毗邻尾矿库的排土场稳定性研究-以西源岭排土场为例

Study on the Slope Stability of the Waste Dump with Adjacently to the Tailings Pond-Take Xiyuanling Waste Dump as An Example

排土场的稳定性是矿山安全和生产的重要部分。本研究对排土场散体材料进行了室内大型三轴试验,研究了饱和试样和非饱和试样的抗剪强度和强度参数。基于极限平衡理论,研究了毗邻尾矿库和降雨条件下对排土场稳定性的影响。结果表明:散体材料试样饱和后,试样黏聚力增大,内摩擦角减小;当强降雨导致整个排土场处于饱和状态时,安全系数降低到不符合排土场设计标准;与尾矿库相邻,可以提高排土场的稳定性。研究成果可为毗邻尾矿库的矿山排土场的施工及稳定性研究提供一定的理论参考。

The stability of the dump site has an important effect on mine safety and production.In this study,the indoor large-scale triaxial tests were carried out for the granular materials of the waste dump.The shear strength and strength parameters for saturated and unsaturated samples were studied.According to the limit equilibrium theory,the effect of the conditions of the existence of tailings pond,the raising of water level and rainfall on the stability of the dump were investigated.The results indicate that the cohesion of the discrete material samples increases through saturation,and the internal friction angle decreases.When rainfall causes the granular materials to saturate,the safety factor is reduced to mot meet the design standards of the waste dump.The stability of the waste dump will be enhanced with adjacently to the tailings pond.The research results can provide a theoretical reference for the construction and stability study of mine waste dumps.