水城县鸡场镇岩脚组崩塌成因机制及稳定性分析

Genesis Mechanism and Stability Analysis of the Collapse in Jichang Town,Shuicheng County

受持续强降雨及采煤活动的影响,水城县鸡场镇坪地村岩脚组崩塌危岩体顶部裂缝变形剧烈。为了研究崩塌成因机制以及其稳定性,通过查明危岩体的空间几何特征、体积、已有的变形破坏特征,结合研究区的地形地貌、地层岩性、地质构造以及地下煤层开采情况,对岩脚组崩塌成因机制及稳定性进行研究。结果表明:该危岩带主要以滑移式、坠落式等方式失稳破坏,局部已经发生崩塌掉块现象;影响崩塌体的内在因素主要包括地质构造、岩体结构特征、地形地貌,外在因素主要包括降雨和人类工程活动工程;内在因素对危岩体的稳定性起控制作用,而外因是危岩体失稳的主要激发因素。

Under the influence of continuous heavy rainfall and coal mining activities,the fracture deformation of the top of the collapsed rock mass in Pingdi Village,Jichang Town,Shuicheng County is severe.In order to study the genesis mechanism of collapse and its stability,the spatial geometry,volume and existing deformation and failure characteristics of the dangerous rock mass were investigated,and combined with the topographic and geomorphologic features,stratigraphic lithology,geological structure and mining of underground coal seams in the study area,the genesis mechanism and stability of the collapse of the footstone formation were studied.The results show that the rock zone is unstable mainly by sliding mode and falling mode,and partial collapse and block dropping phenomenon has occurred.The factors that affect the collapse body mainly include internal factors such as geological structure,rock mass structure characteristics,topography and landform,and external factors such as rainfall and human engineering activities.The internal factors control the stability of the rock mass,and the external factors are the main trigger factors for its instability.