尾矿库条件下排土场稳定性分析及治理研究  

Study on Stability Analysis and Treatment of Waste Disposal Site Under Condition of Tailings Reservoir

作　　者：谭星宇 TAN Xingyu(Changsha Institute of Mining Research Co.,Ltd.,Changsha,Hunan 410012,China;State Key Laboratory of Metal Mine Safety Technology,Changsha,Hunan 410012,China;Hunan Mine Geological Disaster Prevention and Environmental Reconstruction Engineering Technology Research Center,Changsha,Hunan 410012,China)

机构地区：[1]长沙矿山研究有限责任公司,湖南长沙410012 [2]金属矿山安全技术国家重点实验室,湖南长沙410012 [3]湖南省矿山地质灾害防治与环境再造工程技术研究中心,湖南长沙410012

出　　处：《矿业研究与开发》2023年第9期41-45,共5页Mining Research and Development

摘　　要：排土场的稳定性不仅与岩土物料的力学性质、排土工艺、排土场参数、地表水和地下水等因素有关,而且受基底岩土性质的影响较大。将部分或全部基底为尾矿坝的排土场定义为尾矿库条件下排土场。以某尾矿库条件下排土场为工程实例,借助SURPAC和FLAC3D软件建立该排土场的三维地质模型,采用试验的方法获得各组别岩土的物理力学参数;再借助FLAC3D软件分析或计算现状边坡的稳定性和安全系数。结果表明,排土场的边坡存在两处滑移风险区,降雨工况条件下边坡的安全系数为1.10,安全系数储备不足。制定了“滑移风险区卸荷+完善内部排水系统”的排土场治理方案,运用FLAC3D计算治理后排土场的安全系数,计算结果表明,治理方案实施后,排土场的边坡安全系数得到较大的提升,即治理方案的实施可提高排土场稳定性。The stability of the waste disposal site is not only related to the mechanical properties of the rock and soil materials,the waste disposal technology,the waste disposal site parameters,the surface water and the groundwater,but also seriously affected by the properties of the basement rock and soil.The waste disposal site with part or all of its base was defined as the waste disposal site under condition of tailings reservoir.Taking a waste disposal site under condition of tailings reservoir as an engineering example,the three-dimensional geological model of the waste disposal site was established by SURPAC and FLAC3D software.And the physical and mechanical parameters of each group of rock and soil were obtained by test method.Then the stability and safety factor of the waste disposal site were analyzed or calculated by FLAC3D software.The results show that there are two slip risk areas in the slope,the safety factor of slope under rainfall condition is 1.1o,and the safety factor reserve is insufficient.The waste disposal site treatment scheme was formulated as unloading in slip risk area and improving internal drainage system.Then,FLAC3D was used to calculate the safety factor of the controlled waste disposal site.The calculation results show that after the implementation of the treatment scheme,the slope safety factor of the dump has been greatly improved,that is,the implementation of the treatment scheme can improve the stability of the waste disposal site.

关 键 词：尾矿库条件下排土场 边坡稳定性 安全系数 三维建模 治理方案 

分 类 号：TD854.6[矿业工程—金属矿开采]