煤炭工程 ›› 2014, Vol. 46 ›› Issue (8): 38-40.doi: 10.11799/ce201408013

• 施工技术 • 上一篇    下一篇

孤岛工作面回风巷围岩控制与支护技术

何富连1,吴焕凯2,王宁博3,李通达3,许华威3   

  1. 1. 中国矿业大学(北京),资源与安全工程学院,采矿工程系,北京100083
    2. 太原理工大学 矿业工程学院,太原 山西 030024
    3. 中国矿业大学(北京)资源与安全工程学院,北京 100083
  • 收稿日期:2013-10-17 修回日期:2013-11-23 出版日期:2014-08-11 发布日期:2014-08-10
  • 通讯作者: 吴焕凯 E-mail:517613056@qq.com

Surrounding rock control and support technology on return airway in island mining face

  • Received:2013-10-17 Revised:2013-11-23 Online:2014-08-11 Published:2014-08-10

摘要:

以鹤壁四矿2604孤岛工作面回风巷为研究对象,采用FLAC3D模拟了巷道围岩的垂直应力,得出了巷道垂直应力与围岩深度的关系曲线。围岩垂直应力峰值点位置相差较大,顶板和采空侧围岩深部垂直应力趋于一定值,煤柱边缘垂直应力较小。针对围岩破碎,顶煤厚度大,提出了高强高预紧力锚杆与斜拉锚索梁结构联合控制技术,使浅部围岩与深部围岩形成统一的承载结构,矿压观测结果:顶底板相对移近量为215mm,两帮相对移近量为157mm,顶板离层量为35mm,为类似条件下的巷道支护提供借鉴。

关键词: 孤岛工作面, 围岩控制, 垂直应力, 支护

Abstract:

2604 island mining face return airway in Hebi NO.4 coal mine is selected as research object, roadway surrounding rock vertical stress is simulated by FLAC3D, The relation curve between the roadway surrounding rock depth and vertical stress is obtained. The vertical stress peak of surrounding rock has big difference, the depth vertical stress in roof and goaf side tends to be a constant value, the vertical stress of coal pillar is small. For broken surrounding rock, top coal is thicker, so the combined support technology of high strength and high pre-stressing bolt & diagonal cable beam is proposed, which makes the shallow and deep surrounding rock form a unified structure, mine pressure observations show that: roof-to-floor relative convergence is 215mm, both sides relative convergence is 157mm, the total roof separation was 35mm, which could provide reference to roadway support under the similar condition.

Key words: island mining face, surrounding rock control, vertical stress, support

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