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Research on the Attenuation of Blast Wave by Groups of Filled Cracks in Surrounding Rock of Cavern
Xin Liu,Hong-fa Xu,Peng-xian Fan,Jian-nan Zhou,Han-sheng Geng,Jia-quan Mo,Tao-lin Zhang 대한토목학회 2023 KSCE Journal of Civil Engineering Vol.27 No.7
This study introduces an approach for constructing groups of filled cracks in the surroundingrock to achieve anti-blasting and wave elimination protection for underground caverns. Toverify the attenuation effect of the explosion wave by the filled cracks, two models, a no-crackmodel, and a filled-crack model, were constructed using a certain proportion of analoguematerials based on the similarity theory. With the implementation of small equivalentexplosion conditions, the peak pressure of the surrounding rock of the cavern and thevibration acceleration of the cavern wall under different explosion conditions were measured. To accurately judge the attenuation efficiency of the filled cracks, the peak pressure attenuationpercentages between different measuring points were calculated. Furthermore, thecorresponding numerical simulation analysis process was performed according to the testconditions. The results show that not only the peak pressure attenuation percentages, but alsothe value of vibration acceleration, were significantly reduced due to the existence of filledcracks in the model. This indicates that filled cracks in the surrounding rock of the cavern caneffectively attenuate the peak pressure and vibration acceleration caused by the explosionwave, thereby achieving the protection engineering goal of anti-explosion and wave elimination.
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