长治矿区大采高工作面超前支承压力显现规律研究

Study on Advanced Abutment Pressure Behavior in Large-mining-height Working Face in Changzhi Mining Area

通过理论分析和现场实测得到三元王庄煤业大采高工作面超前支承压力分布规律：实体煤侧工作面超前支承压力显著影响范围为25m,峰值距工作面煤壁7~10 m,应力集中系数为2.3~2.8;采空区侧工作面超前支承压力显著影响范围为35m,峰值距工作面煤壁9~13m,应力集中系数为3.1左右;采空区侧工作面超前支承压力的峰值及影响范围均比实体煤侧的大。能为大采高开采技术在长治矿区的应用提供借鉴经验。

Theoretical analysis and field measurement advanced abutment pressure in large-mining-height working in the study obtained the distribution law of face in Wangzhuang mine of Shanyuan Coal Industry. Results showed that： the significant influence range of advanced abutment pressure of integrated coal was 25 meters, distance from the peak to coal walls 7 to 10 meters, and stress concentration factor 2.3 to 2.8; in mined-out area, the significant influence range was 35 meters, the distance 9 to 13 meters, and the factor about 3.1 respectively; therefore the peak and influence range of the mined-out area were bigger than the integrated coal. The study could offer references for the application of the large-mining-high technology in Changzhi mining area.