采矿与安全工程学报 ›› 2013, Vol. 30 ›› Issue (5): 653-658.

• 论文 • 上一篇    下一篇

采动环境下巷道围岩破裂演化规律及其控制技术研究

  

  1. 1.安徽理工大学能源与安全学院,安徽 淮南 232001; 2.中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏 徐州 221116
  • 出版日期:2013-09-15 发布日期:2013-10-01
  • 作者简介:张华磊(1983-),男,山东省聊城市人,博士,从事采动岩体力学与巷道支护方面的研究。 E-mail:hlzhang1122@126.com Tel:13721127526
  • 基金资助:

    国家重点基础研究发展计划(973)项目(2010CB226805);国家自然科学基金项目(51074004,51274191);安徽省自然科学基金重点项目(11040606M102);安徽理工大学青年教师科学研究基金项目(2012QNZ14)

Study on failure evolution laws and control technology of roadway surrounding rock under mining circumstances

  • Online:2013-09-15 Published:2013-10-01

摘要: 针对采动环境下巷道围岩经反复维修仍无法满足正常使用的现状,以受采动影响海孜煤矿 86 采区回风上山为工程背景,建立底板采动影响区内某一点受力状态演化的力学模型,得出采动区巷道处于非等压受力状态,据此建立了非等压状态下巷道受力的弹塑性力学模型,推导出底板巷道围岩塑性区宽度计算公式,并针对采动区巷道制定以螺纹钢注浆锚杆为支护体系核心的预加固方案。结果表明,当底板巷道采用以注浆锚杆为核心的支护体系加固后,由上覆工作面开采引起的底板巷道围岩变形可得到有效控制,非等压受力状态下巷道围岩塑性区宽度计算公式合理。

关键词: 采动环境, 破裂演化机制, 控制技术

Abstract: Aiming at the situation that the surrounding-rock of the tunnel cannot meet the requirements for normal production after being repaired for several times, with No.86 return airway of Haizi colliery affected by mining as the background, the mechanical model of a special point in the floor mining- affected zone was established. It is concluded that the tunnel was in the asymmetric pressure force state, thus elastic-plastic model of the tunnel stress was established in the asymmetric pressure force state, the plastic zone width calculation formula of the tunnel surrounding rock was deduced and reinforcement schemes taking thread steel grouting bolt as the core were made. The results showed that after the floor tunnel was reinforced with supporting system taking the grouting blot as the core, the deformation of surrounding rock, caused by mining in the overlying working face, could be effectively controlled and the plastic zone width calculation of the tunnel surrounding rock was rational.

Key words: mining circumstances, failure evolution mechanisms, control technology