煤炭工程 ›› 2017, Vol. 49 ›› Issue (2): 78-81.doi: 10.11799/ce201702025

• 研究探讨 • 上一篇    下一篇

高煤帮破坏机理及控制技术

褚晓威   

  1. 中国煤炭科工集团天地科技股份有限公司开采设计事业部
  • 收稿日期:2016-10-08 修回日期:2016-11-14 出版日期:2017-02-09 发布日期:2017-03-09
  • 通讯作者: 褚晓威 E-mail:chuxiaowei2003@163.com

Failure mechanism and control technology of high coal sides

  • Received:2016-10-08 Revised:2016-11-14 Online:2017-02-09 Published:2017-03-09

摘要: 针对高煤帮巷道两帮的大变形问题,以霍尔辛赫煤层条件为例,数值模拟分析了其煤帮破坏机理,即在围岩压力下产生压剪破坏,四角形成强剪切区,连接成似“C”形剪切带,上部煤体斜向滑移,在巷帮中部变形最大|采用锚杆锚索联合支护后,剪切应变值及塑性破坏范围均有所减小。根据模拟结果及相关成功工程经验,提出煤帮层次化支护技术,即锚索或注浆锚索配合锚杆支护。在西辅运大巷进行了强力锚杆锚索控制高煤帮的现场试验,监测表明巷帮锚索有效控制了帮部顶角剪切滑移造成的失稳,巷道变形和离层均较小,取得较好支护效果。

关键词: 高煤帮, 压剪破坏, 剪切应变增量, 层次化支护

Abstract: Abstract: In order to reveal and solve the large deformation of sensitive coal sides in high sides, dynamic pressure and gob-side entry retaining roadways, failure mechanism of coal sides in Huoerxinhe model was compression-shear failure under surroundings pressure, strong shearing zone in four corners and “C” shearing belt in sides. Top coal slipped inclined and largest deformation appeared in the middle of both sides. Hierarchical support was put forward, who means rock blot cooperating cable or injecting cable. Site experiment was carried out in west auxiliary transportation roadway. Monitoring data showed that side cables controlled the shearing slip of top sides; supporting effect was good with small deformation and roof separation.

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