煤炭工程 ›› 2022, Vol. 54 ›› Issue (11): 24-28.doi: 10.11799/ce202211005

• 专题论坛 • 上一篇    下一篇

平行采动影响大巷“深卸-浅塑”围岩综合控制技术

周逸群,吴建星,张光亮,等   

  1. 1. 开采研究院
    2. 天地科技股份有限公司
  • 收稿日期:2022-10-18 修回日期:2022-11-15 出版日期:2022-11-15 发布日期:2023-03-09
  • 通讯作者: 任硕 E-mail:ckzhouyiqun@126.com

Comprehensive control technology of "deep unloading shallow plastic" surrounding rock in parallel mining roadway

  • Received:2022-10-18 Revised:2022-11-15 Online:2022-11-15 Published:2023-03-09

摘要: 针对受平行采动影响大巷持续大变形的问题,在全面地质力学测试基础上,分析巷道大变形特点及围岩控制难点,将回采巷道切顶卸压、大巷断底卸压与围岩注浆重塑技术相结合,形成了平行采动大巷“深卸-浅塑”围岩综合控制技术。现场应用结果显示:煤柱应力整体升高幅度可控|工作面回采过程中隅角基本无悬顶|巷道顶底板最大变形量为216mm,两帮最大变形量为296mm、锚杆索受力稳定、顶板总离层值小于20mm,较好实现被保护大巷围岩控制的目的。

关键词: 平行采动, 围岩控制, 回采巷道卸压, 大巷断底卸压, 围岩注浆重塑

Abstract: Aiming at the problem of large deformation of roadway, based on geomechanical testing, the characteristics of parallel mining roadway and the difficulties in rock control are analyzed. The basic top beam model is used to calculate that the pressure relief height of the deep hole , and the pressure relief of the mining roadway, the pressure relief of the floor in the different roadway and the grouting surrounding rock remodeling technology are combined to form the "deep unloading shallow plastic" surrounding rock comprehensive control technology of the parallel mining roadway. The monitoring results of roadway ground pressure show that the coal pillar stress is stable in time after the mining increase.Basically, there is no suspended roof on that day, which effectively reduces the impact of mining advance pressure on the adjacent main roadway; The maximum deformation and separation value of roadway is stable.The surrounding rock control of main roadway is well realized.

中图分类号: