School of Resources and Safety Engineering, China University of Mining and Technology (Beiing) Gas Research
Branch, China Coal Technology and Engineering Group Chongqing Research Institute

针对邻逆断层不规则综放工作面冲击危险性高的问题,以赵楼煤矿1303不规则综放工作面为工程背景,工作面邻FZ14∠70°逆断层,分析了工作面冲击危险影响因素;结合采动应力、多因素叠加法划分了工作面冲击危险区域;并分析了矿震日累计能量、日累计频次及其空间分布特征。结果表明:工作面整体具有中等冲击危险性;断层、工作面扩面及厚硬岩层"见方"垮落是影响工作面冲击危险的主要因素;工作面回采距离为0~500 m时,矿震主要分布在采空区区域,日累计频次变化趋势与工作面超前应力基本一致,回采距离大于500 m后,矿震分布范围扩大,活动剧烈程度升高,而工作面超前应力变化不明显;工作面轨道巷侧矿震呈现高能量低频次特征,冲击危险性高;运输巷侧矿震呈现低能量高频次特征,冲击危险性低。

According to a high bumping danger problem of irregular fully-mechanized top coal caving mining face in adjacent reverse fault, based on No.1303 ieg ular fully-mechanized top coal caving mining face in Zhaolou Mine as the engineering background, the coal mining face was neighboring to FZ14∠7O°reverse fault and t he paper analyzed the bumping danger influence factors of the coal mining face. The combination of the mining stress and multi factor superposition method was applie d 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 t hick 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 f ace 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 gat eway 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.

中煤科工集团重庆研究院有限公司青年创新基金资助项目(2014QNJJ22)；中央高校基本科研业务资助项目(2009QM01)；