| Juyuan Coal Mine which was in Pingxiang City, Jiangxi Province was coal and gas outburst mine. Since the shaft construction in1958,21times coal and gas outburst had been taken place, which seriously influences safety production of coal mine. This paper started from describing the related characteristics of geological structure of Juyuan Coal Mine, analyzed the involved factors which affected coal seam gas occurrence characteristics of the mine, predicted coal seam gas content, relative gas emission and coal seam outburst danger in order to discuss the mine’s characteristics of gas geology.It began with areal structure, described the background and related features of Juyuan Coal Mine’s geological structure according to the characteristics of tectonic level control, explained the gas occurrence characteristics of Pingle Sag having certain influence for gas occurrence characteristics of the mines in Pingxiang Mining Area from gas occurrence tectonic level control perspective. Secondly, Qingshan-Juyuan Broomlike Structure, fault, fold, klippe structure, lithologic character of the roof and floor, hydrogeological conditions’ influences on gas occurrence characteristics of the mine had been qualitativly analyzed; quantitativly discussed the effects of the coal seam fold deformation, contain arenaceous rate of the roof and floor, the depth, floor elevation and the thickness of coal seams, the degree of the coal deterioration on coal seam gas content. Thirdly, the relationship between the factors involved and coal seam gas content were studied by using single and multiple regression analysis and constructed its forecast model; forecasted the relative gas emission of the mine with the method of mine statistics. Finally, the related characteristics of Juyuan Coal Mine’s coal and gas outburst were summarized on the basis of counting and analyzing the previous coal and gas ourburst events, forecasted the coal seams’ outburst danger of the mine’s No.3level and divided the outburst danger zone by using single index, aggregative indicator and gas geology forecasting method according to the relevant regulations of Coal And Gas Outburst Prevention And Control Regulations (2009). |
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