雅魯藏布江峽谷段某深埋隧道巖爆特征分析
[Abstract]:The Lhasa-Xigaze railway tunnels through the Yarlung Zangbo Valley. Under the influence of the regional geological environment, the tectonic stress concentration in the basin surrounding rock is concentrated in the section, and the rock burst problem is prominent in the construction process. The elastic strain energy of granite, gneiss and diorite surrounding rock in basin drawing is analyzed on the basis of in-situ stress data and physical and mechanical parameters of surrounding rock of tunnel, and the elastic strain energy of granite, gneiss and diorite surrounding rock mass in basin drawing is analyzed. The strength and deformation brittleness coefficient and elastic strain energy, etc., are used to analyze the rock burst tendency of surrounding rock mass. The maximum tangential stress of tunnel wall is calculated by using MIDAS finite element software. The rock burst strength of surrounding rock is evaluated by Russeness and Barton criteria. The granite has the tendency of mild to medium rockburst, the gneiss has the tendency of moderate to strong rockburst, and the diorite has the tendency of strong rockburst, and the diorite has the tendency of mild to moderate rockburst. The calculated results are consistent with the results of construction monitoring, and the research conclusions provide a reference for similar projects in this area.
【作者單位】: 西南石油大學(xué)地球科學(xué)與技術(shù)學(xué)院;
【基金】:中國(guó)鐵路總公司重大課題(2013G014-B)
【分類(lèi)號(hào)】:U456.3
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