The laws of gas-solid coupling of coal-bed gas in deep high gassy coal seams
Résumé
In order to analyze the laws of gas-solid coupling of coal-bed gas in deep high gassy coal seam as well as prevent the gas compound dynamic catastrophes of deep gas-filled coal-rock, simulation of the laws about gas-solid coupling of coal-bed gas which is under the influence of gas pressure, mining depth is made by establishing theoretical gas-solid coupling model and using COMSOL Multiphysics software. Research results indicate that under the influence of factors such as high ground stress and gas pressure, the mutual coupling interaction between coal and gas is much more significant, which leads to the emergence of new characteristics of gas compound dynamic disasters. Reducing the ground stress concentration in front of the working face can not only minimize the possibility of rock burst accidents which are mainly caused by ground stress, but also weaken the role of ground stress as a barrier to gas, thereby decrease the number of outburst accidents whose dominant factor is gas; The results have a great theoretical and practical significance on the further optimization of accident prevention technique as well as safety protection of mine, disaster prevention system design and accident emergency plan.Références
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