Study on slope deformation induced by geological structure and control mining in Dongming Open-pit Mine
The southern slope of Dongming Open-pit Mine has deformation and cracks under the coupling of mining and water.In order to ensure the safe mining of the southern slope,we use geological exploration to find out the engineering geological conditions of the slope,and obtain the strength index parameters of the rock layer by back analysis of the shear strength parameters.The article adopts numerical simulation method to analyze the slope sliding mode,and calculates the stability coefficients of the pre-mining,post-mining and internal pressure foot stages.The results show that the south slope is in the wing of the geological structure,which is the main factor of deformation.The slope sliding mode is'located-sliding',and three sliding deformation areas are formed.Before mining,the local stability coefficient and the overall sliding stability coefficient of the slope under the action of rainfall and weak layer are greater than 1.1.After the mining of the corner of the slope,the stability coefficient decreases first to 1.012,and the stability coefficient increases to 1.105 after the backfilling of the internal dumping foot,showing a dynamic change of decreasing first and then increasing.
geological structuredownward slopeparameter back analysissliding modecontrol mining
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