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《Chinese Journal of Underground Space and Engineering》 2006-01
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The Numerical Simulating Propagation of Stress Waves in the Country Rock with Bolting

RONG Yao~1,XU Xi-bing~2,ZHAO Ming-jie~2,HUANG Hong-yuan~2(1.The Department of Geotechnical Engineering,Tongji University,Shanghai,200092,China;2.Chongqing Jiaotong University,Chongqing 400074,China)  
In order to analysze the effect of the country rock and the bolts in framework on the stress waves in excavating tunnel,by analyzing the blast loading pattern and the attenuation relation and effect of the disperse dynamite package,the multi-hollow blast loading,and the blast loading pattern of the control blast are obtained.Additionally the blast loading of one Tunnel is calculated.the numerical simulation of the propagation of the stress waves in the tunnel country rock is carried out with the blast loading as the load input.The results show that the finite element numerical simulation can quite well simulate the propagation of close quarter stress waves,it is suitable to use finite element simulation for simulating the propagation of close quarter stress waves;the index number function can fit the relation of velocity with distance;the velocity of analyzed dots around the country rock are quite different,so it is suggested to use the unsymmetrical support system.
【CateGory Index】: U451.2
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