Analysis on formation mechanism of geological disasters caused by mountain collapse in coal mine goafs
Coal mine goaf is one of the most common and one of the problems left by coal resources mining and has the greatest impact and harm.Once the goaf collapses,it may lead to mountain collapse,and then bring greater harm.To effectively prevent the occurrence of geological disasters caused by collapse in coal mine goaf,it is often necessary to grasp the formation mechanism of geological disasters caused by collapse in coal mine goaf.At the same time,this is the basis for doing a good job in warning geological disasters caused by collapse,and it must be highly valued by relevant personnel.Based on this,the article first elaborated on the formation conditions and main influencing factors of Collapse body in the goaf area of Daping Coal Mine,including terrain,lithology,rock structure,heavy rain-fall,and human activities.At the same time,FLAC numerical simulation method was used to analyze the mechanism of collapse forma-tion from three dimensions:stress field characteristics,displacement field characteristics,and plastic zone characteristics,clarifying the law of geological disasters caused by collapse in goaf,for example,the occurrence of collapse geological disasters was directly caused by underground mining,and human factors,natural precipitation,and regional groundwater influence were other factors.Finally,a monito-ring method for collapse geological disasters and warning suggestions based on monitoring and analysis results were proposed,aiming to provide reference for relevant personnel,minimize the adverse effects of geological disasters induced by landslides in coal mine goaf.
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