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.

中文翻译：

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改变安全壁垒的可渗透性，缓解矿山爆炸产生的冲击波效应

摘要

在平衡和非粘性公式中，对具有不可渗透的安全屏障的巷道中的冲击波传播进行了数值模拟。研究了在0到0.8范围内变化的孔隙率下的倾斜和拱形屏障。倾斜的和拱形的障碍物由于形成倾斜的反射波或在形成拱形障碍物的情况下是径向的反射波而减小了由冲击波施加在障碍物结构上的负荷。屏障的孔隙率的增加可以进一步削弱冲击波的作用，但是具有高渗透性的屏障使防御性屏幕的效率低下，这可以通过在通过屏障后冲击波前的较高压差来确认。