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LINEAR DYNAMIC ANALYSIS ON ROCK-MEDIA OF OLD TUNNEL AFFECTED BY BLASTING VIBRATION OF NEW TUNNEL WITH SMALL LINE-CLEARANCE

Yang Shengquan(The Mining and Metallurgy Institute of Changsha,Changsha 410012)  
In this paper,linear dynamic analysis on the circle of old tunnel and rockmedia is proceeded on the condition that the lineclearance of two tunnels is small,according to the result of the blasting vibration test and measure of old tunnel,combined with the calculation of the stress and displacement etc.of rockmedia affected by digging of new tunnel.At the same time,it is proposed some problems which should be paied attention to in similar engineering.
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