Prevention technology for landslide disasters in open-pit coal mines based on 3D numerical simulation and tangent angle theory
The deformation of soft rock slopes in open-pit coal mines is complex,and the risk of landslides is high.In order to effectively prevent landslide disasters,a landslide disaster prevention technology combining 3D numerical simulation and tangent angle theory was proposed.The research process of this technology was based on large-scale 3D numerical simulation to find potential deformation bodies in space,and different types of slope radar warning threshold division standards were established by using the tangent angle theory of creep curves,and all-weather monitoring was conducted for potential key deformation areas at a time scale.The application of this technology in the prevention of landslide disasters in the slope of the No.2 open-pit mining area of Huolinhe coalfield had achieved good results.Through numerical simulation technology,it was found that there was a potential deformation body on the slope near the excavation area of the southern slope of the mining area,which posed a risk of landslides.Combined with the tangent angle theory,the slope radar monitoring threshold was calculated to issue early warning information.The deformation area monitored by the slope radar was basically consistent with the potential deformation area obtained from 3D numerical simulation,successfully warning the occurrence of slope deformation and ensuring the safety production of open-pit coal mines.
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