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《Mining Safety & Environmental Protection》 2005-02
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Criterion for Rock Burst in Tunnel and Its Forecast

Rock burst is a common geological disaster of dynamic destabilization in excavation of the underground engineering chamber in high stress area. In this paper, the authors, by analyzing the stress of surrounding rock of a circular tunnel and the characteristics of crack extension within the surrounding rock after excavation and using the destruction criterion of Griffith strength theory, obtained the criterion expressed by the tensile strength of rock for rock burst occurred in the tunnel excavation, which can be used for better prediction of rock burst. The authors put forward the prediction method for rock burst by theoretical analysis and site measurement according to the characteristics of rock burst occurred in the tunnel. This research result can be used for similar projects for reference.
【CateGory Index】: U455
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