砾岩含水层帷幕浆液运移规律与改性效果分析
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摘要
注浆帷幕截流是深部矿井水害治理的主要技术手段之一,针对淮北矿区朱仙庄煤矿8号煤层水害防治问题,采用CT扫描与室内试验测试得到受注砾岩孔裂隙分布及岩石力学特征,利用COMSOL Multiphysics软件建立了受注砾岩层的孔隙介质与孔隙-单裂隙介质2种数值模型,分析了帷幕墙注浆截流效果。研究结果表明:浆液在孔隙介质中的运移范围随注浆时间的增加而增大,浆液运移稳定后的扩散范围为10.12～10.44 m;孔隙-单裂隙介质数值模型中,浆液运移形态沿裂隙方向对称,浆液运移优先进入裂隙通道,随后沿裂隙方向扩散至孔隙介质中,随注浆时间的增加,浆液运移范围逐渐增大并最终趋于稳定,孔隙-单裂隙介质中浆液的纵向扩散范围为10.05～10.23 m,横向扩散范围为16.30～16.98 m;根据数值计算结果,提出了注浆孔间距为20 m、两排注浆孔交错布置、有效宽度约为40 m的帷幕截流方案。最后,通过注浆前后砾岩物理力学性质对比分析与现场放水试验的方法,验证了帷幕墙截流效果良好、注浆孔间距布置合理。
Grouting curtain closure is one of the main technical means for deep mine water damage control.The objective of this study was to solve the mine water damage problems in No.8 coal seam of Zhuxianzhuang coal in Huaibei mining area.The CT scan and laboratory test were used to obtain the fracture distribution and rock me-chanics characteristics of the conglomerate.In addition,two numerical models of pore media and pore-single fracture media in the conglomerate layer were established using COMSOL Multiphysics software.Also,the grouting curtain closure effect was analyzed.The results show that the range of slurry transport in the porous medium increases with the increase of grouting time,and the diffusion range of the stabilized slurry is 10.12-10.44 m.In the pore single fracture medium,the slurry preferentially enters the fracture channel and then diffuses into the pore medium along the fracture direction.With the increase of grouting time,the slurry transport range gradually increases and eventually stabilizes.The longitudinal diffusion range of slurry is 10.05-10.23 m,and the transverse diffusion range is 16.30-16.98 m.According to the numerical calculation results,20 m is selected as the spacing of grouting holes in the site curtain grouting project,two rows of staggered grouting holes are arranged,and the curtain wall with an effective width of about 40 m is established.Finally,with the comparative analysis of physical-mechanical properties of conglomerate before and after grouting and the method of on-site water release test,it is verified that the curtain wall closure effect is good and the spacing of the grouting holes is reasonable.
Grouting curtain closure is one of the main technical means for deep mine water damage control.The objective of this study was to solve the mine water damage problems in No.8 coal seam of Zhuxianzhuang coal in Huaibei mining area.The CT scan and laboratory test were used to obtain the fracture distribution and rock me-chanics characteristics of the conglomerate.In addition,two numerical models of pore media and pore-single fracture media in the conglomerate layer were established using COMSOL Multiphysics software.Also,the grouting curtain closure effect was analyzed.The results show that the range of slurry transport in the porous medium increases with the increase of grouting time,and the diffusion range of the stabilized slurry is 10.12-10.44 m.In the pore single fracture medium,the slurry preferentially enters the fracture channel and then diffuses into the pore medium along the fracture direction.With the increase of grouting time,the slurry transport range gradually increases and eventually stabilizes.The longitudinal diffusion range of slurry is 10.05-10.23 m,and the transverse diffusion range is 16.30-16.98 m.According to the numerical calculation results,20 m is selected as the spacing of grouting holes in the site curtain grouting project,two rows of staggered grouting holes are arranged,and the curtain wall with an effective width of about 40 m is established.Finally,with the comparative analysis of physical-mechanical properties of conglomerate before and after grouting and the method of on-site water release test,it is verified that the curtain wall closure effect is good and the spacing of the grouting holes is reasonable.
引文
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[9] PINTO A,TOMASIO R,MARQUES G.Ground improvement with jet grouting solutions at the new cruise terminal in Lisbon,Portugal[J].Procedia Engineering,2016,143:1495-1502.
[10] AMADEI B,SAVAGE W Z.An analytical solution for transient flow of bingham viscoplastic materials in rock fractures[J].International Journal of Rock Mechanics & Mining Sciences,2001,38:285-296.
[11] 湛铠瑜,隋旺华,高岳.单一裂隙动水注浆扩散模型[J].岩土力学,2011,32(6):1659-1664.ZHAN Kaiyu,SUI Wanghua,GAO Yue.A model for grouting into single fracture with flowing water[J].Rock and Soil Mechanics,2011,32(6):1659-1664.
[12] 张改玲,湛铠瑜,隋旺华.水流速度对单裂隙化学注浆浆液扩散影响的试验研究[J].煤炭学报,2011,36(3):403-406.ZHANG Gailing,ZHAN Kaiyu,SUI Wanghua.Experimental investigation of the impact of flow velocityon grout propagation during chemical grouting into a fracture with flowing water[J].Journal of China Coal Society,2011,36(3):403-406.
[13] 李术才,张霄,张庆松.地下工程涌突水注浆止水浆液扩散机制和封堵方法研究[J].岩石力学与工程学报,2011,30(11):2377-2395.LI Shucai,ZHANG Xiao,ZHANG Qingsong,et al.Research on mechanism of grout diffusion of dynamic grouting and plugging method in water inrush of underground engineering[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(11):2377-2395.
[14] 李术才,刘人太,张庆松,等.基于黏度时变性的水泥-玻璃浆液扩散机制研究[J].岩石力学与工程学报,2013,32(12):2415-2421.LI Shucai,LIU Rentai,ZHANG Qingsong,et al.Research on C-S slurry diffusion mechanism with time-dependent behavior of viscosity[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(12):2415-2421.
[15] 李术才,孙子正,刘人太,等.基于裂隙动水注浆的水泥-水玻璃浆液相界面特征研究[J].岩石力学与工程学报,2013,32(8):1640-1646.LI Shucai,SUN Zizheng,LIU Rentai,et al.Research on phase interface characteristics of chement-silicate grout based on crack grouting with dynamic water[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(8):1640-1646.
[16] 刘人太.水泥基速凝浆液地下工程动水注浆扩散封堵机理及应用研究[D].济南:山东大学,2012.LIU Rentai.Study on diffusion and plugging mechanism of quick setting cement based slurry in underground dynamic water grouting and its application[D].Jinan:Shandong University,2012.
[17] 冯志强.破碎煤岩体化学注浆加固材料研制及渗透扩散特性研究[D].北京:煤炭科学研究总院,2007.FENG Zhiqiang.Material development and research of osmosis and diffusion on chemical grouting for extraordinary cracked coal and rockmass[D].Beijing:China Coal Research Institute,2007.
[18] 刘鹏飞,梁树文,郑亮亮.帷幕注浆加固法在高含水率黄土隧道中的应用[J].地下空间与工程学报,2018,14(4):1137-1144.LIU Pengfei,LIANG Shuwen,ZHENG Liangliang.Application of curtain grouting reinforcement technique in tunnel with high water content loess stratum[J].Chinese Journal of Underground Space and Engineering,2018,14(4):1137-1144.
[19] 张民庆,张文强,孙国庆.注浆效果检查评定技术与应用实例[J].岩石力学与工程学报,2006,25(S2):3909-3918.ZHANG Minqing,ZHANG Wenqiang,SUN Guoqing.Evaluation technique of grouting effect and its applicationg engineering[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(S2):3909-3918.
[20] 王强,冯志强,王理想,等.裂隙岩体注浆扩散范围及注浆量数值模拟[J].煤炭学报,2016,41(10):2588-2595.WANG Qiang,FENG Zhiqiang,WANG Lixiang,et al.Numerical analysis of grouting radius and grout quantity in fractured rock mass[J].Journal of China Coal Society,2016,41(10):2588-2595.
[21] 刘健,刘人太,张霄,等.水泥浆液裂隙注浆扩散规律模型试验与数值模拟[J].岩石力学与工程学报,2012,31(12):2445-2452.LIU Jian,LIU Rentai,ZHANG Xiao,et al.Diffusion law model test and numerical simulation of cement fracture groution[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(12):2445-2452.
[22] 李海燕,张红军,李术才,等.断层滞后型突水渗-流转化机制及数值模拟研究[J].采矿与安全工程学报,2017,34(2):323-329.LI Haiyan,ZHANG Hongjun,LI Shucai,et al.The seepage-flowing conversion mechanism of the fault lagging water inrush and its numerical simulation[J].Journal of Mining and Safety Engineering,2017,34(2):323-329.
[23] 朱冠宇,姜波,朱慎刚.朱仙庄煤矿“五含”水文地质特征及水害防治对策[J].煤田地质与勘探,2018,46(2):111-117.ZHU Guanyu,JIANG Bo,ZHU Shengang.Hydrogeological characteristics and prevention countermeasures of “Fifth aquifer” in Zhuxianzhuang Coal Mine[J].Coal Geology & Exploration,2018,46(2):111-117.
[24] 张丁阳.裂隙岩体动水注浆扩散多场耦合机理研究[D].徐州:中国矿业大学,2018.ZHANG Dingyang.Investigation on coupling mechanism of multi-fields for grouting diffusion in fractured rock mass with flowing water[D].Xuzhou:China University of Mining and Technology,2018.
[25] 孔祥言.高等渗流力学[M].合肥:中国科学技术大学出版社,2010.
[2] 韩磊,陈建生,陈亮.帷幕灌浆扩散半径及数值模拟的研究[J].岩土力学,2012,33(7):2235-2240.HAN Lei,CHEN Jiansheng,CHEN Liang.Research on diffusion radius and numerical simulation in curtain grouting[J].Rock and Soil Mechanics,2012,33(7):2235-2240.
[3] GOTHALL R,STILLE H.Fracture-fracture interaction during grouting[J].Tunnelling and Underground Space Technology,2010,25:199-204.
[4] 耿耀强,王苏健,邓增社,等.神府矿区大型水库周边浅埋煤层开采水害防治技术[J].煤炭学报,2018,43(7):1999-2006.GENG Yaoqiang,WANG Sujian,DENG Zengshe,et al.Water disaster prevention and control technology in shallow coal seam around the large reservoir in Shenfu coal mine[J].Journal of China Coal Society,2018,43(7):1999-2006.
[5] TAKANO S,HAYASHI K,ZEN K,et al.Controlled curved drilling technique in the permeation grouting method for improvement works of an airport in operation[J].Advances in Transportation Geotechnics 3.The 3rd International Conference on Transportation Geotechnics(ICTG 2016),2016,143:539-547.
[6] 王国际.注浆技术理论与实践[M].徐州:中国矿业大学出版社,2000:98-116.
[7] 张庆松,张连震,刘人太,等.基于“浆-土”界面应力耦合效应的劈裂注浆理论[J].岩土工程学报,2016,38(2):323-330.ZHANG Qingsong,ZHANG Lianzhen,LIU Rentai,et al.Split grouting theory based on slurry-soil coupling effects[J].Chinese Journal of Geotechnical Engineering,2016,38(2):323-330.
[8] 李鹏,张庆松,张霄,等.基于模型试验的劈裂注浆机制分析[J].岩土力学,2014,35(1):3221-3230.LI Peng,ZHANG Qingsong,ZHANG Xiao,et al.Analysis of fracture grouting mechanism based on model test[J].Rock and Soil Mechanics,2014,35(1):3221-3230.
[9] PINTO A,TOMASIO R,MARQUES G.Ground improvement with jet grouting solutions at the new cruise terminal in Lisbon,Portugal[J].Procedia Engineering,2016,143:1495-1502.
[10] AMADEI B,SAVAGE W Z.An analytical solution for transient flow of bingham viscoplastic materials in rock fractures[J].International Journal of Rock Mechanics & Mining Sciences,2001,38:285-296.
[11] 湛铠瑜,隋旺华,高岳.单一裂隙动水注浆扩散模型[J].岩土力学,2011,32(6):1659-1664.ZHAN Kaiyu,SUI Wanghua,GAO Yue.A model for grouting into single fracture with flowing water[J].Rock and Soil Mechanics,2011,32(6):1659-1664.
[12] 张改玲,湛铠瑜,隋旺华.水流速度对单裂隙化学注浆浆液扩散影响的试验研究[J].煤炭学报,2011,36(3):403-406.ZHANG Gailing,ZHAN Kaiyu,SUI Wanghua.Experimental investigation of the impact of flow velocityon grout propagation during chemical grouting into a fracture with flowing water[J].Journal of China Coal Society,2011,36(3):403-406.
[13] 李术才,张霄,张庆松.地下工程涌突水注浆止水浆液扩散机制和封堵方法研究[J].岩石力学与工程学报,2011,30(11):2377-2395.LI Shucai,ZHANG Xiao,ZHANG Qingsong,et al.Research on mechanism of grout diffusion of dynamic grouting and plugging method in water inrush of underground engineering[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(11):2377-2395.
[14] 李术才,刘人太,张庆松,等.基于黏度时变性的水泥-玻璃浆液扩散机制研究[J].岩石力学与工程学报,2013,32(12):2415-2421.LI Shucai,LIU Rentai,ZHANG Qingsong,et al.Research on C-S slurry diffusion mechanism with time-dependent behavior of viscosity[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(12):2415-2421.
[15] 李术才,孙子正,刘人太,等.基于裂隙动水注浆的水泥-水玻璃浆液相界面特征研究[J].岩石力学与工程学报,2013,32(8):1640-1646.LI Shucai,SUN Zizheng,LIU Rentai,et al.Research on phase interface characteristics of chement-silicate grout based on crack grouting with dynamic water[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(8):1640-1646.
[16] 刘人太.水泥基速凝浆液地下工程动水注浆扩散封堵机理及应用研究[D].济南:山东大学,2012.LIU Rentai.Study on diffusion and plugging mechanism of quick setting cement based slurry in underground dynamic water grouting and its application[D].Jinan:Shandong University,2012.
[17] 冯志强.破碎煤岩体化学注浆加固材料研制及渗透扩散特性研究[D].北京:煤炭科学研究总院,2007.FENG Zhiqiang.Material development and research of osmosis and diffusion on chemical grouting for extraordinary cracked coal and rockmass[D].Beijing:China Coal Research Institute,2007.
[18] 刘鹏飞,梁树文,郑亮亮.帷幕注浆加固法在高含水率黄土隧道中的应用[J].地下空间与工程学报,2018,14(4):1137-1144.LIU Pengfei,LIANG Shuwen,ZHENG Liangliang.Application of curtain grouting reinforcement technique in tunnel with high water content loess stratum[J].Chinese Journal of Underground Space and Engineering,2018,14(4):1137-1144.
[19] 张民庆,张文强,孙国庆.注浆效果检查评定技术与应用实例[J].岩石力学与工程学报,2006,25(S2):3909-3918.ZHANG Minqing,ZHANG Wenqiang,SUN Guoqing.Evaluation technique of grouting effect and its applicationg engineering[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(S2):3909-3918.
[20] 王强,冯志强,王理想,等.裂隙岩体注浆扩散范围及注浆量数值模拟[J].煤炭学报,2016,41(10):2588-2595.WANG Qiang,FENG Zhiqiang,WANG Lixiang,et al.Numerical analysis of grouting radius and grout quantity in fractured rock mass[J].Journal of China Coal Society,2016,41(10):2588-2595.
[21] 刘健,刘人太,张霄,等.水泥浆液裂隙注浆扩散规律模型试验与数值模拟[J].岩石力学与工程学报,2012,31(12):2445-2452.LIU Jian,LIU Rentai,ZHANG Xiao,et al.Diffusion law model test and numerical simulation of cement fracture groution[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(12):2445-2452.
[22] 李海燕,张红军,李术才,等.断层滞后型突水渗-流转化机制及数值模拟研究[J].采矿与安全工程学报,2017,34(2):323-329.LI Haiyan,ZHANG Hongjun,LI Shucai,et al.The seepage-flowing conversion mechanism of the fault lagging water inrush and its numerical simulation[J].Journal of Mining and Safety Engineering,2017,34(2):323-329.
[23] 朱冠宇,姜波,朱慎刚.朱仙庄煤矿“五含”水文地质特征及水害防治对策[J].煤田地质与勘探,2018,46(2):111-117.ZHU Guanyu,JIANG Bo,ZHU Shengang.Hydrogeological characteristics and prevention countermeasures of “Fifth aquifer” in Zhuxianzhuang Coal Mine[J].Coal Geology & Exploration,2018,46(2):111-117.
[24] 张丁阳.裂隙岩体动水注浆扩散多场耦合机理研究[D].徐州:中国矿业大学,2018.ZHANG Dingyang.Investigation on coupling mechanism of multi-fields for grouting diffusion in fractured rock mass with flowing water[D].Xuzhou:China University of Mining and Technology,2018.
[25] 孔祥言.高等渗流力学[M].合肥:中国科学技术大学出版社,2010.
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