矿区岩溶裂隙岩体帷幕截流注浆参数确定研究
|
摘要
为使用帷幕注浆手段治理某矿区岩溶裂隙发育地层水害,采用室内试验对不同水灰比水泥浆液性能进行试验研究,得到不同水灰比水泥浆液性能及变化规律;并利用理论分析和数值计算对帷幕注浆压力和水泥浆液扩散半径进行了研究计算;结合帷幕墙体建设区域水文地质条件,综合确定了帷幕墙体建造尺寸、钻孔间距、注浆压力及水泥浆液选取工艺,为帷幕注浆治理工程设计提供了科学依据。最后,利用帷幕墙体内外放水试验检验了帷幕注浆墙体的截流效果,截流效果达到设计目的和要求,因此也验证了帷幕注浆参数选择的合理性。研究结果表明:水泥浆液黏度、结石率和结石体强度随水固的增大而降低,凝结时间随着水灰比的增大而增大,变化速率随水灰比的增大而降低;帷幕墙体厚度为40 m、钻孔间距为20 m和注浆终孔压力为4～6 MPa;利用放水试验对比帷幕墙体内外水位变化历时曲线是帷幕注浆效果检验的最直接手段。
In order to use curtain grouting to control the formation water damage of karst fissures in mining area,experimental tests were carried out the performance of cement slurries with different water-cement ratios,and the performance and variation of cement slurries with different water-cement ratios were obtained.The curtain grouting pressure and the diffusion radius of cement slurry were studied and calculated by theoretical analysis and numerical calculation.Combined with the hydro-geological conditions of the curtain wall construction area,the construction dimensions of the curtain wall,borehole spacing,grouting pressure and cement slurry selection process were determined comprehensively,which provided a scientific basis for curtain grouting control engineering design.Finally,the closure effect of curtain grouting wall was tested by water release test inside and outside the curtain wall.The closure effect achieved the design purpose and requirements.Therefore,the rationality of the selection of curtain grouting parameters was also verified.The results show that the cement slurry viscosity,stone rate and stone strength decrease with the increase of water-solid ratio,the setting time increases with the increase of watersolid ratio,and the rate of change decreases with the increase of water-cement ratio; the curtain wall thickness is 40 m,the borehole spacing is 20 m and the grouting end hole pressure is 4 ～ 6 MPa; the curtain grouting is used to compare the water level change curve inside and outside the curtain wall by water release test.It is by far the most direct means of curtain grouting effect test.
In order to use curtain grouting to control the formation water damage of karst fissures in mining area,experimental tests were carried out the performance of cement slurries with different water-cement ratios,and the performance and variation of cement slurries with different water-cement ratios were obtained.The curtain grouting pressure and the diffusion radius of cement slurry were studied and calculated by theoretical analysis and numerical calculation.Combined with the hydro-geological conditions of the curtain wall construction area,the construction dimensions of the curtain wall,borehole spacing,grouting pressure and cement slurry selection process were determined comprehensively,which provided a scientific basis for curtain grouting control engineering design.Finally,the closure effect of curtain grouting wall was tested by water release test inside and outside the curtain wall.The closure effect achieved the design purpose and requirements.Therefore,the rationality of the selection of curtain grouting parameters was also verified.The results show that the cement slurry viscosity,stone rate and stone strength decrease with the increase of water-solid ratio,the setting time increases with the increase of watersolid ratio,and the rate of change decreases with the increase of water-cement ratio; the curtain wall thickness is 40 m,the borehole spacing is 20 m and the grouting end hole pressure is 4 ～ 6 MPa; the curtain grouting is used to compare the water level change curve inside and outside the curtain wall by water release test.It is by far the most direct means of curtain grouting effect test.
引文
[1]钱七虎.地下工程建设安全面临的挑战和对策[J].岩石力学与工程学报,2012,31(10):1945-1956.QIAN Qihu.Challenges faced by underground projects construction safety and countermeasures[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(10):1954-1956.
[2]李术才,张伟杰,张庆松,等.富水断裂带优势劈裂注浆机制及注浆控制方法研究[J].岩土力学,2014,35(3):744-752.LI Shucai,ZHANG Weijie,ZHANG Qingsong,et al.Research on advantage-fracture grouting mechanism and controlled grouting method in water-rich fault zone[J].Rock and Soil Mechanics,2014,35(3):744-752.
[3]张庆松,韩伟伟,李术才,等.灰岩角砾岩破碎带涌水注浆综合治理[J].岩石力学与工程学报,2012,31(12):2412-2419.ZHANG Qingsong,HAN Weiwei,LI Shucai,et al.Comprehensive grouting treatment for water gushing analysis in limestone breccias fracture zone[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(12):2412-2419.
[4]武强,崔芳鹏,赵苏启,等.矿井水害类型划分及主要特征分析[J].煤炭学报,2013,38(4):561-565.WU Qiang,CUI Fangpeng,ZHAO Suqi,et al.Type classification and main characteristics of mine water disasters[J].Journal of China Coal Society,2013,38(4):561-565.
[5]崔芳鹏,武强,刘德民,等.煤矿突水灾害综合预防与治理技术[J].煤矿安全,2015,46(3):175-177.CUI Fangpeng,WU Qiang,LIU Demin,et al.Comprehensive technique for coal mine water disaster prevention and treatment[J].Safety in Coal Mines,2015,46(3):175-177.
[6]杨腾,张庆松,张霄,等.引流慢渗注浆作用下巷道顶板围岩变形规律与控制技术[J].煤炭工程,2017,49(9):23-26.YANG Teng,ZHANG Qingsong,ZHANG Xiao,et al.Deformation regularity and control of surrounding rock under the effect of roadway roof drainage and slow penetration grouting[J].Coal Engineering,2017,49(9):23-26.
[7]黄戡.裂隙岩体中隧道注浆加固理论研究及工程应用[D].长沙:中南大学,2011:53-58.
[8]苏清政,杨榆生,潘越,等.整合煤矿采空区内掘进巷道注浆加固技术[J].煤炭科学技术,2013,41(7):51-53.SU Qingzheng,YANG Yusheng,PAN Yue,et al.Grouting consolidation technlogy of driving roadway in goaf of integrated coal mine[J].Coal Science and Technology,2013,41(7):51-53.
[9]张庆松,张连震,李鹏,等.地下工程富水软弱地层注浆加固理论研究新进展[J].隧道与地下工程灾害防治,2019,1(1):47-57.ZHANG Qingsong,ZHANG Lianzhen,LI Peng,et al.New progress in grouting reinforcement theory of water-rich soft stratum in underground engineering[J].Hazard Control in Tunneling and Underground Engineering,2019,1(1):47-57.
[10]彭蓉蓉,俞文生.浆液性质对注浆压力及扩散方式的影响规律[J].山东大学学报:工学版,2017,47(3):119-124.PENG Rongrong,YU Wensheng.The influence of grouting pressure and diffusion features of different grouting materials[J].Journal of Shandong University:Engineering Science,2017,47(3):119-124.
[11]沙飞,刘人太,李术才,等.运营期渗漏水隧道注浆材料适用性[J].中南大学学报:自然科学版,2016,47(12):4163-4172.SHA Fei,LIU Rentai,LI Shucai,et al.Application on different types of cementation grouts for water-leakage operational tunnels[J].Journal of Central South University:Natural Science,2016,47(12):4163-4172.
[12]田正宏,罗时权,吴军,等.粉煤灰掺量对非连续级配混凝土新拌流变性影响[J].水电能源科学,2018,36(1):133-136,132.TIAN Zhenghong,LUO Shiquan,WU Jun,et al.Effect of fly ash content on rheological properties of discontinuous graded concrete[J].Water Resources and Power,2018,36(1):133-136,132.
[13]李仲辉,闫正芳,李绍春,等.水泥-粉煤灰浆液充填加固软岩巷道的研究与实践[J].建井技术,2003,24(2):27-30,40.LI Zhonghui,YAN Zhengfang,LI Shaochun,et al.Research and practice of filling and reinforcement of soft rock roadway with cement-fly ash slurry[J].Mine Construction Technology,2003,24(2):27-30,40.
[14]阙云,刘强华,李丹,等.渗透注浆扩散理论探讨[J].重庆交通学院学报,2006,25(5):105-108.QUE Yun,LIU Qianghua,LI Dan,et al.Research on diffusion theory of permeation grouting[J].Journal of Chongqing Jiaotong University,2006,25(5):105-108.
[15]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.
[16]李元松,吴春华,段鑫,等.大志山矿注浆帷幕防治水工程大型抽水试验[J].武汉工程大学学报,2015,37(8):6-12.LI Yuansong,WU Chunhua,DUAN Xin,et al.Steady-flow pumping test of groundwater blockage by grouting curtain in Dazhishan Mine[J].Journal of Wuhan Institute of Technology,2015,37(8):6-12.
[2]李术才,张伟杰,张庆松,等.富水断裂带优势劈裂注浆机制及注浆控制方法研究[J].岩土力学,2014,35(3):744-752.LI Shucai,ZHANG Weijie,ZHANG Qingsong,et al.Research on advantage-fracture grouting mechanism and controlled grouting method in water-rich fault zone[J].Rock and Soil Mechanics,2014,35(3):744-752.
[3]张庆松,韩伟伟,李术才,等.灰岩角砾岩破碎带涌水注浆综合治理[J].岩石力学与工程学报,2012,31(12):2412-2419.ZHANG Qingsong,HAN Weiwei,LI Shucai,et al.Comprehensive grouting treatment for water gushing analysis in limestone breccias fracture zone[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(12):2412-2419.
[4]武强,崔芳鹏,赵苏启,等.矿井水害类型划分及主要特征分析[J].煤炭学报,2013,38(4):561-565.WU Qiang,CUI Fangpeng,ZHAO Suqi,et al.Type classification and main characteristics of mine water disasters[J].Journal of China Coal Society,2013,38(4):561-565.
[5]崔芳鹏,武强,刘德民,等.煤矿突水灾害综合预防与治理技术[J].煤矿安全,2015,46(3):175-177.CUI Fangpeng,WU Qiang,LIU Demin,et al.Comprehensive technique for coal mine water disaster prevention and treatment[J].Safety in Coal Mines,2015,46(3):175-177.
[6]杨腾,张庆松,张霄,等.引流慢渗注浆作用下巷道顶板围岩变形规律与控制技术[J].煤炭工程,2017,49(9):23-26.YANG Teng,ZHANG Qingsong,ZHANG Xiao,et al.Deformation regularity and control of surrounding rock under the effect of roadway roof drainage and slow penetration grouting[J].Coal Engineering,2017,49(9):23-26.
[7]黄戡.裂隙岩体中隧道注浆加固理论研究及工程应用[D].长沙:中南大学,2011:53-58.
[8]苏清政,杨榆生,潘越,等.整合煤矿采空区内掘进巷道注浆加固技术[J].煤炭科学技术,2013,41(7):51-53.SU Qingzheng,YANG Yusheng,PAN Yue,et al.Grouting consolidation technlogy of driving roadway in goaf of integrated coal mine[J].Coal Science and Technology,2013,41(7):51-53.
[9]张庆松,张连震,李鹏,等.地下工程富水软弱地层注浆加固理论研究新进展[J].隧道与地下工程灾害防治,2019,1(1):47-57.ZHANG Qingsong,ZHANG Lianzhen,LI Peng,et al.New progress in grouting reinforcement theory of water-rich soft stratum in underground engineering[J].Hazard Control in Tunneling and Underground Engineering,2019,1(1):47-57.
[10]彭蓉蓉,俞文生.浆液性质对注浆压力及扩散方式的影响规律[J].山东大学学报:工学版,2017,47(3):119-124.PENG Rongrong,YU Wensheng.The influence of grouting pressure and diffusion features of different grouting materials[J].Journal of Shandong University:Engineering Science,2017,47(3):119-124.
[11]沙飞,刘人太,李术才,等.运营期渗漏水隧道注浆材料适用性[J].中南大学学报:自然科学版,2016,47(12):4163-4172.SHA Fei,LIU Rentai,LI Shucai,et al.Application on different types of cementation grouts for water-leakage operational tunnels[J].Journal of Central South University:Natural Science,2016,47(12):4163-4172.
[12]田正宏,罗时权,吴军,等.粉煤灰掺量对非连续级配混凝土新拌流变性影响[J].水电能源科学,2018,36(1):133-136,132.TIAN Zhenghong,LUO Shiquan,WU Jun,et al.Effect of fly ash content on rheological properties of discontinuous graded concrete[J].Water Resources and Power,2018,36(1):133-136,132.
[13]李仲辉,闫正芳,李绍春,等.水泥-粉煤灰浆液充填加固软岩巷道的研究与实践[J].建井技术,2003,24(2):27-30,40.LI Zhonghui,YAN Zhengfang,LI Shaochun,et al.Research and practice of filling and reinforcement of soft rock roadway with cement-fly ash slurry[J].Mine Construction Technology,2003,24(2):27-30,40.
[14]阙云,刘强华,李丹,等.渗透注浆扩散理论探讨[J].重庆交通学院学报,2006,25(5):105-108.QUE Yun,LIU Qianghua,LI Dan,et al.Research on diffusion theory of permeation grouting[J].Journal of Chongqing Jiaotong University,2006,25(5):105-108.
[15]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.
[16]李元松,吴春华,段鑫,等.大志山矿注浆帷幕防治水工程大型抽水试验[J].武汉工程大学学报,2015,37(8):6-12.LI Yuansong,WU Chunhua,DUAN Xin,et al.Steady-flow pumping test of groundwater blockage by grouting curtain in Dazhishan Mine[J].Journal of Wuhan Institute of Technology,2015,37(8):6-12.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |