Author:
Cherdantsev S V,Shlapakov P A,Lebedev K S,Yu Erastov A,Khaymin S A,Shlapakov E A,Kolykhalov V V
Abstract
Abstract
With the increase in the intensity of underground mining, due to the use of modern mining equipment and the use of new technological systems of cleaning works, cases of mani-festations of negative factors are becoming more frequent. The main ones are gas-dynamic and thermophysical processes in the atmosphere of mine workings, which significantly reduce productivity and safety in the mining industry. The article deals with the gas-dynamic and thermophysical parameters of shock-wave processes occurring in the atmosphere of mine workings. On the basis of the fundamental laws of conservation of mass, momentum and energy, formulas characterizing changes in pressure, density and temperature in the dust-gas-air mixtures behind the shock front are obtained. When obtaining formulas, it is taken into account that the heat capacity of dust and gas mixtures on different sides of the shock front is different. Built dependency graphs of pressure, density and temperature of mixtures from Mach number and the relationship of indicators of specific heats, Poisson. The analysis on the basis of which a number of regularities in the dust-gas-air flows of mine workings was found.