厚硬关键层下工作面采动超前支承应力分布规律研究  

Study on Distribution of Stress Distribution in Front of Working Face under Thick and Hard Key Layer

作　　者：刘炳权 LIU Bing-quan(School of Resource and Safety Engineering,China University of Mining and Technology（Beijing）,Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083

出　　处：《煤炭技术》2018年第10期58-61,共4页Coal Technology

基　　金：国家自然科学基金重点资助项目(51234005;51574243);中央高校基本科研业务费专项资金资助项目(2010YZ02)

摘　　要：以工作面上覆岩层中存在坚硬厚层岩层为研究背景,通过理论分析推导出了工作面超前支承应力带内塑性区和弹性区宽度的具体表达式。并对工作面开采致使厚硬关键层破断前后分别建立了相应的力学模型。通过理论计算和实际工程验证对比表明,厚硬主关键层破断后较破断前相比,其工作面超前支承应力的影响范围和峰值应力大小均减小。Based on the background of hard and thick strata in the overlying strata of working face,the specific expression of the plastic zone and elastic zone width in the advancing support stress zone is deduced through theoretical analysis.The corresponding mechanical models were established before and after the mining of the working face leading to the rupture of thick and hard key strata.Through theoretical calculation and practical engineering verification results show that the main key stratum fractured thick hard is broken before compared to the working face of advance support stress and the range of the influence of peak stress were decreased.

关 键 词：超前支承应力 厚硬关键层 峰值应力 

分 类 号：TD322[矿业工程—矿井建设]