Journal of Mining & Safety Engineering ›› 2012, Vol. 29 ›› Issue (2): 245-249.
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Abstract: Distribution of cracks and its mechanism of the tunnel reinforced by bolts were studied by numerical analysis.It is proved that numerical results are reliable by comparing the law of stress wave propagation and distribution of cracks.With stress wave propagation,cracks produced by stress waves were formed in free surface of top and tunnel,and some cracks were distributed in two sides of arch foots and between bolts.Comparing cracks of the tunnel with no support and the tunnel reinforced by bolts,the cracks of the tunnel with no support are wider and thicker than anchored tunnel.As a result, it shows that the anchored effect is very good.
Key words:  , rock mechanics;tunnel projects;tunnels reinforced by bolts;dynamic cracks;numerical analysis
WANG Guang-Yong, REN Lian-Wei, GUO Jia-Qi. The Distribution of Cracks and Its Mechanism of Tunnel Reinforced by Bolts Under Top Explosion[J]. Journal of Mining & Safety Engineering, 2012, 29(2): 245-249.
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http://ckxb.cumt.edu.cn/EN/Y2012/V29/I2/245