›› 2010, Vol. 31 ›› Issue (10): 3273-3279.

• Numerical Analysis • Previous Articles     Next Articles

Research on nonlinear large deformation and support measures for broken surrounding rocks of deep coal mine roadway

LIU Quan-sheng 1, 2, LU Xing-li1   

  1. 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. College of Civil Engineering and Architecture, Shandong University of Science and Technology, Qingdao, Shandong 266510, China
  • Received:2010-04-08 Online:2010-10-10 Published:2010-10-14

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Abstract:

Considering the broken status and the characters of strong nonlinear mechanical phenomenon of surrounding rocks at horizontal return airway in south of Gubei coal mine in Huainan mining area with a depth of 648m below, the deformation & damage process and nonlinear large deformation mechanism are studied by the universal distinct element code (UDEC). Based on the above research, the stepped combined support method is adopted. Through numerical simulation and field monitor measuring, the support method is analyzed and verificated. It is concluded that the deformation and damage process of broken surrounding rocks is gradual, after excavation. The main reason for nonlinear large deformation of roadway and destabilization of some parts is the collapse or sliding of local key blocks. Meanwhile, the long term stability of roadway can be ensured with the stepped combined support method. This support method is an effective method to control nonlinear large deformation of broken surrounding rocks of deep roadway.

Key words: deep mine roadway, broken surrounding rocks, key blocks, discrete element method, nonlinear large deformation, stepped combined support

CLC Number: 

  • TD 325
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