Numerical Simulation of Squeezing Failure in a Coal Mine Roadway due to Mining-Induced Stresses

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• 作者：Fuqiang Gao ; Doug Stead ; Hongpu Kang
• 关键词：Squeezing ; Coal mine ; Roadway ; Discrete element method ; Mining ; induced stress
• 刊名：Rock Mechanics and Rock Engineering
• 出版年：2015
• 出版时间：July 2015
• 年：2015
• 卷：48
• 期：4
• 页码：1635-1645
• 全文大小：4,045 KB
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• 作者单位：Fuqiang Gao (1) (2)
  Doug Stead (1)
  Hongpu Kang (2)
  
  1. Engineering Geology and Resource Geotechnics Group, Simon Fraser University, Burnaby, BC, Canada
  2. National Key Laboratory of Coal Mining and Clean Utilization (China Coal Research Institute), Beijing, China
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Geophysics and Geodesy
  Civil Engineering
  
• 出版者：Springer Wien
• ISSN：1434-453X

文摘

Squeezing failure is a common failure mechanism experienced in underground coal mine roadways due mainly to mining-induced stresses, which are much higher than the strength of rock mass surrounding an entry. In this study, numerical simulation was carried out to investigate the mechanisms of roadway squeezing using a novel UDEC Trigon approach. A numerical roadway model was created based on a case study at the Zhangcun coal mine in China. Coal extraction using the longwall mining method was simulated in the model with calculation of the mining-induced stresses. The process of roadway squeezing under severe mining-induced stresses was realistically captured in the model. Deformation phenomena observed in field, including roof sag, wall convexity and failed rock bolts are realistically produced in the UDEC Trigon model.