›› 2008, Vol. 29 ›› Issue (8): 2111-2114.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Analysis of low-angle structural-plane appearance from effect of moment of force and groundwater

SUN Qiang, ZHANG Xiao-ke, QIAN Hai-tao, YANG Ji-hong, WANG Yuan-yuan   

  1. Key Laboratory of Engineering Geomechanics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China)
  • Received:2006-11-09 Online:2008-08-11 Published:2013-08-02

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Abstract: The model of moment of force is introduced to the rock shearing failure; and the shearing failure process is analyzed. The moment model is used to explain the formation of low-angle structural-plane. When the rock has the shearing failure, the shear band has a certain width. On the shear band, shear stress and the support strength are not the even distribution. There is a process alignment procedure in cuts; and the stress concentrated in some part caused the existence of shearing moment. Along with increasing of , the supports strength and the shearing force all increase; the non-uniform distribution appears. The stress is concentrated partially; and the rock appears the partial failure. When the shearing moment is bigger than the support moment, the macroscopic shearing failure appears. Based on the destruction effect of groundwater, the change of interface with the variety of groundwater is analyzed. Along with the increasing of hydraulic pressure, the effective pressure and the contacted area rate of the structural surface and under the crag body changes slightly, the critical angle of the steady destruction reduces. So the rock block is easy to lose its steadily.

Key words: rock mechanics, low-angle structural-plane, shear band, moment of force, rock-body state, groundwater

CLC Number: 

  • TD 313+.5
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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