| This paper uses the combining method as simulated test and theoretical analysis, simulated test for the gas desorption process about Cheng zhuang colliery of No.3 coal seam in Jin cheng in the case of different adsorption balance pressure and different desorption temperature conditions. Study on the gas desorption quantity and desorption speed affected on adsorption balance pressure and desorption temperature conditions, and got the influence size and corresponding relation on particles coal's gas desorption quantity and desorption speed in the case of the same adsorption balance pressure and different desorption temperature conditions, also got the corresponding relation on particles coal's gas desorption quantity and desorption speed in the case of the same desorption temperature and different adsorption balance pressure conditions. The reasonable calculation method for gas loss was got when the desorption temperature is different eventually.We simulate systematically the gas recorery process for coal sample which's failure modes and size are the same,in the case of different adsorption balance pressure(20℃,30℃,40℃,50℃and 60℃) and different desorption temperature conditions(0.5MPa,0.74MPa,1.5MPa,2.5MPa and 3MPa),using the origin75 software analyse the testing data with the method of regression analysis,simulation results show that particles coal's gas desorption quantity and volume increaseΔQ will increase as desorption temperature increases at the same desorption condition, the gas desorption speed also increases at the every time point.Temperature affected coefficient is obtained through analysissing previous desorption experience formulas,with the method of regression analysis and compared calculation,using the method of comparative analysis to the particles coal's gas desorption quantity calculated and the experimental results. R.M.Barrer type's error is the minimum error compared to other experience formula, is only 11.76%~19.9% between in the initial desorption within 5 to 15min,draw a conclusion that R.M.Barrer type is the best desorption formula for describing particle coal's desorption rule at the initial desorption stage in different desorption temperature conditions.Based on the results of the study about temperature affect of particle coal's gas desorption laws, analyzes the influence of temperature on gas loss, and set up reasonable formula on calculation of gas loss in the different desorption temperature. Through laboratory and on-site validation, this influence coefficient can description of gas desorption laws in the form of different temperature conditions, and the result's accuracy of measuring gas content will being further improved.
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