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Volume 34 Issue 9
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ZOU Yang, LI Xi-bing, ZHOU Zi-long, YIN Tu-bing, YIN Zhi-qiang. Energy evolution and stress redistribution of high-stress rock mass under excavation distribution[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(9): 1677-1684.
Citation: ZOU Yang, LI Xi-bing, ZHOU Zi-long, YIN Tu-bing, YIN Zhi-qiang. Energy evolution and stress redistribution of high-stress rock mass under excavation distribution[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(9): 1677-1684.
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Energy evolution and stress redistribution of high-stress rock mass under excavation distribution

  • 1. School of Resources and Safety Engineering, Central South University, Changsha 410083, China; 2. Hunan Key Laboratory of Resources Exploitation and Hazard Control for Deep Metal Mines, Changsha 410083, China; 3. School of Mineral and Safety, Anhui University of Science and Technology, Huainan 232001, China

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  • Received Date: July 21, 2011
  • Published Date: October 09, 2012
    Graphical Abstract
    • Abstract
  • In order to reveal the mechanism of the occurrence of deep engineering catastrophe and the influence of various factors on excavation perturbing effect, the models with different original stress states and different excavation sections are established by using the distinct element numerical simulation software PFC. Through explicit calculation, the kinetic release curves of high-stress rock mass under various circumstances are gained, and the peak and final stable values of the obtained curves are regarded as energy indices, which are used for representing the disturbance intensity and the stability degree of the excavation system respectively. The analysis based on these indices shows that the excavation with a circular cross section will induce the minimum disturbance effect under a nearly hydrostatic pressure stress state. The stress redistribution characteristics of high original stress rock mass excavated by different sections are also studied. Through the inspection of stress redistribution course which is regarded as an unloading process, the influence mechanisms of the original rock mass stress state and the geometry of excavation section on the stress redistribution are revealed ultimately.
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    • References (22)
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