| For the special geological conditions that coal seams are invaded by igneous rock at 103 working face of coal seam 10 at WoLonghu coal mine,this paper researched the gas emission law of the coal seam.Sampling coal samples from igneous rock invasion area and the normal geological belt distinction then carrying on contrast experiment, this research studied the microstructure of coal body and got the features of both rock invasion area and the normal geological belt distinction.Gas parameters such as gas pressure P,sturdiness coeffcient f,initial velocity of gas emission⊿p,adsorption constant a and b and gas content of coal seams are determined in the research. Researched on pumping and discharging amount and gas emission amount after pumping and discharging,different gas emission rules between igneous rock invasion area and the normal geological belt distinction are found.This paper also analyzed gas emission features near the faults.At last this forcasted the gas emission rules near the igneous rock using grey forecasting model.The relationship of distance from igneous rock of coal seams and the amount of gas emission was analyzed in this paper. |
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