Substantiation of Design Parameters of Coal Dust Explosion Containment System

Abstract

The aim of the paper is to identify the qualitative and quantitative parameters of seismic waves and accelerations on the mine working contour after an explosion of the gas-and-dust mixture. Information about the formation of seismic waves in the rock mass accommodating the mine working was received using modelling in order to improve the means of containment of explosion of further developed dust-air mixture. The parameters of seismic waves, such as propagation velocity and acceleration, amplitude, and frequency of oscillations of mine working walls, were established for the conditions of the experimental structure, which allows to scientifically substantiating the design parameters of the systems protecting the miners against explosion. The energy of the explosion propagates in the rock mass in the form of a series of peak-like pulses and oscillations with smaller amplitude. Modulus of acceleration is an informational indicator, which suits the most for registration by seismic sensors responding, specifically, to the most powerful peak pulses formed by seismic waves. By revealing the qualitative and quantitative indicators of seismic wave propagation on the mine working contour and in the rock mass, the parameters of seismic sensors of the systems protecting the miners against explosion can be substantiated.

Mechanism of Coal Aerosol Explosion Development in an Experimental Mine Working

“…The wave propagation of the explosion also contributes to the uneven transition of dust deposits to the state of the curtain and the unstable content of fuel in the aerosol. The obtained experimental data on the velocity of propagation of the explosion front in the experimental mine working are the basis for substantiating the speed of operation of automatic means of suppressing explosions, for example, to select the distance between the sensor and the actuator (Kostenko et al, 2021). The availability of technological equipment, fastening equipment and rail vehicles help to suppress the intensity of an explosion.…”