煤矿安全2025，Vol.56Issue(3)：167-176,10.DOI:10.13347/j.cnki.mkaq.20231538
浅埋近距离煤层开采上覆房式煤柱破坏规律及稳定性控制研究
Study on failure law and stability control of overlying room coal pillar in shallow buried close distance coal seams mining
摘要
Abstract
In order to study the instability and failure issues of overlying room coal pillar in shallow buried and close distance coal seams,and put forward the control method for coal pillar stability,the method of combining the mechanical properties test experi-ment of filing material and FLAC3D numerical simulation was used.The experimental investigation shows that when the pressure of compaction test reaches 15 MPa,the aeolian sand filling material will be basically dense;the mechanical properties test of aeolian sand-loess mixed material indicates that when the ratio of aeolian sand to loess is 1:0.4,the material has smaller deformation and stronger compressive capacity,which is used as the solid filling material in 2305 working face.In addition,when the 2305 working face is mined by caving method,the coal pillar has a large area of overall damage,the overall failure rate of the coal pillar is 93.7%.The overall failure rate of coal pillar is 88.6%,14.9%and 11.4%when solid filling rate is 40%,60%and 80%,respectively.Com-bined with the research results,the overall stability of coal pillar in overlying goaf can be effectively controlled when the filling rate is 60%.关键词
近距离煤层/房式采空区/煤柱失稳破坏/煤柱稳定性/固体充填采煤Key words
close distance coal seams/room mining goaf/coal pillar instability failure/coal pillar stability/solid filling mining分类
矿山工程引用本文复制引用
李鹏杰,杨峰,陈海富,高嘉良,赵瑞..浅埋近距离煤层开采上覆房式煤柱破坏规律及稳定性控制研究[J].煤矿安全,2025,56(3):167-176,10.基金项目
江苏省研究生科研创新资助项目(KYCX24_2875) （KYCX24_2875）
