›› 2011, Vol. 32 ›› Issue (10): 3058-3064.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Study of mechanism of rock mass deformation and failure ahead of working face on supporting zone

QIAN Yue-hong1, 2, WANG De-rong1, LI Jie1, 3, CHEN Wen-tao1   

  1. 1. Engineering Institute of Engineering Corps, PLA University of Science and Technology, Nanjing 210007, China; 2. Unit 92303 of PLA, Jiaonan, Shandong 266405, China; 3. Unit 65525 of PLA, Dalian, Liaoning 116000, China
  • Received:2011-02-03 Online:2011-10-10 Published:2011-10-13

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Abstract: The shear slippage failure theory is used to study the stress-strain state in terrane ahead of working face; and then the main factors that cause volumetric deformation are analyzed. By means of the volumetric deformation state and its consequences, the mechanism of zonal disintegration phenomenon is explained and the occurrence conditions are derived. The results show that the main reason for volumetric deformation in supporting zone of deep rock mass is that the different pressure in prime stress space leads to the rock mass’s spalling, which explains the zonal disintegration; meanwhile, according to the characters of the shallow or deep rock engineering, the computation formula containing the column strength of rock mass is used to define the shallow or deep rock engineering. As to the thin rock terrane, the Prandtl solution is a good approximate one.

Key words: supporting pressure, slippage failure theory, deep tunnel, zonal disintegration phenomenon

CLC Number: 

  • TD 32
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