| In this paper,it based on the 21701 working face and the background of field practice in Chensilou coal mine.Then use the theory of elastic-plastic mechanics and numerical simulation,from coal floor mining rock bearing stress and under confined water under the mutual influence of bottom body coupling mechanism of slate,analysis the deformation and destruction mechanism of water-inrush characteristics and distribution,stress of coal floor rock.Finally,the research results are optimized to optimize the karst water prevention and control technology in Chensilou coal mine.The main achievements of this paper are as follows:(1)The establishment of coal seam roof first weighting and periodic weighting of floor rock in mining support pressure and water pressure coupling mechanics analysis model,using elastic-plastic mechanics theory and numerical analysis software of coal mining in the process of mining stress distribution analysis of floor rock in the deduced the maximum depth of floor destruction.(2)The deformation and destruction characteristics of the confined hydraulic mining floor and the water inrush mechanism are analyzed by using the numerical analysis software FLAC3 D.The stress field and the seepage field are discussed from the characteristics of the destruction characteristics,the displacement law,the stress distribution law and the pore seepage law And the mechanism of water-inrush under different sizes and pressure water pressure is discussed and analyzed.And control technology of water inrush from coal mining.(3)According to the production practice and the research results of the cementing and grouting in Chensilou coal mine.The paper puts forward that there are some problems in the grouting reinforcement of the bottom plate,and it is put forward that the curve of the drilling depth of the bottom grouting can be approximated by the inclination angle of 30o ~ 40o with the drilling depth curve.The optimization of the grouting reinforcement effect. |
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