| This paper studies the dynamic stability control technology of soft rock slope based on an open-pit coal mine in northeast Inner Mongolia.On the basis of collecting and analyzing a large amount of research data on soft rock characteristics,this paper analyzes the engineering geological conditions and hydrogeological conditions of the slope of this mine by means of on-site geological survey,collection of previous geological data,engineering geological drilling and other methods,and finds out the spatial distribution state of each rock layer of the slope,weak layer distribution and landslide parameters.The physical and mechanical properties of the slope were obtained by combining the field test with the laboratory rock-soil physical and mechanical properties test,and the slope stability evaluation recommended indexes were determined by combining the landslide reverse analysis method.In non-working side selecting typical section,to reflect the actual situation of engineering geological model is established,based on general finite difference software FLAC~3DD and Geo-slope limit equilibrium analysis software,the deformation failure mechanism and engineering geological model for soft rock slope stability research,draw a non-working status quo of the slope can't meet the requirements for safety coefficient is 1.2.Therefore,the lower coal seam of non-working soft rock slope does not have the condition of conventional mining,and the non-working soft rock slope does not have the possibility of conventional mining under the premise of conventional governance.Therefore,in view of the actual situation of the soft rock slope of the non-working side of the mine,based on the mining method,this paper proposes the strip type control mining technology under the premise of effective monitoring of the slope.This technology stresses fast mining and quick drainage,so that the slope is always in a dynamic and stable state.The final practice proves that this technology is safe,reliable and economic. |
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