岩土力学2012，Vol.33Issue(4)：1134-1140,7.
沿空留巷上覆岩层关键块稳定性力学分析及巷旁充填体宽度确定
Mechanical analysis of stability of key blocks of overlying strata for gob-side entry retaining and calculating width of roadside backfill
摘要
Abstract
Due to long service time of the gob-side entry retaining and large deformation of surrounding rock, it is very important to calculate reasonably the width of roadside backfill. Based on activity rules of overlying strata of the gob-side entry retaining, The paper establishes a mechanical model of key blocks and immediate roof and analyses the interaction mechanism between key blocks and surrounding rock around the gob-side entry retaining, derives calculating formula of the gob-side supporting resistance, and introduces stability coefficients K1, K2 of key blocks and sensitive coefficients of influencing factors. If K1>1, extrusion instability will emerge; If K2>1, sliding instability will emerge. By taking No. 512 (5) working face in Xieyi coal mine in, Huainan as project background. The paper determines reasonable width of roadside backfill, calculates stability coefficients of key blocks, and obtains sensitive coefficients of influencing factors on the stability of key blocks. The case study shows that the mining height has great influence on the stability of key blocks, so applying the technique of the gob-side entry retaining to working face with large mining height is of significant difficulty.关键词
沿空留巷/关键块稳定性力学分析/充填体宽度/稳定性系数/影响因素的敏感度Key words
gob-side entry retaining/ mechanical analysis of the stability of key block/ width of roadside backfill/ stability coefficient/sensitive coefficient of influencing factors分类
建筑与水利引用本文复制引用
李迎富,华心祝..沿空留巷上覆岩层关键块稳定性力学分析及巷旁充填体宽度确定[J].岩土力学,2012,33(4):1134-1140,7.基金项目
国家自然基金重点资助项目(No.50774001). （No.50774001）
