›› 2009, Vol. 30 ›› Issue (6): 1693-1698.

• Geotechnical Engineering • Previous Articles     Next Articles

Research on reinforced technology for deep soft rock and dynamic pressurized roadway under high stress

FANG Xin-qiu 1, 2，HE Jie 1, 2，HE Jia-sheng 1, 2   

  1. 1. School of Mines, China University of Mining and Technology, Xuzhou 221008, China; 2. State Key Laboratory of Coal Resources and Safe Mining, Xuzhou 221008, China
  • Received:2008-05-29 Online:2009-06-10 Published:2011-03-09

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Abstract:

The support for deep soft rock and dynamic pressurized roadway is a major technical challenge. The -620 soft rock roadway in Kongzhuang Mine which is located in the high stress areas is a typical example, and it is affected by No. 7335 hydraulic mining face above, No. 8331 mining face, and the fault as well; the damaged condition and the factors that cause the damage are analyzed. The main roadway deformation rules affected by mining are simulated, the change and the influence area of stress state of main roadway are obtained. The thought of reinforcing main roadway is proposed; the reinforcement is optimized; and the reasonable parameters of reinforcement are determined. The research results indicate that the main roadway deformation can be effectively controlled by adopting the bolt-mesh-anchor-concrete and bolt-grouting combined support technology, which grouts main roadway within a radius of 2 m with a new patent grouting anchor. Through the comparison of the mechanical properties of surrounding rock before and after grouting, live shooting and strata control observation, the underground industrial test shows that the -620 main roadway has been effectively controlled.

Key words: high stress, soft rock, dynamic pressure, bolt-grouting

CLC Number: 

  • TD 353
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