邻逆断层不规则综放工作面冲击危险性分析

发布时间：2018-05-02 12:23

本文选题：冲击危险 + 综放工作面　；参考：《煤炭科学技术》2017年04期

【摘要】：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。
[Abstract]:Aiming at the problem of high impact risk in irregular fully-mechanized caving face with adjacent reverse fault, taking 1303 irregular fully mechanized caving face of Zhaolu Coal Mine as engineering background, the paper analyzes the influencing factors of impact risk of working face, combining with mining dynamic stress, and next to FZ14's 70 掳reverse fault. The multi-factor superposition method is used to divide the perilous area of coal face impact, and the daily accumulative energy, daily accumulative frequency and spatial distribution characteristics of mine earthquake are analyzed. The results show that the whole face is of moderate impact risk, that the fault, the expanded face of the working face and the thick hard rock strata are the main factors affecting the impact hazard of the working face, and that the mining distance of the working face is 0 ~ 500m. Mine earthquake mainly distributes in goaf area, the daily accumulative frequency change trend is basically consistent with the working face lead stress. After the mining distance is more than 500 m, the distribution range of mine earthquake is enlarged, the intensity of activity is increased, but the change of working face leading stress is not obvious. The characteristics of high energy and low frequency and high impact risk are found in the side mine earthquake of working face, and the characteristics of low energy and high frequency of mine earthquake in the side of transportation roadway, and low risk of impact.
【作者单位】：中国矿业大学(北京)资源与安全工程学院;中煤科工集团重庆研究院有限公司瓦斯研究分院;
【基金】：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)
【分类号】：TD324

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