| 西周岭隧道地应力测量及岩爆预测分析 |
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| 引用本文： | 刘军强.西周岭隧道地应力测量及岩爆预测分析[J].工程地质学报(英文版),2011,19(3):428-432. |
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| 作者姓名： | 刘军强 |
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| 作者单位： | 浙江省地球物理地球化学勘查院 杭州 310005 |
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| 摘 要： | 为指导施工,提高施工的安全性和经济性,对西周岭隧道进行了钻孔水压致裂法地应力测量.测试结果表明:西周岭隧道深埋段地应力场以水平应力为主,在测试深度内最大水平主应力值为10.57～19.39MPa,具中等偏高应力水平;最大水平主应力方向为近N33°W,与隧道走向的夹角较小,即地应力对隧道围岩稳定性较为有利.基于地应力实测...
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| 关 键 词： | 西周岭隧道 水压致裂法 地应力测量 岩爆 |
| 收稿时间： | 2010-10-25 |
IN-SITU STRESS MEASUREMENT AND ROCKBURST FORECAST ANLYSIS IN XIZHOULING TUNNEL |
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| LIU Junqiang.IN-SITU STRESS MEASUREMENT AND ROCKBURST FORECAST ANLYSIS IN XIZHOULING TUNNEL[J].Journal of Engineering Geology,2011,19(3):428-432. |
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| Authors: | LIU Junqiang |
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| Institution: | Zhejiang Geophysical and Geochemical Prospecting Academy,Hangzhou 310005 |
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| Abstract: | In order to guide construction and improve the safety and economy of construction,hydro-fracturing stress measurements have been conducted for Xizhouling tunnel of Zhejiang Province.It is found that the most important stress direction is the horizontal direction in the surveyed area.Within the measured depths,the maximum horizontal stress is of 10.57~19.39MPa.This stress level can be classified as middle to high level in this deep-seated tunnel.The dominant direction of the maximum horizontal stress is about N33W.The angle between the direction of the maximum horizontal stress and the direction of the tunnel axis is relatively small for this tunnel,and favorable to the stability of the tunnel and the surrounding rock mass.Based on the in-situ stress results and four distinguished methods( i.e. , Hoek method,Turchaninov method,Russenes method and engineering rock quality classification standard)rockbursts are forecasted during tunnel construction in the deep-seated tunnel conditions.The critical buried depth of rockburst is estimated.The results show that there are high possibilities of occurring weak and moderate rockbursts in this tunnel.The critical buried depth of rockburst is about 397m.In order to avoid the disadvantage conditions,reasonable excavation method and safety precautions should be adopted during the tunnel construction. |
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| Keywords: | Xizhouling tunnel Hydro-fracturing method In-situ stress measurement Rockburst forecast |
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