Analysis on bumping danger of irregular fully-mechanized top coal caving mining face in adjacent reverse fault

Wang Hao; Yi Enbing; Jiao Zhenhua; Li Siqian

doi:10.13199/j.cnki.cst.2017.04.006

Abstract：According to a high bumping danger problem of irregular fully-mechanized top coal caving mining face in adjacent reverse fault,based on No.1303 irregular fully-mechanized top coal caving mining face in Zhaolou Mine as the engineering background,the coal mining face was neighboring to FZ14∠70°reverse fault and the paper analyzed the bumping danger influence factors of the coal mining face.The combination of the mining stress and multi factor superposition method was applied to divide the bumping danger area of the coal mining face.The paper analyzed the day accumulated energy of the mine earthquake,day accumulated frequency and space distribution features.The results showed that the coal mining face would have medium bumping dangers generally.The fault,the mining face expansion and the thick and hard rock strata falling in "square" would be the main factors affected to the bumping danger of the coal mining face.when the mining distance of the mining face was 0 ～ 500 m,the mine earthquake would be mainly distributed in the area of goaf and the variation trend of the day accumulated frequency would be the same to the pilot stress of the coal mining face.When the mining distance of the mining face was over 500 m,the distribution scope of the mine earthquake would be expanded,the activity serious degree would be increased and the pilot stress of the coal miming face could not be varied obviously.The mine earthquake occurred at the track gateway side of the coal mining face would have the high energy and low frequency features and the bumping danger would be high.The mine earthquake occurred at the side of the transportation gateway would have the low energy and high frequency features and bumping danger would be low.