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金属矿山 ›› 2018, Vol. 47 ›› Issue (10): 7-12.

• 采矿工程 • 上一篇    下一篇

破碎巷道锚网喷支护技术研究

时磊1,王满2,3,汪龙2,3,刘权威2,3,黄滚2,3   

  1. 1. 新疆天华矿业有限责任公司,新疆 尼勒克 835700;2. 煤矿灾害动力学与控制国家重点实验室,重庆400044;3. 重庆大学资源及环境科学学院,重庆 400044
  • 出版日期:2018-10-15 发布日期:2018-11-09

Combination of Bolting, Meshing and Shotcreting for Supporting of Broken Rock Mass Roadway

Shi Lei1,Wang Man2,3,Wang Long2,3,Liu Quanwei2,3,Huang Gun2,3,   

  1. 1. Xinjiang Tianhua Mining Co., Ltd , Nileke 835700, China; 2. State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing 400044, China;3. College of Resources and Environmental Sciences, Chongqing University, Chongqing 400044, China
  • Online:2018-10-15 Published:2018-11-09

摘要: 破碎岩体巷道的支护效果关系矿山安全和支护成本,是矿业学界和业界关注和研究的重点。以某铁矿为工程背景,运用破裂区和塑性区理论对巷道围岩破碎岩体变形进行了理论分析,采用超声波仪器对破碎岩体巷道围岩松动圈范围进行了测定。在此基础上,基于松动圈理论提出了锚杆、金属网和喷射混凝土结合的组合式支护方式,并辅以长锚索补强,形成短锚成拱、长锚悬吊的支护方式。通过FLAC3D数值软件分析不同锚杆间排距下的支护效果,结果表明:0.7 m×0.8 m的锚杆支护间距不仅可减少塑性区和变形量,同时能有效缩小自稳时间,支护效果良好。

关键词: 破碎巷道, 支护技术, 数值模拟, 工程应用

Abstract: The supporting effect of broken rock mass roadway is related to the mine safety and the supporting cost, which is the key focused by mining academia and industry. Taking an iron mine as engineering background, the deformation of the broken rock mass roadway was analyzed theoretically by using the theory of fracture zone and plastic zone, and the range of loose zone in the broken rock mass roadway was measured by ultrasonic instrument. Then, the combined support method of bolt, metal mesh and shotcrete is proposed based on the theory of loosening circle. A support of short anchor arching and long anchor suspending was formed with long anchor cable supplemented. The support effect under different row spacing of bolts was analyzed by FLAC3D numerical software. The results showed that the support spacing of 0.7 m ×0.8 m can reduce the plastic zone and deformation, and also effectively lower the self-stability time, with good support effect.

Key words: Broken rock mass roadway, Support technique, Numerical simulation, Engineering application