为研究胡襄煤田煤对 CH4吸附性及影响因素，对所采集煤样进行了等温吸附实验和压汞实验，研究了煤的吸附性及温度、压力、水分和灰分等因素对煤的吸附性影响。实验结果表明：胡襄煤田煤的吸附量开始随压力(0~1.5 MPa)的增加呈线性增大，之后(1.5~2.63 MPa)增大趋势减缓，增至2.63 MPa时，达到饱和吸附量的一半左右，在10 MPa左右时，吸附量趋于饱和；煤的吸附量较大，Langmuir体积VL为18.30~29.96 cm3/g；煤样以过渡孔最发育，其次为微孔和大孔，中孔相对最不发育，因此胡襄煤田煤的吸附量较大；水分对煤的吸附性影响较弱，而灰分的影响相对显著。%In order to study CH4adsorbability and the influencing factors of coal in Huxiang coalfiel, the mer-cury-injection experiment and isothermal adsorption experiment have been performed on the collected coal samples, the adsobability and the influence of temperature, pressure, moisture, ash content on the adsorbabilty have been studied. The results of the experiments showed thata. initiallythe adsorbing capacity increased linearly with the pressure(0~1.5 MPa), later (1.5~2.63 MPa) the increasing trend slowed down, when the pressure increased to 2.63 MPa, the adsorbing capacity was about half of saturation at 10 MPa tended to be saturated;b.the adsorbing capac-ity was larger, Langmuir volumeVLwas 18.30~29.96 cm3/g; transitional pores were the most developed in coal samples, followed by micropores and macropores, mesopores were the least, therefore the adsorbing capacity of coal in Huxiang coalfield was relatively big;c.the moisture had less influence on the adsobability, but the ash content had remarkable influence.
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