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Crustal stress measurement and rockburst possibility analysis at a highway tunnel in east China
Author(s): 
Pages: 57-61
Year: Issue:  1
Journal: HYDROGEOLOGY & ENGINEERING GEOLOGY

Keyword:  水压致裂法地应力隧洞岩爆;
Abstract: 通过华东某公路隧洞3个深钻孔的水压致裂法地应力测量结果,分析并推导得到了隧洞轴线水平面上的应力和隧洞轴线横截面内最大切向应力的估算公式,并用于隧洞形状选择及隧洞开挖时岩爆可能性判断.认为测区应力以水平作用为主,在测试深度域内最大水平主应力的数值在4.69~14.07MPa,优势方向约N61°W,用应力估算公式和岩爆判据得出岩爆发生的临界埋深厚度约304m.
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