A new method for calculating energy release rate in tunnel excavation subjected to high in situ stress

详细信息    查看全文

• 作者：Xiao Qinghua^a ; ^{xqhbp@home.swjtu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Liu Jianguo^a ; ^{15882103924@139.com" class="auth_mail" title="E-mail the corresponding author} ; Lei Shenxiang^a ; ^b ; ^{leishx13g@163.com" class="auth_mail" title="E-mail the corresponding author} ; Gao Bo^a ; ^{prgaobo@vip.sina.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Tunnel engineering ; Fractional energy release rate ; New calculating method ; High in situ stress ; Rockburst
• 刊名：Perspectives in Science
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：7
• 期：Complete
• 页码：292-298
• 全文大小：2792 K

文摘

Based on energy theory, energy release rate (EER) and local energy release rate (LEER), a new index called FERR (Fractional Energy Release Rate) is proposed, and this method can not only evaluate the risk of rock burst, but also can point out the location of high risk and the scale of rockburst. The FERR index is applied to the TBM assembling tunnel in Jinping Hydro Power Station II to evaluate the scale and intensity of rockburst, as well as the location where rockburst occurs. With FDM method adopted, the energy release rate of 3 excavation plans are calculated and the scale and risk of rockburst is evaluated, and the location of high risk of rockburst is also mapped. With FERR used in the evaluation, the rockburst is nicely controlled which ensured the safety and construction schedule of the project.