摘要
为掌握充填区域顶板承载性能对沿空留巷围岩应力演化规律的影响,结合淮南矿区顾桥矿典型工程地质条件,采用平面应变物理模拟实验研究了充填区域顶板加固与否对留巷围岩应力分布规律的影响。研究结果表明,充填区域顶板不加固时,实体煤受力较小,最大应力仅为充填区域顶板加固时的2/3。充填区域顶板加固时,实体煤侧最大应力为充填区域顶板不加固时的1.5倍,充填体受力仅为充填区域顶板不加固时的28%。充填区域顶板承载性能的提高降低了充填体受力,利于充填体稳定。
In order to obtain the surrounding rock stress evolution law influenced by bearing capacity of backfilling area roof in gob-side entry retaining,based on the typical engineering geological conditions of Guqiao Coal Mine in Huainan mining area,conducted plane-strain physical simulation experiment to research on whether the reinforced backfilling area roof had an influence on surrounding rock stress distribution law in gob-side entry retaining.The results show that for the un-reinforced backfilling area roof,the stress on the solid coal side is minor,and its highest stress is 2/3 of that when the roof is reinforced.For the reinforced backfilling area roof,the highest stress on the solid coal is 1.5 times of that,and correspondingly,the stress on the backfilling wall is only 28% of that when the roof is un-reinforced.The reinforced backfilling area roof decreases the stress on backfilling wall,which has a significant improvement on the strength of backfilling wall.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2011年第9期1429-1434,共6页
Journal of China Coal Society
基金
国家重点基础研究发展计划(973)资助项目(2007CB209408)
中央高校基本科研业务费专项资金资助项目(2010QNA29)
煤炭资源与安全开采国家重点实验室(中国矿业大学)自主研究课题(SKLCRSM09X03)
关键词
沿空留巷
充填区顶板
承载性能
应力演化
gob-side entry retaining
backfilling area roof
bearing capacity
stress evolution
