Abstract
The paper discusses the problem of the underground mining safety control. The long-term air intake to coal accumulations is reviewed as one of the reasons of endogenous fires during mining. The methods of combating air leaks (inflows) in order to prevent endogenous fires are analyzed. The calculations showing the discrepancy between the design calculations for the mine ventilation, disregarding a number of mining-andgeological and mining-engineering factors, and the actual conditions of mining are given. It is proved that the conversion of operating mines to combined (pressure and exhaust) ventilation system in order to reduce the endogenous fire hazard of underground mining is unreasonable due to impossibility of providing an optimal distribution of aerodynamic pressure in mines. The conversion does not exclude the entry of air into potentially hazardous zones of endogenous fires. The essence of the combined application of positive and negative control methods for the distribution of air pressure is revealed. It consists of air doors installation in easily ventilated airways and installation of pressure equalization chambers equipped with auxiliary fans near the stoppings, working sections and in parallel airways.The effectiveness of the combined application of negative and positive control methods for the air pressure distribution in order to reduce endogenous fire hazard of mining operations is proved.
Highlights
The principal direction of the technical policy in the coal industry is the abandonment of the extensive development path
It is proved that the conversion of operating mines to combined ventilation system in order to reduce the endogenous fire hazard of underground mining is unreasonable due to impossibility of providing an optimal distribution of aerodynamic pressure in mines
The essence of the combined application of positive and negative control methods for the distribution of air pressure is revealed. It consists of air doors installation in ventilated airways and installation of pressure equalization chambers equipped with auxiliary fans near the stoppings, working sections and in parallel airways.The effectiveness of the combined application of negative and positive control methods for the air pressure distribution in order to reduce endogenous fire hazard of mining operations is proved
Summary
The principal direction of the technical policy in the coal industry is the abandonment of the extensive development path. The coal production should be increased mainly through the reconstruction of existing enterprises and their technical reequipment, concentration and intensification of the mining operations, which will lead to an accelerated dynamics of deep mining and, deterioration of the geological and mine-engineering factors. These circumstances contribute to the frequency and severity of accidents, and the problem of ensuring the proper safety of underground mining is of significant importance. Some researchers offered various methods of dust control and dust removal [10-15]
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