›› 2009, Vol. 30 ›› Issue (2): 425-428.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Back analysis of initial geostress field of Zijinshan gold and copper mine

XU Chuan-hua 1, 2, DIAO Hu2, REN Qing-wen1, LI Ru-zhong2   

  1. 1. College of Civil Engineering, Hohai University, Nanjing 210098, China; 2. Ma’anshan Iinstitute of Mining Research, Ma’anshan 243004, China
  • Received:2007-04-19 Online:2009-02-10 Published:2011-01-27

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Abstract:

Initial geostress is one of the key factors influencing stability of slope, underground cavity and foundation; and it is one of the elementary indexes required in engineering design. According to the measured geostress data of Zijinshan gold and copper mine, initial geostress field is derived from back analysis based on the support vector machine and simulated annealing. Firstly the support vector machine is used to substitute the time-consuming finite element analysis; secondly simulated annealing algorithm is used for the optimization of objective function for fear that the search often falls in one of the minimums and cannot go any further when the conventional mathematical optimization methods are employed. Through the comparison between computed and measured geostress values of measuring points, it is shown that the two are similar in values and directions, so that the results by the back analysis results are very close to the real geostress field; and it can satisfy design requirement.

Key words: Zijinshan gold and copper mine, initial geostress field, support vector machine, simulated annealing algorithm

CLC Number: 

  • TD 321
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