摘要
为了揭示矸石充填工作面超前支承压力分布规律,以邢台矿7608矸石充填工作面为工程背景,采用理论分析、数值模拟和现场实测相结合法进行研究。结果表明：由于矸石充填开采充填体对上覆岩层的支撑作用,使其超前支承压力增长缓慢并最终趋于稳定,同时矸石充填比完全垮落工作面超前支承压力峰值强度下降,应力集中系数减小,峰值距煤壁距离由6-8 m减小到4-6 m,其影响范围由40-55 m减小到30-40 m。
In order to reveal the distribution laws of abutment pressure of gangue backfillng working face,taking 7608 gangue backfilling working face of Xingtai Mine as engineering backgroud,we mainly use theoretical analysis,numerical simulation and in- situ observation to study deeply. The results show that the filling boby of gangue backfilling plays a supporting role in overlying rock,so the slow growth of advanced abutment pressure tends to be stable,the peak strength of advanced abutment pressure in gangue backfilling working face is smaller than that in complete caving,the coefficient of stress concentration could reduce,the coal wall peak decreased from（ 6 to 8 m） to（ 4 to 6 m） and the influence range decreased from（ 40 to 55 m） to（ 30 to 40 m）.
出处
《煤矿安全》
CAS
北大核心
2015年第8期33-35,共3页
Safety in Coal Mines
基金
国家自然科学基金煤炭联合基金重点资助项目(U1361209)
中国矿业大学(北京)博士研究生拔尖创新人才资助项目(800015Z687)
关键词
矸石充填
超前支承压力
等价采高
超前支护
数值模拟
gangue backfilling
advanced abutment pressure
equivalent mining height
advanced support
numerical simulation
