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

作　　者：李鹏杰 杨峰 陈海富 高嘉良 赵瑞 LI Pengjie;YANG Feng;CHEN Haifu;GAO Jialiang;ZHAO Rui(School of Mines,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]中国矿业大学矿业工程学院,江苏徐州221116

出　　处：《煤矿安全》2025年第3期167-176,共10页Safety in Coal Mines

基　　金：江苏省研究生科研创新资助项目(KYCX24_2875)。

摘　　要：为研究浅埋近距离上覆房式采空区下开采煤柱失稳破坏问题,提出了煤柱稳定性控制方法,采用充填材料力学特性测试试验和FLAC^(3D)数值模拟相结合的方法进行研究。研究表明:风积沙充填材料压实试验压力达15 MPa时,基本达到密实状态;风积沙-黄土混合材料力学特性测试表明配比为风积沙∶黄土=1∶0.4时形变量较小,抗压能力强,并将该配比作为2305工作面固体充填材料配比;2305工作面采用垮落法开采时,煤柱发生大面积整体破坏,煤柱整体破坏率为93.7%;采用充实率为40%、60%、80%的固体充填开采时煤柱的整体破坏率分别为88.6%、14.9%、11.4%,结合研究结果充实率为60%时即可有效控制上覆采空区煤柱整体稳定。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 experiment of filing material and FLAC^(3D) 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.Combined 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 

分 类 号：TD824.7[矿业工程—煤矿开采]