Study On Combination Of Four Mines And High Efficient Mining In Wudong Coal Mine

With the development of the coal industry,extensive mining is difficult to meet the requirements of the society.A safe and efficient mining modern mode is the ultimate direction of the development of coal enterprises.The environment of steeply inclined coal seam is complex,and its safe and efficient mining is a worldwide problem.It is of great significance to study the efficient mining mode of steep coal seam.On the background of combination of four mines and high efficient mining model in wudong coal mine,research,theoretical analysis,field measurement and other means are used in this study.Analysis of the influencing factors of combination of four mines and high efficient mining model in Wudong coal mine,through theoretical analysis,the way to realize the mining mode is studied and its characteristics are summed up;Use of AHP and fuzzy comprehensive evaluation model in formulation a fuzzy model of rationality evaluation of combined develepment system,evaluate its rationality,the result show that the rationality of"excellent" degree of membership is 0.73;Using the BP neural network,established the BP neural network model for predicting the caving property of top coal,with the increase of top coal cracking rate,the top coal caving property is gradually improved,when the deterioration rate is greater than 43%,the top coal will reach the class I caving standard.Finally,the water injection pressure is selected as 5MPa,and the single consumption of the explosive is 0.3kg/m3 as the optimal scheme;The engineering practice of +495m level B1+2 coal seam in West mining area is carried out,and the effect of top coal coupling cracking is verified through field measurement,the application of the coupling fracturing technology is good,and the recovery rate of the working face has been greatly improved.This study has important scientific significance and reference value for promoting the safe mining of steep coal seam in China...