Assessment of the Blasting Efficiency of a Long and Large-Diameter Uncharged Hole Boring Method in Tunnel Blasting Using 3D Numerical Analysis
نویسندگان
چکیده
Cut blasting is one of the most essential processes to reduce blast-induced vibration in tunnel blasting. The long and large-diameter uncharged hole boring (LLB) method an example cut methods, which utilizes holes drilled face. In this study, simulations were performed analyze its mechanism, LLB traditional burn-cut simulated compare their efficiency. A 3D numerical analysis using LS-DYNA code, a highly non-linear transient dynamic finite element explicit time integration, was used simulate process, Johnson–Holmquist constitutive material model, optimal for simulating brittle materials under conditions, rock behavior modified showed 3.75-fold increase advance per round compared method, due increased formation blast holes. This 30% less explosives, so failure range approximately 1.25 times than that but 4 larger similar original method. confirmed significantly more efficient terms efficiency (particularly round) as well reduced vibration,
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ژورنال
عنوان ژورنال: Sustainability
سال: 2022
ISSN: ['2071-1050']
DOI: https://doi.org/10.3390/su142013347