煤层群下煤层开采工作面矿压显现规律研究
Research on the Manifestation Law of Mining Pressure in Coal Seam Mining Face Under Coal Seam Group
魏启明 1胡亚军 1张海龙 1杨宗泉 1王虎 1刘玉德2
作者信息
- 1. 国家能源集团宁夏煤业公司石槽村煤矿 宁夏 750000
- 2. 华北科技学院矿山安全学院 河北 065201
- 折叠
摘要
为研究煤层群下煤层工作面开采矿压规律,以石槽村煤矿 221001 工作面为研究对象,采用模拟与现场监测的方法,分析下煤层工作面来压特征.研究表明:1.工作面初次来压步距约为 45.4 m,应力峰值为 31.4 MPa,周期来压步距为 25.1 m,来压应力峰值为30.5 MPa,工作面顶板下沉量为 4.1 m.2.当工作面位置距离测点处超过 80 m时,巷道表面位移量几乎为 0;当工作面距测点 50 m范围内,巷道表面位移量陡增,直至测站15 m范围内,超前支承应力达到峰值状态.
Abstract
To study the mining pressure law of coal seam working face under coal seam group,the 221001 working face of Shicao village coal mine was taken as the research object,and simulation and on-site monitoring methods were used to analyze the pressure characteristics of the coal seam working face.Research has shown that:1.The initial pressure step distance of the working face is about 45.4 m,the peak stress is 31.4 MPa,the cyclic pressure step distance is 25.1 m,the peak pressure stress is 30.5 MPa,and the subsidence of the working face roof is 4.1 m.2.The distance be-tween the working face and measuring point exceeds 80 m,the displacement of the roadway surface is almost 0;When the deformation and failure rate of the surrounding rock of the roadway gradually increases sharply within a range of 50 m from the measuring point,the surface displacement of the roadway increases sharply until the peak state of the advanced support stress is reached within a range of 15 m from the measuring station.
关键词
煤层群/下煤层/矿压显现/超前支承压力Key words
coal seam group/lower coal seam/mineral pressure manifestation/advance support pressure引用本文复制引用
出版年
2025
NETL
NSTL
万方数据