淋水软弱巷道注浆加固扩散机理与参数优化的研究
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摘要
为了研究淋水软弱巷道注浆加固与封堵围岩过程中浆液渗透扩散机理并优化注浆参数,采用流固耦合数值分析方法探索浆液在岩体中的运动扩散规律,并给出合理注浆压力、时间与浆液水灰比;基于弹塑性与渗流理论分析水渗透压作用下注浆加固半径与塑性区大小关系,确定合理注浆深度。研究结果表明:高水黏度时变特性浆液在岩体中的扩散范围随着压力、水灰比和注浆时间增加而增大,针对石碣峪矿井地质生产条件,合理注浆压力为2.5 MPa,水灰比为2∶1,注浆时间约为30 min;随注浆半径增大塑性区半径减小,但减幅变小,得出合理注浆半径约为10.29 m;在注浆半径5.5 m、渗流压力0.5 MPa下,巷道围岩塑性区半径为2.84 m,大于无渗流塑性区半径2.10 m;在深孔锚索注浆治理淋水软弱巷道中采用优化后的注浆参数,取得了良好的效果。
In order to study the penetration,diffusion mechanism and parameter optimization in the process of grouting reinforcement and sealing of drenching and soft roadway,firstly,the fluid-solid coupling numerical analyses were applied to explore the principle of slurry motion and diffusion in the rock mass,and the reasonable grouting pressure,time and water-cement ratio were given.Then based on the elastic-plastic and seepage theory,the relationship of grouting reinforcement radius and size of plastic zone was analyzed under the osmotic pressure to determine reasonable grouting depth.Research results showed that:Diffusion range of high-water viscosity time-dependent slurry increased with the grouting pressure,water-cement ratio and time in the rock mass,and the reasonable grouting pressure was 2.5 MPa; water-cement ratio was 2∶1; grouting time was about 30 min under geological conditions of the SXJ production.The radius of plastic zone decreased with the increase of grouting radius but the decrement become low,it concluded that the reasonable grouting radius was about 10.29 m.The radius of the plastic zone around the roadway under the osmotic pressure of 0.5 MPa and the grouting raduis of 5.5 m was 2.84 m greater than the radius of 2.10 m under non-seepage pressure.The optimized grouting parameters were applied to the treatment of surrounding rock of drenching and soft roadway using deep-hole anchorage grouting technology,and the good results had been achieved.
In order to study the penetration,diffusion mechanism and parameter optimization in the process of grouting reinforcement and sealing of drenching and soft roadway,firstly,the fluid-solid coupling numerical analyses were applied to explore the principle of slurry motion and diffusion in the rock mass,and the reasonable grouting pressure,time and water-cement ratio were given.Then based on the elastic-plastic and seepage theory,the relationship of grouting reinforcement radius and size of plastic zone was analyzed under the osmotic pressure to determine reasonable grouting depth.Research results showed that:Diffusion range of high-water viscosity time-dependent slurry increased with the grouting pressure,water-cement ratio and time in the rock mass,and the reasonable grouting pressure was 2.5 MPa; water-cement ratio was 2∶1; grouting time was about 30 min under geological conditions of the SXJ production.The radius of plastic zone decreased with the increase of grouting radius but the decrement become low,it concluded that the reasonable grouting radius was about 10.29 m.The radius of the plastic zone around the roadway under the osmotic pressure of 0.5 MPa and the grouting raduis of 5.5 m was 2.84 m greater than the radius of 2.10 m under non-seepage pressure.The optimized grouting parameters were applied to the treatment of surrounding rock of drenching and soft roadway using deep-hole anchorage grouting technology,and the good results had been achieved.
引文
[1] 严红,何富连,段其涛.淋涌水碎裂煤岩顶板煤巷破坏特征及控制对策研究[J].岩石力学与工程学报,2012,31(3):525-526.Yan Hong,He Fulian,Duan Qitao.Failure characteristic of coal roadway with water spraying and gushing in fragmentation roof and its control countermeasures [J].Chinese Journal of Rock Mechanics and Engineering,2012,31(3):525-526.
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[4] 刘泉声,卢超波,卢海峰,等.断层软弱带深部区域地表注浆加固应用与分析[J].岩石力学与工程学报,2013,32(2):3689-3695.Liu Quansheng,Lu Chaobo,Lu Haifeng,et al.Application and analysis of ground surface pre-grouting strengthening deep fault fracture zone [J].Chinese Journal of Rock Mechanics and Engineering,2013,32(2):3689-3695.
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[6] 宗义江,韩立军,黄小忠,等.高承压水作用下突水巷道注浆恢复与支护技术[J].采矿与安全工程学报,2016,33(6):993-998.Zong Yijiang,Han Lijun,Huang Xiaozhong,et al.Grouting recovering and support technology of water-bursting roadway under high confined water pressure [J].Journal of Mining & Safety Engineering,2016,33(6):993-998.
[7] 薛华俊.大断面软弱煤帮巷道注浆体力学特性与控制技术研究[D].北京:中国矿业大学(北京),2016.
[8] 阮文军.基于浆液黏度时变性的岩体裂隙注浆扩散模型[J].岩石力学与工程学报,2005,24(15):2709-2714.Ruan Wenjun.Spreading model of grouting in rock mass fissures based on time-dependent behavior of viscosity of cement-based grouts [J].Chinese Journal of Rock Mechanics and Engineering,2005,24(15):2709-2714.
[9] 阮文军.注浆扩散与浆液若干基本性能研究[J].岩土工程学报,2005,27(1):70-73.Ruan Wenjun.Research on diffusion of grouting and basic properties of grouts [J].Chinese Journal of Geotechnical Engineering,2005,27(1):70-73.
[10] Saada Z,Canou J,Dupla J C.Influence of injection rate on injectability properties of a cement grout in a sand [C].5th ICEG Environmental Geotechnics,2006,1(1):773-780.
[11] Biot M A,Willis D G.The elastic coefficients of the theory of consolidation [J].ASME Journal of Application Mechanic,1957(24):594-601.
[12] Li Peichao,Kong Xiangyan,Lu Detang.Mathematical model of flow in saturated media on account of fluid-structure coupling effect [J].Journal of Hydrodynamics (Ser.A),2003,18(4):419-426.
[13] 张远君.流体力学[M].北京:北京航空航天大学出版社,1991:20-21.
[14] 胡国忠,蓝昌金,何文瑞,等.瓦斯抽采钻孔注浆固结封孔过程中超高水膨胀浆液的可注性研究[J].煤矿安全,2017,48(7):9-12.Hu Guozhong,Lan Changjin,He Wenrui,et al.Study on grout-ability of super high-aqueous expansive slurry during hole sealing process of gas drainage holes [J].Safety in Coal Mines,2017,48(7):9-12.
[15] 陈仲颐,周景星.土力学[M].北京:清华大学出版社,1997.
[16] 荣传新,程桦.地下水渗流对隧道围岩稳定性影响的理论解[J].岩石力学与工程学报,2004,23(5):741-744.Rong Chuanxin,Cheng Hua.Groundwater seepage theory solution of influence on the stability of surrounding rock of roadway [J].Chinese Journal of Rock Mechanics and Engineering,2004,23(5):741-744.
[17] 徐芝纶.弹性力学[M].第2版.北京:高等教育出版社,1982:85-91.
[18] 蔡美峰,何满潮,刘东燕.岩石力学与工程[M].北京:科学出版社,2002:103-107.
[2] 何富连,严红,杨绿刚,等.淋水碎裂顶板煤巷锚固试验研究与实践[J].岩土力学,2011,32(9):2592-2595.He Fulian,Yan Hong,Yang Lügang,et al.Anchorage experimental research on a coal roadway with water spraying and broken roof and its application [J].Rock and Soil Mechanics,2011,32(9):2592-2595.
[3] 刘泉声,卢超波,刘滨,等.深部巷道注浆加固浆液扩散机理与应用研究[J].采矿与安全工程学报,2014,31(3):334-339.Liu Quansheng,Lu Chaobo,Liu Bin,et al.Research on the grouting diffusion mechanism and its application of grouting reinforcement in deep roadway [J].Journal of Mining & Safety Engineering,2014,31(3):334-339.
[4] 刘泉声,卢超波,卢海峰,等.断层软弱带深部区域地表注浆加固应用与分析[J].岩石力学与工程学报,2013,32(2):3689-3695.Liu Quansheng,Lu Chaobo,Lu Haifeng,et al.Application and analysis of ground surface pre-grouting strengthening deep fault fracture zone [J].Chinese Journal of Rock Mechanics and Engineering,2013,32(2):3689-3695.
[5] 张农,王保贵,郑西贵,等.千米深井软岩巷道二次支护中的注浆加固效果分析[J].煤炭科学技术,2010,38(5):35-38.Zhang Nong,Wang Baogui,Zheng Xigui,et al.Analysis on grouting reinforcement results in secondary support of soft rock roadway in kilometer deep mine [J].Coal Science and Technology,2010,38(5):35-38.
[6] 宗义江,韩立军,黄小忠,等.高承压水作用下突水巷道注浆恢复与支护技术[J].采矿与安全工程学报,2016,33(6):993-998.Zong Yijiang,Han Lijun,Huang Xiaozhong,et al.Grouting recovering and support technology of water-bursting roadway under high confined water pressure [J].Journal of Mining & Safety Engineering,2016,33(6):993-998.
[7] 薛华俊.大断面软弱煤帮巷道注浆体力学特性与控制技术研究[D].北京:中国矿业大学(北京),2016.
[8] 阮文军.基于浆液黏度时变性的岩体裂隙注浆扩散模型[J].岩石力学与工程学报,2005,24(15):2709-2714.Ruan Wenjun.Spreading model of grouting in rock mass fissures based on time-dependent behavior of viscosity of cement-based grouts [J].Chinese Journal of Rock Mechanics and Engineering,2005,24(15):2709-2714.
[9] 阮文军.注浆扩散与浆液若干基本性能研究[J].岩土工程学报,2005,27(1):70-73.Ruan Wenjun.Research on diffusion of grouting and basic properties of grouts [J].Chinese Journal of Geotechnical Engineering,2005,27(1):70-73.
[10] Saada Z,Canou J,Dupla J C.Influence of injection rate on injectability properties of a cement grout in a sand [C].5th ICEG Environmental Geotechnics,2006,1(1):773-780.
[11] Biot M A,Willis D G.The elastic coefficients of the theory of consolidation [J].ASME Journal of Application Mechanic,1957(24):594-601.
[12] Li Peichao,Kong Xiangyan,Lu Detang.Mathematical model of flow in saturated media on account of fluid-structure coupling effect [J].Journal of Hydrodynamics (Ser.A),2003,18(4):419-426.
[13] 张远君.流体力学[M].北京:北京航空航天大学出版社,1991:20-21.
[14] 胡国忠,蓝昌金,何文瑞,等.瓦斯抽采钻孔注浆固结封孔过程中超高水膨胀浆液的可注性研究[J].煤矿安全,2017,48(7):9-12.Hu Guozhong,Lan Changjin,He Wenrui,et al.Study on grout-ability of super high-aqueous expansive slurry during hole sealing process of gas drainage holes [J].Safety in Coal Mines,2017,48(7):9-12.
[15] 陈仲颐,周景星.土力学[M].北京:清华大学出版社,1997.
[16] 荣传新,程桦.地下水渗流对隧道围岩稳定性影响的理论解[J].岩石力学与工程学报,2004,23(5):741-744.Rong Chuanxin,Cheng Hua.Groundwater seepage theory solution of influence on the stability of surrounding rock of roadway [J].Chinese Journal of Rock Mechanics and Engineering,2004,23(5):741-744.
[17] 徐芝纶.弹性力学[M].第2版.北京:高等教育出版社,1982:85-91.
[18] 蔡美峰,何满潮,刘东燕.岩石力学与工程[M].北京:科学出版社,2002:103-107.