摘要
针对崔家寨矿6#煤层深部开采地质条件,通过在工作面区段煤柱内沿宽度方向布置应力传感器,实测煤柱受采动影响全过程的应力演化特征。继而采用FLAC3D模拟软件分析不同宽度煤柱应力场状况及巷道围岩整体稳定性,数值模拟与煤柱应力现场实测结果综合对比,将崔家寨矿6#煤层深部动压区段煤柱尺寸由经验值20-23 m缩减到5-7 m。现场实践表明,煤柱宽度缩减后,能确保煤柱本身及巷道围岩整体稳定,且提高了资源回收率。
According to the deep mining geological conditions of the No. 6 coal seam in Cuijiazhai Coal Mine,the stress sensors are arranged along the width direction of the sectional coal pillar. The stress field characteristics of the coal pillar are measured during mining advancing. Based on the FLAC3 Dnumerical simulation software,stress field characteristics of coal pillar and overall stability of roadway surrounding rock are investigated at different widths of coal pillar. In comparison with the results of numerical simulation and in- site measures,the reasonable width of the coal pillar reduces to 5 - 7 m from the experience value of 20 - 23 m. Field practice shows that the method of decreasing coal pillar width can control the stability of coal pillar and roadway surrounding rock effectively and improve resource recovery.
出处
《煤矿安全》
CAS
北大核心
2015年第7期59-62,共4页
Safety in Coal Mines
基金
河北省矿井灾害防治重点实验室资助项目(KJZH2013S03)
中央高校基本科研业务费资助项目(3142013035)
关键词
区段煤柱
合理宽度
采动应力
围岩控制
数值模拟
塑性区
sectional coal pillar
reasonable width
mining-induced stress
surrounding rock control
numerical simulation
plastic zone
