小煤柱工作面低位放顶煤技术覆岩运动与变形控制研究  

Research on overlying rock movement and deformation control of low-level top coal caving technology in small pillar working face

作　　者：雷明 LEI Ming(Innovation and Entrepreneurship Center,Shanxi Research Institute of Science and Technology,Jinneng Holding Group,Datong 037100,China)

机构地区：[1]晋能控股集团山西科学技术研究院双创中心,山西大同037100

出　　处：《煤炭科技》2022年第3期29-35,共7页Coal Science & Technology Magazine

摘　　要：为揭示中深度埋深厚煤层低位放顶煤小煤柱工作面开采过程中覆岩运动规律,通过解读相似模拟理论,充分利用实验设备尺寸,综合现场生产流程,获得最佳模拟方案。具体做法:利用模拟理论与实际生产相互转换,运用相似材料的锚杆、锚索和护表体系等搭配组合成常规支护体系,将其应用于小煤柱巷道,发现存在的问题缺陷,并制定针对性的补强支护措施,同时在晋能控股煤业集团某矿进行生产实践。现场监测显示,巷帮峰值移近量1188 mm,煤柱应力呈先升后降趋势,峰值近22 MPa,且浅部应力具有滞后性,充分发挥煤柱自承作用,满足生产需求。In order to reveal the movement law of the overlying rock during the mining process of the small coal pillar working face in the low-level top coal caving in the medium-depth buried deep coal seam,the optimal simulation scheme was obtained by interpreting the similar simulation theory,making full use of the size of the experimental equipment,and synthesizing the field production process.Specific methods:use the simulation theory and actual production to convert each other,use similar materials such as anchor rods,anchor cables and watch protection systems to form a conventional support system,apply it to small coal pillar roadways,and find out the existing problems and defects.Formulate targeted reinforcement and support measures,and at the same time carry out production practice in a mine of Jinneng Holding Coal Industry Group.On-site monitoring shows that the peak movement of the roadway side was 1188 mm,the coal pillar stress increased first and then decreases,with a peak value of nearly 22 MPa,and the shallow stress had a hysteresis,giving full play to the self-supporting role of the coal pillar to meet production needs.

关 键 词：相似模拟理论 小煤柱巷道 支护体系 监测 

分 类 号：TD823[矿业工程—煤矿开采]