煤炭工程 ›› 2017, Vol. 49 ›› Issue (4): 36-38.doi: 10.11799/ce201704012

• 施工技术 • 上一篇    下一篇

缓斜厚煤层回采巷道围岩控制技术研究

镐振   

  1. 中国矿业大学(北京)
  • 收稿日期:2016-05-15 修回日期:2016-06-27 出版日期:2017-04-09 发布日期:2017-05-16
  • 通讯作者: 镐振 E-mail:569746581@qq.com

Study on control technology of surrounding rock of gateway in gently inclined thick coal seam

  • Received:2016-05-15 Revised:2016-06-27 Online:2017-04-09 Published:2017-05-16

摘要: 为控制缓斜厚煤层回采巷道围岩变形,以华盖山煤矿201工作面回风巷为工程背景,采用数值模拟方法研究了回采巷道变形破坏特征,结果显示倾斜厚煤层巷道围岩破碎区和塑性区范围较大,并且破碎区主要集中于顶板,浅部围岩为剪切-拉伸破坏,同时锚网索喷支护技术能够有效控制在该地质条件下的巷道围岩变形。工程实践表明,锚网索喷支护巷道两帮和顶底板最大移近量分别为105mm和127mm,并且现场没有出现锚杆(索)失效情况,可为类似条件下的巷道围岩控制提供参考。

关键词: 缓斜厚煤层, 回采巷道, 围岩控制, 锚网索喷支护, 数值模拟

Abstract: In order to control the deformation of surrounding rock of gateway in gently inclined thick coal seam, deformation and failure characteristics of gateway is studied by way of numerical simulation in the engineering background of 201 tailgate in Huagaishan Colliery. The result indicates broken zone and plastic zone of surrounding rock of gateway in gently inclined thick coal seam is large, broken zone mainly focuses on the roof, and shallow surrounding rock is damaged by shear and tensile. Furthermore, spray anchor net cable supporting technology can effectively control the deformation of gateway surrounding rock under the geological conditions. Engineering practice shows that the maximum convergence of gateway with the support of side walls and roof-floor is 102 mm and 124 mm respectively, and there is not bolt or anchor failure in the site, which can provide reference for surrounding rock control of roadway with similar conditions.

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