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Journal of Mining Sciences

2017 year, number 3

Regularities of Two-Phase Gas Flow under Coal and Gas Outbursts in Mines

A. ZHOU1, K. WANG1, T. A. KIRYAEVA2, V. N. OPARIN2,3
1China University of Mining & Technology, Beijing, 100083 China
2Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
3Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630091 Russia
Keywords: характеристики распространения, пылевидный уголь и газ, двухфазный поток, внезапный выброс угля и газа, ударная волна, механико-математическое и физическое моделирование, сравнение результатов, подъемные выработки, flow characteristics, dust coal and gas, two-phase flow, coal and gas outburst, shock wave, mechano-mathematical and physical modeling, comparison, hoist openings

Abstract

The authors discuss the mechanism of interaction between dust coal and gas flow. The characteristics of two-phase flow are studied with regard to energy of expanding gas at the stage of outburst propagation using the developed method of numerical modeling. The mechano-mathematical method is verified in the wind tunnel tests of dust coal and gas flow. The comparison of the experimental and modeling data show satisfactory agreement in description of two-phase coal dust and gas flow under outburst with formation of shock waves attenuating in the line of the flow. The volume concentration of dust coal in two-phase flow essentially influences the process of the outburst shock wave attenuation.