›› 2006, Vol. 27 ›› Issue (S1): 179-182.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Analysis of dynamic stress intensity factor of rock mass under excavation unloading in underground caverns

WU Liang, ZHU Hong-bing, WANG Xiu-juan   

  1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
  • Received:2006-04-04 Published:2006-12-15

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Abstract: Based on linear elastic assumption and ANSYS software, taking the excavation of underground powerhouse of Longtan Project for example, the dynamic stress intensity factor under blasting load and unloading of initial stress is calculated. The results show that the crack propagation and rock mass damage near borehole are due to blasting load in the process of fragmentizing rock by blasting in medium high ground stress region. But the dynamic unloading of initial stress is the key factor which induces the loose of reserved rock in medium long region and the propagation of original crack.

Key words: rock mechanics, blasting loading, initial stress, dynamic factor

CLC Number: 

  • TU 452
  • 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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