煤炭工程 ›› 2021, Vol. 53 ›› Issue (3): 49-45.doi: 10.11799/ce202103009

• 设计技术 • 上一篇    下一篇

基于高强吸能锚杆支护的煤柱合理留设尺寸研究

林继凯1,张彦2,郝阳3   

  1. 1. 山西长治经纺煤业
    2. 中国矿业大学
    3. 中国矿业大学深部岩土力学与地下工程国家重点实验室
  • 收稿日期:2020-04-24 修回日期:2020-06-07 出版日期:2021-03-20 发布日期:2021-05-10
  • 通讯作者: 张彦 E-mail:yanzhangcalling@126.com

Simulation Research on Reasonable Coal Pillar Based on High Energy Absorbing Rock Bolt

LIN JIKAI1,ZHANG YANYANHao Yang   

  • Received:2020-04-24 Revised:2020-06-07 Online:2021-03-20 Published:2021-05-10
  • Contact: ZHANG YANYAN E-mail:yanzhangcalling@126.com

摘要: 了提高煤炭回采效率、实现正常回采和顺利完成工作面安全接替的生产要求,针对经纺煤业3-508综放工作面25m煤柱尺寸进行优化,自主设计研发了高强稳阻吸能锚杆,并对其力学特性进行了试验研究,提出了高强稳阻支护方案,通过FLAC3D模拟不同支护方案和不同煤柱尺寸下的巷道围岩垂直应力变化、塑性区分布规律和巷道变形差异对比得出结论。研究表明:与经纺煤业现有支护方案对比,采用新型高强稳阻吸能锚杆支护技术可以提高巷道围岩的稳定性,将原有25m煤柱尺寸缩减为5~10m,减少了煤炭资源的浪费。研究结果可以为经纺煤业留设合理煤柱尺寸和巷道稳定性控制提供指导意见和科学依据。

关键词: 综放工作面, 煤柱宽度, 高强稳阻吸能锚杆, 锚杆支护, 静态拉拔测试, 围岩控制

Abstract: Abstract:Based on improving coal recovery efficiency, achieving normal recovery and successfully completing replacement of working face for safety production requirements, 25m coal pillar of 3-508 fully mechanized working face in Jingfang coal mine has been optimized and proposed high-strength stability support scheme. A new energy absorbing rock bolt has been developed and its mechanical properties have been investigated. A simulation model in the mining process is established by FLAC3D to study the differences of the surrounding rock stress,deformation and plastic zone distribution law under different pillar widths and different support methods.The results show that the coal pillars width can be decreased to 5-10m with supporting by the new high energy absorbing rock bolt, which means more coal resource can be exploited. The results will provides important scientific basis and instructions on the width of coal pillar and a new supporting method to keep stability of surrounding rocks in JingFang coal mine.