贵州水城蟠龙煤矿古滑坡形成及复活的可能性分析

Possibility Analysis of Ancient Landslide Formation and Reactivation in Panlong Coalmine, Shuicheng, Guizhou

经对贵州省水城县蟠龙煤矿的地质勘探,发现矿区内存在较为典型的崩塌式古滑坡。从地形地貌、地层岩性、构造和水文等方面阐述了滑坡形成的地质环境背景;并从滑坡体的规模、形态、结构和物质来源方面分析了滑坡的特征。研究认为:区内断层形成于滑坡之前,是滑坡形成的前期条件,地形地貌、水文等条件为主要诱发因素;滑坡形成过程可以分为两个阶段,第一阶段为崩塌的形成,第二阶段为滑坡的发生阶段。依据矿井排水、大气降水和采矿活动等方面分析得出滑坡存在复活的可能性,并以深层蠕动变形为主。从而为以后滑坡的治理、安全采矿提供了依据。

After geological exploration in Panlong coalmine, Shuicheng, Guizhou, has found a typical avalanche type ancient landslide existed in the mine area. The paper expounded geological environment setting of landslide formation from aspects of landform and topography, stratigraphy and lithology, structure and hydrology; and analyzed landslide characteristics from dimensions, configuration, structure and provenance. The study has considered that the faults in the area were formed before the landslide, thus the precondition, while main inducing factors have landform, topographic and hydrologic conditions. The forming process of landslide can be divided into two stages： the first stage was the formation of avalanche; second stage was landslide occurrence. Finally went a step further to analyze mine drainage, atmospheric precipitation and mining activities educed a conclusion that the landslide reactivation is possible, and mainly deep part creeping deformation. The study has provided a basis for subsequent landslide governing and safe mining.