Study Of Geo-environmental Response To Mining Subsidence Of Coal Resources

Mining subsidence is one of the most important geo-environmental problems which caused by coal mining.The relevance study of influence factors of mining subsidence and its treatment methods have a significant affection on the treatment of mining subsidence. Also, the response of mining subsidence to the geo-environment plays an important role in the study of relevance. However, it is still an weakness study on the influence factors or the characteristics of ground surface deformation or the demand to the treatment methods.Further more, there exists a lack of the study about the objective factors’ relevance such as geo-environmental background and mining condition.This article analysis the characteristics of mining subsidence according to the typical coal mine in the geo-environmental investigation of Inner Mongolia in 2012. Also, it induces the types and mechanism and so on about the pro-study on mining subsidence.Then sums up the main affect factors in order to be used in numerical simulation. This paper builds the model by the software named FLAC3 D and go on its analysis work by the idea of orthogonal design. It made a combination of sensitivity of parameters and conditions in Inner Mongolia. This essay summarize the different characters about the geo-environmental response which affected by different factors.Last, it makes a application of the work about geo-environment analysis in the treatment in Inner Mongolia. This paper gets some conclusions and results by content above:(1) It makes a summarize about the conditions of mining subsidence in typical mining in Inner Mongolia according to the geo-environmental investigation.(2) The analysis of mining subsidence sensitivity of parameters shows that the worst condition to mining subsidence is “70&30 +clay +negative relief + soften rocks +60°”; In the result of orthogonal design, the property of overlay and orographic condition show an inconspicuous sensitivity to mining subsidence, the depth of mining shows notable sensitivity to mining subsidence, lithological character of rocks and coal seam occurrence show an significant sensitivity to mining subsidence.(3) The geo-environment response of mining subsidence affected by the depth of mining shows a character about incidence of surface and its deformation extent; Also, the lithological character of rocks shows an effect of destructiveness;What’s more, the coal seam occurrence usually affect the shape of bottom.(4) It builds the relevance of geo-environmental background and treatment methods of mining subsidence by the study on the relationship of the character of subsidence and treatment methods.(5) It makes a forecast about the further deformation in Da Yan 1st and Bai Yun. In Da Yan 1st,the mining subsidence will continue exists,with the shape of subsidence basin which might be smooth and integrated. However, the Bai Yun will continue its deformation as collapse sink which will be irregular in most areas.