›› 2012, Vol. 33 ›› Issue (3): 827-834.

• Geotechnical Engineering • Previous Articles     Next Articles

Research on large deformation mechanism and control method of deep soft roadway in Zhuji coal mine

HUANG Xing1, LIU Quan-sheng1, 2, QIAO Zheng2   

  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:2010-10-26 Online:2012-03-10 Published:2012-03-12

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Abstract: In order to explore the large deformation mechanism and control method of deep soft roadway, analysis is made based on the engineering background of level -885 m east wing rail roadway of Zhuji Coal Mine, Huainan mining area. This roadway is a typical deep soft rock of high geostress, of which the surrounding rock becomes extremely unstable, showing strong nonlinear deformation characteristics and high deformation rate after excavation. Rating of the large deformation is firstly made. The surrounding rock stress field and displacement field are analyzed by Hoek-Brown elastoplastic constitutive model. Considering the strength of surrounding rock, the influences of disturbance, the cross-section shape, the roadway deformation mechanism are revealed finally. Optimized supporting method is proposed which is paid great attention to the floor supporting and bottom shearing support. Numerical simulation and field monitoring show that the new method obtained good effect and it’s a kind of effective method to controlling large deformation of surrounding rocks of deep roadway.

Key words: deep mine, soft roadway, large deformation, floor supporting, bottom shearing support

CLC Number: 

  • TD 313+1
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