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| COMPARISON OF DAMAGE EVOLUTION PROCESS OF HIGH ROCK SLOPE EXCAVATED BY DIFFERENT METHODS |
| HU Yingguo1，2，LU Wenbo1，2，CHEN Ming1，2，YAN Peng1，2，ZHOU Chuangbing1，2 |
(1. State Key Laboratory of Water Resources and Hydropower Engineering Science，Wuhan University，Wuhan，Hubei 430072，China；2. Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering，Ministry of Education，Wuhan University，
Wuhan，Hubei 430072，China) |
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Abstract It is important to study the damage evolution of high rock slope excavated by different methods，for the purpose of controlling possible damage of remaining rocks. Based on the secondary development of LS-DYNA，the overall process damage simulations of rock slope excavated by the smooth blasting and presplit blasting techniques are carried out in consideration of accumulated damage simulation technology. For the smooth blasting excavation method，the accumulated damage effect of product holes is the largest，followed by the smooth holes and the buffer holes. In the presplit blasting excavation，only the damage in remaining rock mass is induced，but it is bigger than that of smooth blasting. Comparing the damage distributions in remaining rock mass，there are two different kinds of damage zones in the remaining rock mass when using smooth blasting method. One is the zone induced by the smooth blasting itself but the degree of damage is high；and the other one is induced by accumulated effect of blasting in excavation zone，and the degree of damage is low. In the presplit blasting excavation，however，there is a bit higher degree of damage in remaining rock mass around the slope surface.
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Received: 11 January 2013
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2013, Vol. 32 
