贵州桐梓水竹湾煤矿危岩崩落运程分析

Crag Falling Course of Movement Analysis in Shuizhuwan Coalmine, Tongzhi, Guizhou

水竹湾煤矿主井井口上方的危岩呈南北走向,自下而上分成四级,是典型的自然危岩与采矿影响相结合的危岩类地质灾害。危岩体发生崩塌后,其运动方式主要表现为滑动、滚动、跳跃、自由崩落。根据危岩的运动过程原理,对该矿的危岩构成进行了研究,认为危岩破坏的内在因素是构造裂隙和卸荷裂隙,外在因素是大气降雨、植物根劈、温差作用、时间效应、地震及人类放炮等。通过分析水竹湾煤矿危岩崩落运动过程,得出岩块落距范围与实际崩落影响范围基本一致。可见这危岩崩落运动过程分析方法,可为估算陡崖或危岩矿山地质灾害提供定量化依据。

The crag hanging over the main shaft mouth of the Shuizhuwan coalmine is NS strike, four stages were divided from bottom to top, a typical geological hazard of natural crag combined with mining impact. When the crag is falling, the modes of motion have sliding, rolling, bouncing and freely falling. According to the principle of crag falling course of movement, studied the coalmine＇s crag composition, considered that the internal factors of crag failure have structural fissures and stress-release fissures, while external factors have atmospheric precipitation, plant root wedging, temperature difference, time effect, earthquake and artificial blasting etc. Through Shuizhuwan coalmine crag falling course of movement analysis, worked out the block falling confine is basically in accord with practical falling coverage of influence. It is obvious that the crag falling course of movement analysis can be the basis to estimate crag or perilous rock mine geological hazard quantization.