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Minimum safety distance of adjacent explosive storage caves in class IV wall rocks

Year: 2024
Type: article
Abstract: To determine the minimum safety distance between explosive storage caves in Class IV wall rocks, a high-fidelity numerical computation model was developed, accounting for the impact of high pressure and high strain rate of rock. The model was subsequently validated by comparing the calculated minimum safety distances with those specified by relevant codes for Classes I, II, and III wall rocks. Using the validated model, the propagation patterns of shock waves in the explosive storage cave interior, cave lining, and surrounding rocks were analyzed to evaluate the effects of the wall rock characteristics on the damage and destruction of adjacent storage caves. A method for calculating the minimum safety distance of adjacent explosive storage caves based on the residual bearing capacity factor of the lining structure was developed. The calculation results indicated that when an explosion occurred inside the cave, the detonation products and shock waves could not be completely separated before reaching the lining structure. The blast load on the surface of the structure was significantly higher than that calculated from the ground explosion. The critical scaled distance of the explosion between caves was approximately similar to that for wall rocks of the same class. The residual lining bearing capacity, which characterizes the damage and destruction of the adjacent cave structure, was recognized as a crucial indicator of the inter-cave minimum safety distance. The analytical results indicate that the critical scaled distance for explosive storage caves in Class IV wall rocks is approximately 0.993 m/kg1/3, with the minimum safety distance between two caves being 49 m.
DOI: 10.1177/13694332241307725
Language: English
Open Access status: green
OpenAlex ID: W4405353573
FWCI: 0.17
Cites: 33
Cited by: 1
Related to: 10