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利用三轴渗透实验装置,进行了不同围压、不同瓦斯压力、不同温度水平下原煤试样的渗透率实验,得到了以上3种因素对渗透率的影响规律。实验结果表明:随围压的降低,渗透率逐渐增大;随着煤样中吸附瓦斯压力的增高,瓦斯气体流量则随之增大,而煤样的渗透性呈下降趋势;相比于围压和吸附瓦斯压力,温度对煤样渗透率的影响程度则大为降低。
The permeability of raw coal samples under different confining pressures, different gas pressures and different temperature levels was experimentally tested with a three-axis infiltration test device. The influence of the above three factors on the permeability was obtained. The experimental results show that with the decrease of confining pressure, the permeability increases gradually. With the increase of adsorption gas pressure in the coal sample, the gas flow increases, while the permeability of the coal sample decreases. Pressure and adsorption gas pressure, temperature on the permeability of coal samples is greatly reduced the extent of.