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| The Multi-criteria Evaluation of Rockburst Proneness on Deep Buried Large Tunnel |
| HUANG Yu-ren 1，MAO Jian-xi 1，LIN Chao-yang 1，LI Shu-line 1，HU Jing-yun 2 |
| 1 .Xiamen University，Xiamen，Fujian 361005，China; 2. Changsha Institute of Mining Research Co. Ltd，Changsha, Hunan 410012，China |
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Abstract Research purposes:North Wuyi Mountain of high-speed railway is a single hole bidirectional tunnel，and the maximum depth of the tunnel is as deep as 1100 meters, so it belongs to high stress area that may cause rockburst in the process of excavation. The indoor experiments about rockburst proneness of rock samples which was collected in high stress area of the tunnel are recorded in this paper, and some property parameters of rock like the uniaxial compressive strength were got combining acoustic emission testing. Four kinds of single index evaluation method were used to evaluate rockburst proneness firstly，including the intensity of brittleness coefficient method，the deformation brittleness coefficient method，the elastic strain energy method and the tangential stress criterion. Then the comprehensive evaluation method of fuzzy mathematical was used to evaluate.
Research conclusions:(1)Combined with acoustic emission monitoring technology，we can get two indexes more accurately than conventional experiment. (2)According to rock properties and surrounding rock stress，we increase the evaluation indicator of deformation brittleness coefficient method. It showed that the results from the comprehensive evaluation method of fuzzy mathematical are more in line with the actual situation of the rock burst of tunnel compared with the single index evaluation.(3)The research result provides a feasible method to predict rockburst and it is significant to prevent and control of rockburst in advance for similar engineering.
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Received: 11 December 2013
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2014, Vol. 31 
