云南某铜矿尾矿物理力学特性及尾矿库稳定性评价  

Physical and mechanical properties and stability evaluation of a tailings reservoir in Yunnan Province

作　　者：翁彦梅 洪茂银 刘晓庆 关艳丽 WENG Yanmei;HONG Maoyin;LIU Xiaoqing;GUAN Yanli(Yunnan Urban and Rural Construction Investment No.1 Engineering Survey and Design Co.,Ltd.,Kunming 650031,Yunnan,China;Yunnan Southern Geological Survey Engineering,Co.,Ltd.,Dali 671000,Yunnan,China)

机构地区：[1]云南建投第一勘察设计有限公司,云南昆明650031 [2]云南南方地勘工程有限公司,云南大理671000

出　　处：《矿产勘查》2025年第2期403-411,共9页Mineral Exploration

基　　金：地质灾害防治与地质环境保护国家重点实验室开放基金资助项目“震区急陡沟道泥石流形成运动过程及早期预警模型研究”(SKLGP2023K010)资助。

摘　　要：随着矿业的快速发展和资源需求的增加,尾矿库的稳定性及扩容成为了保证矿业可持续发展和环境安全的关键问题,本文以香格里拉市某铜矿尾矿库为研究对象,对库区现状稳定性进行评价及扩容后的适应性进行分析。通过野外踏勘、现场取样及室内土工试验、模拟计算等手段,查明区内地形地貌、地层岩性、水文地质条件和地质构造,分析不同岩土层的物理力学参数,计算现状和尾矿库扩容后不同工况下的稳定性,结果表明:(1)地下水位以上尾粉砂层的黏聚力较地下水位以下的黏聚力偏小,地下水位以上尾粉砂层的内摩擦角较地下水位以下的内摩擦角偏大;(2)地下水位以上尾粉土层的黏聚力较地下水位以下的黏聚力偏小,内摩擦角接近;(3)现状尾矿库库底和库岸及坝体均处于稳定状态,经计算各工况下的坝坡稳定性计算值均满足规范要求;(4)根据拟实施对尾矿库扩容方案,在采用三轴剪切和浸水固结快剪参数的条件下,计算结果表明尾矿库均处于稳定状态,尾矿库适宜扩容。本研究的成功实践为其他尾矿库的稳定性评估和扩容提供了重要的参考和借鉴。With the rapid development of the mining industry and the increasing demand for resources,the sta-bility and expansion of the tailings reservoir have become the key issues to ensure the sustainable development of the mining industry and environmental safety.This paper takes the tailings reservoir of Xuejiping Copper Mine as the research object,evaluates the current stability of the reservoir area and analyzes its adaptability after expansion.By means of field survey,field sampling,indoor soil test and simulation calculation,the terrain and geomorphology,formation lithology,hydrogeological conditions and geological structure in the area were ascertained,the physical and mechanical parameters of different rock and soil layers were analyzed,and the status quo and stability of the tailings pond under different working conditions after expansion were calculated.The results showed that:(1)The cohesion above the water table of the tail silt layer is smaller than that below the water table,and the internal fric-tion Angle above the water table is larger than that below the water table;(2)The cohesion above the groundwater level of the tail silt layer is smaller than that below the groundwater level,and the internal friction Angle is close.(3)The bottom and bank of the tailings pond and the dam body are in a stable state,and the calculated stability values of the dam slope under each working condition meet the requirements of the code;(4)According to the proposed ex-pansion plan for the tailings pond,under the fast shear parameters of triaxial shear and immersion consolidation,the tailings pond is in a stable state and the expansion of the tailings pond is suitable.The successful practice of this study provides an important reference for the stability assessment and expansion of other tailings reservoirs.

关 键 词：尾矿库 物理力学特性 稳定性评价 三轴剪切 浸水固结快剪 

分 类 号：TD80[矿业工程—矿山开采]