寺河煤矿煤岩颗粒解吸—扩散特征实验研究

煤层气赋存于煤岩层的割理和基质孔隙中,以吸附状态为主,通过降压解吸释放.利用自主研制的煤岩解吸分析实验装置,研究寺河煤矿3#煤样粉碎后的4种不同粒径的干煤岩颗粒的解吸特征,随着解吸压力的降低,干煤岩颗粒在不同解吸压力下的解吸量不同,呈高—低—高的变化；解吸初始阶段,主要是解吸过程,解吸量主要与比表面积相关；解吸中后期阶段,主要是解吸—扩散过程,解吸量主要与扩散半径相关.

Experiment Study on Desorption-Diffusion Features of Coal and Rock Particles from Sihe Mine

Coalbed methane accumulate in the cleat and matrix porosity of the coal, mainly adsorbed state, production through buck desorption. Using independent designed experiment device, research the desorption characteristics of four different size of dry coal particles from crushed Qinshui basin temple coal mine 3# coal sample, with the reduction of desorption pressure, the desorption quantity of dry coal rock particles is different under different desorption pressure , appear high-low-high change; Desorption initial phase, desorption is the main process, desorption quantity is mainly related to specific surface area; Desorption mid-late stage , desorption-diffusion is the main process, desorption quantity is mainly related to diffusion radius of desorption .