露天矿边坡注浆帷幕止水效应数值模拟
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摘要
以某南方富水石灰石矿为工程背景,研究了注浆帷幕的止水效应。取该石灰石矿某典型边坡横剖面,建立了FLAC~(3D)流固分析数值模型,研究了开挖和渗流作用下边坡应力、边坡变形及孔隙水压力的变化特征。数值模拟分析结果表明:边坡应力、边坡水平位移和孔隙水压力均随着高程的降低而减小;在同一高程下,边坡开挖侧的孔隙水压力相对较小,说明注浆帷幕可有效减少水的渗入量,这对于露天矿业的安全开采和控制周边环境具有重要意义。
With a hydrous limestone mine in South China as the engineering background, a study has been carried out on the water-proof effect of the grouting curtain. With a typical cross section of a limestone mine slope as the research sample, a numerical model of FLAC~(3D) fluid-solid analysis has been established, followed by a study on the variation characteristics of slope stress, slope deformation and pore water pressure under excavation and seepage. The numerical results show that the slope stress, horizontal displacement and pore water pressure decrease with the decrease of elevation. At the same elevation, the pore water pressure on the excavation side of the slope is relatively small, which indicates that the grouting curtain can effectively reduce the water infiltration, a great significant indicator for the safe mining of open pit mining and the control of surrounding environment.
With a hydrous limestone mine in South China as the engineering background, a study has been carried out on the water-proof effect of the grouting curtain. With a typical cross section of a limestone mine slope as the research sample, a numerical model of FLAC~(3D) fluid-solid analysis has been established, followed by a study on the variation characteristics of slope stress, slope deformation and pore water pressure under excavation and seepage. The numerical results show that the slope stress, horizontal displacement and pore water pressure decrease with the decrease of elevation. At the same elevation, the pore water pressure on the excavation side of the slope is relatively small, which indicates that the grouting curtain can effectively reduce the water infiltration, a great significant indicator for the safe mining of open pit mining and the control of surrounding environment.
引文
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[2]徐加夫,辛小毛,王亮,等.某铁矿近矿体注浆帷幕效果分析[J].矿业研究与开发,2011,31(6):88-91.XU Jiafu,XIN Xiaomao,WANG Liang,et al.Effect Analysis on Grouting Curtain of Nearly Orebody in Iron Mine[J].Mining Research and Development,2011,31(6):88-91.
[3]腾永波.徐楼铁矿注浆效果分析[J].采矿技术,2010,10(4):89-90.TENG Yongbo.Effect Analysis of Grouting Curtain in Xulou Iron Mine[J].Mining Technology,2010,10(4):89-90.
[4]周斌,张超,邵迟,等.FLAC3D在建筑边坡稳定性分析中的应用[J].湖南工业大学学报,2018,32(2):13-18.ZHOU Bin,ZHANG Chao,SHAO Chi,et al.Application of FLAC3D in the Stability Analysis of Building Slopes[J].Journal of Hunan University of Technology,2018,32(2):13-18.
[5]高学通,刘殿风,蒋鹏飞.岩溶裂隙产状对帷幕注浆施工及堵水的影响[J].金属矿山,2013(3):25-28.GAO Xuetong,LIU Dianfeng,JIANG Pengfei.Influence of the Karst Fissure Occurrence on Construction and Water Plugging of Curtain Grouting[J].Metal Mine,2013(3):25-28.
[6]张金娟.粘土固化浆液渗透注浆理论与数值模拟在砾砂、卵石土层中的应用研究[D].大连:大连海事大学,2009.ZHANG Jinjuan.Theory of Perneation Grouting About Clay-Cement Grout and Application of Numerrical Simulation Among the Soil Including of Sands and Pebbles[D].Dalian:Dalian Maritime University,2009.
[7]金解放,赵奎,许振华,等.水对某露天矿边坡的危害分析及治理措施研究[J].露天采矿技术,2006,21(5):7-9.JIN Jiefang,ZHAO Kui,XU Zhenhua,et al.Hazard Analysis of Water on a Surface Mine Slope and Study on Harnessing Measure[J].Opencast Mining Technology,2006,21(5):7-9.
[8]姚鹏飞,高永涛,金爱兵,等.基于流-固耦合的露天矿山边坡地下连续墙变形特性研究[J].矿业研究与开发,2015,35(6):49-53.YAO Peng fei,GAO Yongtao,JIN Aibing,et al.Research on the Deformation Characteristics of Diaphragm Wall of Mine Slope Based on the Fluid-Solid Coupling Theory[J].Mining Research&Development,2015,35(6):49-53.
[9]李庆文,郭奇峰.基于流固耦合的高陡边坡开挖稳定性研究[J].中国矿业,2015,24(4):100-104.LI Qingwen,GUO Qifeng.Study on the Stability of Deep and Deep Slope Excavation Based on the FluidSolid Coupled[J].China Mining Magazine,2015,24(4):100-104.
[10]白国良.基于FLAC3D的采动岩体等效连续介质流固耦合模型及应用[J].采矿与安全工程学报,2010,27(1):106-110.BAI Guoliang.Fluid-Solid Coupling Model of Equivalent Continuous Medium in Overburden Rock Based on FLAC3D and Its Application[J].Journal of Mining and Safety Engineering,2010,27(1):106-110.
[11]王祖强,张贵金,王明,等.用FLAC3D模拟流固耦合评价病险土坝防渗加固效果[J].湖南水利水电,2009(2):41-43.WANG Zuqiang,ZHANG Guijin,WANG Ming,et al.Evaluation of Seepage Control and Reinforcement Effect of Dangerous Earth Dams by FLAC3D Simulation of Fluid-Solid Coupling[J].Hunan Hydro&Power,2009(2):41-43.