摘要
为研究上位煤层采空后遗留边界煤柱对下位煤层巷道布置影响。本文采用数值模拟、理论分析和现场观测等方法对下位煤层巷道围岩应力分布、支护方案进行研究。研究结果表明:下位煤层巷道掘进后,在上位煤柱垂直集中应力作用下,两帮围岩出现明显应力集中区,峰值应力约为2.4倍原岩应力,围岩变形量较大;锚网索联合支护方案适用于受煤柱影响下的下位煤层巷道围岩,围岩整体变形明显减小,支护效果良好。研究结果对近距离煤层开采支护设计具有较好的指导意义。
To study the impact of residual boundary coal pillars on the layout of lower coal seam tunnels after goaf extraction in the upper coal seam.In this paper,numerical simulation,theoretical analysis and field observation are used to study the stress distribution and support scheme of surrounding rock in lower coal seam roadway.The research results show that after the excavation of the lower coal seam roadway,under the vertical concentrated stress of the upper coal pillar,there are obvious stress concentration areas in the surrounding rock of the two sides,with a peak stress of about 2.4 times the original rock stress,and a large deformation of the surrounding rock;The anchor mesh cable combined support scheme is suitable for the surrounding rock of the lower coal seam roadway under the influence of coal pillars.The overall deformation of the surrounding rock is significantly reduced,and the support effect is good.The research results have good guiding significance for the design of support for close range coal seam mining.
作者
田军
刘超
雷水生
彭瑞
郑迪
刘江
杨学红
TIAN Jun;LIU Chao;LEI Shuisheng;PENG Rui;ZHENG Di;LIU Jiang;YANG Xuehong(Shandong Energy Zaozhuang Mining Group Sanhekou Mining Co.,Ltd.,Jining 277605,China;Hebei Key Laboratory of Mine Disaster Control,North China Institute of Science and Technology,Yanjiao 065201,China)
出处
《华北科技学院学报》
2024年第5期12-19,共8页
Journal of North China Institute of Science and Technology
基金
河北省自然科学基金(E2021508008)
中国科协青年人才托举工程项目(No.YESS20210414)
国家自然科学基金资助项目(51804119)。
关键词
采空区
近距离煤层
支护
数值模拟
围岩
goaf
close range coal seams
support
numerical simulation
surrounding rock
作者简介
田军(1983-),男,山东枣庄人,山东能源枣矿集团三河口矿业有限责任公司掘进副总工程师,研究方向:巷道支护设计。E-mail:jt-100@163.com;通讯作者:郑迪(1996-),男,河南开封人,华北科技学院在读硕士研究生,研究方向:安全工程。E-mail:7373786247@qq.com。
