滥泥坪铜矿三维地应力测量及巷道布置优化研究  

Three-dimensional In-situ Stress Measurement and Optimization of Roadway Layout in Lanniping Copper Mine

作　　者：谢也真 曹平[1] 陈昊然 XIE Yezhen;CAO Ping;CHEN Haoran(School of Resources and Safety Engineering,Central South University,Changsha 410083,Hunan,China)

机构地区：[1]中南大学资源与安全工程学院

出　　处：《黄金科学技术》2019年第6期862-870,共9页Gold Science and Technology

基　　金：国家自然科学基金项目“开挖卸载诱导下的硬岩断裂破坏机理与尺寸效应研究”（编号：11772358）;中南大学自主探索创新项目“裂隙岩体卸荷、损伤、断裂机理及非线性特征研究”（编号：2019zzts986）联合资助

摘　　要：随着矿山开采深度的持续增加,深部高地应力作用下矿区的地压灾害发生率逐渐增长。为使矿区能够安全合理地开展生产工作,准确测量区域内的地应力分布情况,并在此基础上进行巷道布置优化研究很有必要。采用套孔应力解除法对滥泥坪深部3个中段进行三维地应力测试,并对三维应力场分布特征进行分析。测量结果表明:滥泥坪矿区应力随深度基本呈线性增长,实测的各中段最大主应力值在28.62~43.10 MPa之间,原岩应力场以水平构造应力为主,总体表现为NNW-SSE向,根据测量结果调整巷道布置方向并建立三维地质模型对巷道稳定性进行分析,研究结果对巷道布置和矿山安全生产具有重要的指导意义。The in-situ stress is the fundamental force causing damage and deformation of underground rock engineering.With the continuous increase of the mining depth,the ground pressure disaster of the mining area has gradually increased under the action of deep high ground stress.A large number of untreated goaf have been formed in the exploration and mining operations of the old and new areas of the Lanniping copper mine.Due to the influence of ground pressure,a number of collapse pits have been formed on the surface.In order to continue the safe and reasonable production work in the mining area,it is necessary to accurately measure the distribution of ground stress in the area and to optimize the layout of the roadway.The three-dimensional in-situ stress test was carried out on the three middle sections of the deep Lanniping copper mine by the stress relief method,9 sets of testing data in vertical direction are obtained.Meanwhile,the confining pressure rate test was carried out on the core sample,and the working state of 12 stress sheets was determined,and the distribution characteristics of the three-dimensional stress field were analyzed.The measurement results show that maximum principal stress,intermediate principal stress and minimum principal stress show an increasing trend with the increases of depth.The maximum principal stress values of the three measuring points in this test result are all high,the minimum value is 2350 m,which is 28.62 MPa,and the maximum value is 1900 m,about 43.1 MPa.According to domestic and international experience,the original rock stress field in the Lanniping belongs to the high geostress state.Combined with the layout of the stope and the specific mining method,the corresponding ground pressure testing measures and reasonable support methods should be adopted to ensure the safe mining of the mine.The original rock stress field is dominated by horizontal tectonic stress.The overall performance is NNW-SSW.According to the maximum shear stress theory,when the vertical stress at the top

关 键 词：应力解除法 三维地应力测量 应力分布特征 滥泥坪铜矿 巷道稳定性 数值模拟 

分 类 号：TD263[矿业工程—矿井建设]