煤炭工程 ›› 2018, Vol. 50 ›› Issue (12): 46-49.doi: 10.11799/ce201812012

• 施工技术 • 上一篇    下一篇

高应力软岩巷道支护失效机制及控制技术研究

孙珞   

  1. 北京工业职业技术学院
  • 收稿日期:2018-03-05 修回日期:2018-09-13 出版日期:2018-12-20 发布日期:2019-03-19
  • 通讯作者: 孙珞 E-mail:luoluosunno1@163.com

Study on Failure Mechanism and Control of High Stress and Soft Rock Roadway Support

  • Received:2018-03-05 Revised:2018-09-13 Online:2018-12-20 Published:2019-03-19

摘要: 针对高应力软岩巷道出现的变形、底鼓、开裂、冒顶等情况,从围岩强度特性、围岩流变特性、支护设计等方面分析了高应力软岩巷道支护失效机制,并结合新阳煤矿深部软岩巷道的工程地质条件及变形破坏机理,提出了一种高强联合支护技术,即:锚网索喷+注浆+ U 型钢支架。研究结果表明:该支护技术既可确保高应力软岩巷道支护结构与围岩的稳定,又能够对围岩的底鼓与变形进行控制,可取得良好的支护效果。

关键词: 高应力, 软岩巷道, 支护失效, 围岩控制

Abstract: Due to the complexity and diversity of rock mass engineering, the problem of high stress and soft rock roadway support is still outstanding, and the deformation and failure mechanism of surrounding rock needs to be further analyzed. Taking XinYang mine as an example, the paper analyzes the failure mechanism of high stress and soft rock roadway from the aspects of the strength characteristics of surrounding rock, rheological properties of surrounding rock, the shape of roadway section and the design of support scheme. Secondly, based on engineering geological conditions and deformation and failure mechanism of deep soft rock roadway in XinYang mine, a type of high strength combined support technology is proposed, namely: anchor injection + anchor net spray + grouting + U-shaped steel bracket. The results show that this technology can not only ensure the stability of surrounding rock and supporting structure of high stress soft rock roadway, but also can control the deformation and deformation of surrounding rock and obtain good supporting effect.

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