【摘要】 以潞安矿区3号煤层煤为样本,在实验的基础上,研究了瓦斯排放过程中煤体孔隙压力、有效应力的变化规律,揭示了煤体孔隙压力、有效应力以及等效孔隙压系数随时间的变化规律。实验结果表明,煤体的有效应力与瓦斯排放时间服从对数规律,即iσ=ailn(t)+iσ0;煤体的等效孔隙压系数与瓦斯排放时间服从对数规律,即α=0α-cln(t),并且在此过程中,煤体的等效孔隙压系数值是瓦斯排放时间的函数。实验结果对研究煤层中瓦斯的流动规律以及煤层气的开发具有重要的参考价值。更多还原

【Abstract】 Based on the inside experiment about the methane drainage, the mutative law of coal of pore pressure(p),effective stress(αi) and effective stress coefficient(α) is researched during the methane drainage with the coal sample of 3# coal seam China Lu’an Coal Field.The result indicates that,during the methane drainage,effective stress(σi) of coal-mass follows logarithm incremental law:σi=ailn(t)+σi0;effective stress coefficient(α) follows logarithm attenuation law:α=α0-cln(t).The experiment result will have important reference value on the research of flowing law of methane in coal seams and on the exploitation of methane.更多还原