【摘要】 原煤吸附甲烷其吸附量不高,而且孔隙不均匀,但是型煤不但吸附量大大增加,而且孔隙均匀,孔隙度也可以随意控制（一定范围内）。利用三轴渗透仪等装置对型煤的吸附解吸进行了实验,通过改变轴压、围压、孔隙压观测其对甲烷吸附量的影响。然后利用RecCore系列全直径核磁共振仪进行回波串及其T₂谱的测量研究。更多还原

【Abstract】 The amount of CH4 adsorbed by nature coal is very small,and the pore is ununiform,but the moulding coal not only increase the volume of CH4 adsorbed but also make the proe uniform and control the porosity（within the limit）.Do the experiment about adsorption and desorption with moulding coal and change the condition,find how it influence the adsorption.Then do the reseach about CPMG and T₂ on the moulding coal by NMR method.更多还原