重庆万盛南桐矿区胡家沟矸石山滑坡灾害成因分析

在勘察胡家沟矸石山滑坡发育背景、分析灾害主要成因的基础上，运用极限平衡法和FLAC数值模拟对该矸石山进行了稳定性分析评价，揭示了滑坡产生的原因为：降雨前矸石山安全储备并不高，其体内已形成潜在滑移面，长时间降雨后，矸石山稳定性降低，同时，矸石山自燃加剧，导致喷爆，在喷爆动力能量扰动下，矸石山无法保持自组织临界状态，从而失稳滑坡，演化为泥石流.将宏观定性分析与定量计算相结合，并结合工程实际提出了矸石山滑坡灾害防治措施.

Cause analysis of Hujiagou coal wastes landslide in Nantong mining district of Wansheng,Chongqing

Introduced the situation and background of the two landslides,and discussed a series cause of two environmental geological hazards of the coal waste dump.Based on the results of exploration,the stability of the coal waste dump was discussed through the limiting equilibrium method and FLAC numerical simulation method.The calculated results show the cause of the coal wastes landslide further.The analyzed results indicate that the stability of the coal waste dump is not sufficient before the rainfall,and a potential slip surface exists in the waste dump.After sustaining rainfalls,the stability of the waste dump decreases.At same time,self-ignition and explosion of the coal wastes occur,and then blast.The blast makes the coal waste dump lose the self-organized critical state and a mass of coal wastes burst apart the dump and turned into flow.In order to avoid the loss of life and property,other analogous coal waste dump must draw lesson from it.