Research Of Dayangquan Coal Mine Adsorption Characteristics And Model Applicablity

With the development of society, the coal being occupies an importantposition in China’s economic development. It impetus to China’s economicdevelopment, China’s economic growth has made a significant contribution.Adsorption characteristics of coal is mainly affected by temperature, pressure,particle size and other factors. Adsorption characteristics of coal has sometheoretical significance for measuring the basic parameters of gas, for coal seamgas reserves estimate and gas outburst prediction also has some significance.With the help of the applicability of adsorption constants meter DaYangquanCoal Mine No.3,6,12,15seam methane adsorption characteristics and Langmuirmodels, BET model and DR models on this four seam model adsorptionexperiments on these issues to analyze. We made the following conclusions:The first, coal mine of DaYangquan3#,6#,12#,15#coal seam samplesfor the presence of methane adsorption following characteristics: With thedeepening of coal rank, the particle size decreases, the amount of coal tomethane adsorption gradually increase Large, as the temperature rises, theamount of adsorption decreases; Adsorption of coal and adsorption pressure-time was approximately parabolic positive correlation between the amount of change with regularity adsorption time is not strong, adsorption between thecurves The adsorption rate of time difference is obvious.The second, Langmuir models, BET model and DR model in a large coalmine in DaYangquan3#,6#,12#,15#coal seam methane adsorption on theapplicability of the data processing has the following rules: For a single seam,the elevated temperature or by Large coal particle size on the magnitude of thecorrelation coefficient variation of the same model are small, there is asignificant difference in the correlation value between the different models,different models of the residuals increases as the particle size of the decrease,and the temperature of different the difference between the residual influence ofthe model is not obvious, only DR model decreases with its increase; fordifferent coal seams, the residuals between the different models with the changeof seam there are differences, indicating different adsorption model have somedifferences when describing experimental data in this mine different coal seams,by comparison residuals BET model changes with smaller amplitude seam;Langmuir models, BET model and the DR model, although there are somedifferences in the accuracy of the description, but the experiment Overall fitfactor data were greater than0.9, indicating that the three models can meet theaccuracy requirements, but on the whole fitting accuracy is higher BET models,it has strong applicability in the mine.