Risk assessment method of the surface geological disaster for coal mine in mountainous area of Guizhou——Take No.1 shaft of a mine in Jinsha County as an example
The mountainous areas of Guizhou have steep slopes and fragile geological conditions,and the collapse of coal mine goaf is easy to induce geological disasters such as landslides and collapses.Therefore,it is of great practical signifi-cance to carry out the risk assessment of geological disasters in coal mines in mountainous areas of Guizhou.Taking No.1 shaft of a coal mine in Jinsha County as the research area,and considering the comprehensive influence of four factors:stra-tum lithology,topography and geomorphology,geological structure and human engineering activity intensity,through qualita-tive analysis,the stratum lithology,slope structure,terrain slope and underground mining intensity were taken as the evalua-tion factors,and the analysis hierarchy method was used to construct the geological hazard risk assessment index system of the No.1 mine in Jinsha County,and the danger zoning of the mine geological disaster was carried out.The study area was divided into three areas:high-risk area,medium-risk area and low-risk area according to the degree of geological hazard risk,and the comparative analysis shows that the assessment results are consistent with the actual geological disaster development.
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