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Case Study for the Improvement of Tunnel Advance Rate & the Time Reduction of Working Process in Long Hole Blasting About Tunnel Excavation  

Kim, Hee-Do ((주)고려노벨화약 서울지사 기술부 총괄팀)
Lee, Jun-Won ((주)고려노벨화약 서울지사 기술부)
Lee, Ha-Young ((주)고려노벨화약 본사 기술부)
Publication Information
Explosives and Blasting / v.31, no.2, 2013 , pp. 32-39 More about this Journal
Abstract
Generally, The way of long hole blasting is carried out in coal-face, basic excavation for dam, mine etc. Recently, this long hole blasting has been implemented in civil engineering for efficiency & economic feasibility. National express no.600 of Pusan outer high-express ${\bigcirc}$ construction site with four lanes of the length of 8km was also a site applied by long hole blasting. But After blasting, tunnel advance rate is less than 75%. As a result of that, Follow-up working time is influenced. Thereby, The total of working process is significantly so increased that planned excavation cannot be implemented many times. For not only improve excavation rate but reduce working process time in job site, we introduce blasting case which apply the ${\phi}36mm$ explosive suited for high desity of charging among long hole blasting in order to overcome mentioned problem.
Keywords
Construction efficiency; Long hole blasting; Tunnel advance rate; Density of charging; Time for working process;
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  • Reference
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