Research on the Prediction of Rock Outburst for Deep-burying Long Tunnel
WANG Bo1, HE Chuan1, WU De-xing2
1. Southwest Jiaotong University Chengdu, Sichuan 610031, China; 2. Zhejiang Provincial Transport Plan Design&Research Institute, Hangzhou, Zhejiang 310006, China
Abstract：Research purposes: The maximal burying depth of Cangling Tunnel is about800 m and the integrality and strength of rock in the tunnelwere perfec,t so rock outburst would happen underhigh pressure of surrounding rock after the tunnel excavation. In order to ensure safety and exactly forecast the rock outburstof the rock in unexcavated zone in frontof the working face, with the means of theoretic analysis and real tes,t the rock outburstofCangling Tunnelwas predicted in two phases.
Research conclusions:From the prediction of rock outburst in two phases, it is known that compared with the state in the pas,t the length ofslightrock outburstareawas reduced, but the length ofmedium rock outburstareawas almost the same, and generally the rock outbursthappens in the side wall of tunne.l Therefore, criterion ofRussense is the most suitable toCangling Tunne,l and the stress of internal structure in the tunnel obtained from the research in the early -stage is comparatively accurate. With the means of theoretic analysis and real test and combined with the prediction mode for rock outburstin two phases, the rock outburstin certain area in frontof theworking face ispredicted correctly.Thismethod is feasible forpredicting the rock outburst.
汪 波，何 川，吴德兴. 深埋特长隧道岩爆预测研究[J]. 铁道工程学报, 2009, 26(11): 45-49.
WANG Bo, HE Chuan, WU De-xing. Research on the Prediction of Rock Outburst for Deep-burying Long Tunnel. 铁道工程学报, 2009, 26(11): 45-49.
2009, Vol. 26 
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