采矿与安全工程学报 ›› 2016, Vol. 33 ›› Issue (2): 260-264.

• 论文 • 上一篇    下一篇

TBM 施工煤矿深埋硬岩巷道围岩稳定性分析及工程应用

  

  1. 1.安徽理工大学土木建筑学院,安徽 淮南 232001;2.淮南矿业集团,安徽 淮南 232001; 3.安徽大学资源与环境工程学院,安徽 合肥 230039
  • 收稿日期:2015-05-30 出版日期:2016-03-15 发布日期:2016-04-22
  • 作者简介:唐彬(1987—),男,安徽省淮南市人,博士研究生,从事矿山岩土工程方面的研究。
  • 基金资助:

    国家自然科学基金项目(51134012);高等学校博士学科点专项科研基金项目(20133415110004)

Stability analysis and engineering application of TBM deep coal mine roadway and surrounding rock

  • Received:2015-05-30 Online:2016-03-15 Published:2016-04-22

摘要: 针对首次立井煤矿 TBM 掘进硬岩巷道工程应用实际,进行了巷道围岩稳定性分析和施工信息化监测,并采用 ABAQUS 有限元数值软件研究了巷道围岩位移场、应力场和塑性区的分布规律,分析了拟定支护方案的巷道围岩稳定性。结果表明,巷道顶部的最大下沉量为 33.26 mm,巷道围岩的塑性区范围为 0.8~1.2 m。确定支护方式为锚网支护。在试验巷道掘进过程中,进行了围岩内部裂隙发育情况、巷道收敛变形和锚杆受力监测。巷道顶板围岩破损深度达 1.5 m,两帮最大收敛量为 12 mm,锚杆轴力变化范围为 43.1~65.1 kN。TBM 施工硬岩巷道月进尺达 404 m,相比传统的钻爆法和综掘法单进提高 5~10 倍,工程应用表明,该工法安全高效。

关键词: 煤矿, 深埋巷道, 全断面掘进机(TBM), 围岩稳定性, 现场监测

Abstract: Aiming at practice of the first shaft coal mine TBM, the roadway surround rock stability analysis and informative monitoring have been carried out. The distribution law of displacement, stress and plastic zone have also been studied and the stability of support design has been verified by ABAQUS finite element numerical software. Results have indicated that the maximum deformation on the roof is 33.26 mm and the range of plastic zone is 0.8-1.2 m. The supporting way has been chosen as the mode of bolt support. Fracture developing condition inside surrounding rock, roadway convergence and deformation and bolt stress have all been measured and the results have illustrated that crush zone ranger reaches up to 1.5 m over roof, the maximum horizontal convergence is 12 mm, and that bolt stress ranges from 43.1 to 65.1 kN. The maximum penetration rate of TBM is 404 m per month which is 5-10 times that of conventional drilling and blasting or roadheader, and the TBM excavation has also been proved to be safety and efficient according to engineering application.

Key words: colliery, deep roadway, tunnel boring machine (TBM), surround rock stability, in-situ measurement