工程地质学报2013，Vol.21Issue(1)：61-68,8.
缓倾煤层采空区上覆山体滑坡形成机制分析
FORMATION MECHANISM OF LANDSLIDE ABOVE THE MINED OUT AREA IN GENTLY INCLINED COAL BEDS
王玉川 1巨能攀 1赵建军 1向喜琼2
作者信息
- 1. 成都理工大学地质灾害防治与地质环境保护国家重点实验室 成都 610059
- 2. 贵州大学贵州省喀斯特环境与地质灾害防治重点实验室 贵阳 550003
- 折叠
摘要
Abstract
Mining-out area in slope with gently inclined coal beds always can induce some engineering geological problems including subsidence and cracking of the surface, partial collapse, landslide. They are due to the difference of the goaf size and the slope structure characteristics. They can cause large-scale geological disasters. The Madaling landslide was generated in the slope with gently inclined strata dipping inward with soft rock sandwich and coal mining-out area. The landslide was caused by the mining-out area and the storm. Its volume is up to 190x 104m3. According to the engineering geological survey and analysis, the weak geologic structure and the damage of the goaf under the slope mainly caused the landslide. The concentrated regional rainfall accelerated the occurrence of the landslide. The formation mechanism of the Madaling landslide is the type of "collapse-rip-shear slip". The mechanism and process of the landslide can be divided into three stages as follows: (1) tension cracking of trailing edge of the slope,(2) sliding surface developing and interconnect, and (3) integral failure of the landslide. The sliding mass flowed downstream after disintegration, and formed 1. 5km long debris flow accumulation area. Large area farmland was submerged by the debris.关键词
滑坡/采空区/变形/破坏机制/midas/GTSKey words
Landslide/Mined-out area/Deformation/Failure mechanisms/Midas/GTS分类
建筑与水利引用本文复制引用
王玉川,巨能攀,赵建军,向喜琼..缓倾煤层采空区上覆山体滑坡形成机制分析[J].工程地质学报,2013,21(1):61-68,8.
