煤炭工程 ›› 2018, Vol. 50 ›› Issue (5): 53-55.doi: 10.11799/ce201805015

• 施工技术 • 上一篇    下一篇

深部大采高超大断面切眼围岩控制技术及其应用

樊永东   

  1. 平煤股份十一矿
  • 收稿日期:2017-09-11 修回日期:2017-10-13 出版日期:2018-05-20 发布日期:2018-06-14
  • 通讯作者: 樊永东 E-mail:469512163@qq.com

Surrounding Rock Control Technology of Large Section Open-off Cut with Large Mining Height in No.11 Coal Mining of Pingdingshan Coal Corporation

fan yongdong   

  • Received:2017-09-11 Revised:2017-10-13 Online:2018-05-20 Published:2018-06-14
  • Contact: fan yongdong E-mail:469512163@qq.com

摘要: 为解决深部大采高超大断面切眼在施工过程中存在顶板下沉量大、两帮变形严重等问题,以平煤股份十一矿己16-17-24030切眼为工程背景,采用理论分析与现场监测方法,提出了切眼卸压减跨控顶与应力损失补偿支护技术,确定了适合大采高超大断面切眼掘进的“二次成巷、二次拉底、二次补充支护”施工工艺,并对施工效果进行检验。结果表明:小断面掘进切眼表面位移较小|二次扩帮其位移量增大,两帮移近量为322mm,顶板下沉量为174mm,并在切眼施工45d左右趋于稳定|该技术能够有效控制深部大采高超大断面切眼围岩变形。

关键词: 大采高, 超大断面切眼, 围岩控制, 二次成巷

Abstract: In order to solve the high roof subsidence and serious sides shrinkage problems occurred in the excavation process of the large cross section open-off cut, the method combined with theoretical analysis and field observation is applied to study the pressure-relief reducing span, roof Control and stress loss compensation support in Large Section Open-off Cut, determining construction technology by secondary cutting stone and secondary acid support, and identifying the construction effect. The result shows that the surface displacement of small section is minor, and secondary side slope extension increase obviously, the relationship is 174mm by roof and the displacement is 322mm by sides, which the large section open-off cut tend to stable in 45 days, and enable control surrounding rock deformation.

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