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Journal of Mining Sciences

2020 year, number 5

Mitigation of Shock Wave Effect Produced by an Explosion in Mines by Changing Safety Barrier Penetrability

V. M. Fomin, B. V. Postnikov, V. A. Kolotilov
Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
Keywords: Shock wave, roadway, explosion, penetrable barrier

Abstract

Shock wave travel in a roadway with impermeable safety barriers is modeled numerically in the equilibrium and non-viscous formulation. Inclined and arched barriers are studied at the varied porosity in a range from 0 to 0.8. The inclined and arched barriers decrease the load exerted on the barrier structure by the shock wave owing to formation of a reflected wave which is oblique, or radial in case of the arched barrier. An increase in porosity of the barrier can additionally weaken the shock wave effect but barriers with high penetrability make the defensive screen inefficient, which is confirmed by the higher differential pressure at the shock wave front after passing the barrier.