩体渗流概念模型研究[J].岩土力学,2004,25(2):226-232.
[21]刘晓丽,王恩志,王思敬,等.裂隙岩体表征方法及岩体水力学特性研究[J].岩石力学与工程学报,2008,27(9):1 814-1 821.
[22]王旭,晏鄂川.节理岩体结构面连通性研究及其应用[J].岩石力学与工程学报,2005,24(a01):4 905-4 911.
[2]程桦,蔡海兵,荣传新,等.深立井连接硐室群围岩稳定性分析及支护对策[J].煤炭学报,2011,36(2):261-266.
[3]董健涛,何桂良,张光振.深部软岩井筒马头门破坏修复治理技术研究[J].煤炭工程,2009(2):25-27.
[4]王展平,高学东,陈斌,等.注浆法在处理断层带大冒顶区施工中的应用[J].煤炭科学技术,2008,36(6):38-40.
[5]JIANG B,WANG H T,REN Y X,et al.Failure mechanism analysis of support in three soft coal roadways and its control measures[J].Electronic Journal of Geotechnical Engineering,2015,20(1):177-190.
[6]李为腾,王琦,李术才,等.深部顶板夹煤层巷道围岩变形破坏机制及控制[J].煤炭学报,2014,39(1):47-56.
[7]李泉新.煤层底板超前注浆加固定向钻孔钻进技术[J].煤炭科学技术,2014,42(1):138-142.
[8]韩玉明.综放工作面回风巷超前预注浆加固技术[J].煤炭科学技术,2013,41(8):42-45.
[9]王从平.千米立井地面预注浆堵水及马头门加固技术[J].建井技术,2011,36(4):4-6.
[10]刘书杰,张基伟.井下巷道围岩加固的地面预注浆工艺研究[J].采矿技术,2013,30(3):53-54.
[11]MYERS T J,RABINE H,NAUDTS A,et al.Pre-Excavation Grouting of Contact Zone and Rock Formation[J].Chemical Reviews,2009,98(4):1 515-1 562.
[12]WANG F,ZHANG C,WEI S,et al.Whole section anchor-grouting reinforcement technology and its application in underground roadways with loose and fractured surrounding rock[J].Tunnelling&Underground Space Technology,2016,51:133-143.
[13]袁辉,邓昀,蒲朝阳,等.深井巷道围岩L型钻孔地面预注浆加固技术[J].煤炭科学技术,2014,42(7):10-13.
[14]何沐.L型钻孔地面预注浆技术在煤矿井下巷道加固工程中的应用[J].煤炭与化工,2015,38(6):70-72.
[15]安许良.L型钻孔地面预注浆技术在煤矿井下巷道加固工程中的应用[J].煤矿开采,2014,19(1):56-59.
[16]袁辉,邓昀,蒲朝阳,等.L型地面钻孔注浆技术在矿井水害防治中的应用[J].煤炭科学技术,2017,45(4):171-175.
[17]范文,俞茂宏,石耀武,等.围岩塑性松动压力Caquot公式的推广和改进[J].地球科学与环境学报,2003,25(1):33-36.
[18]张顺金.砂砾地层渗透注浆的可注性及应用研究[D].长沙:中南大学,2007.
[19]祝云华,刘新荣,梁宁慧,等.裂隙岩体渗流模型研究现状与展望[J].工程地质学报,2008,16(2):178-183.
[20]宋晓晨,徐卫亚.裂隙岩体渗流概念模型研究[J].岩土力学,2004,25(2):226-232.
[21]刘晓丽,王恩志,王思敬,等.裂隙岩体表征方法及岩体水力学特性研究[J].岩石力学与工程学报,2008,27(9):1 814-1 821.
[22]王旭,晏鄂川.节理岩体结构面连通性研究及其应用[J].岩石力学与工程学报,2005,24(a01):4 905-4 911.