深埋特长隧道岩爆预测研究  

Research on the Prediction of Rock Outburst for Deep-burying Long Tunnel

作　　者：汪波[1] 何川[1] 吴德兴 

机构地区：[1]西南交通大学,成都610031 [2]浙江省交通规划设计研究院,杭州310006

出　　处：《铁道工程学报》2009年第11期45-49,68,共6页Journal of Railway Engineering Society

摘　　要：研究目的:苍岭隧道最大埋深近800 m,隧道内围岩完整性好,强度高,在高围压条件下,隧道开挖后将产生岩爆现象,为保障隧道施工安全,准确预测掌子面前方未开挖段的岩爆发生状况,采用理论与实测相结合研究手段,两阶段预报方案对苍岭隧道的岩爆发生状况进行了预测。研究结论:通过两阶段岩爆预测可知,较之施工前岩爆预测情况,在实际条件下,轻微岩爆区长度将减少,中等岩爆区则基本相当,岩爆基本发生在边墙部位;卢森判据的结论更加适合本隧道岩爆的预测,前期研究中获取的隧道区内构造应力场较为准确,采用理论与现场实测的研究手段,结合两阶段岩爆预测模式,准确预测了掌子面前方一定范围内岩爆发生状况,为岩爆预测提供了切实可行的方法。Research purposes： The maximal burying depth of Cangling Tunnel is about 800 m and the integrality and strength of rock in the tunnel were perfect, so rock outburst would happen under high pressure of surrounding rock after the tunnel excavation. In order to ensure safety and exactly forecast the rock outburst of the rock in unexcavated zone in front of the working face, with the means of theoretic analysis and real test, the rock outburst of Cangling Tunnel was 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 past, the length of slight rock outburst area was reduced, but the length of medium rock outburst area was almost the same, and generally the rock outburst happens in the side wall of tunnel. Therefore, criterion of Russense is the most suitable to Cangling Tunnel, 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 outburst in two phases, the rock outburst in certain area in front of the working face is predicted correctly. This method is feasible for predicting the rock outburst.

关 键 词：苍岭隧道 岩爆预测 数值计算 判据 应力 

分 类 号：U456[建筑科学—桥梁与隧道工程]