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。
Based on the inside experiment about the methane drainage, the mutative law of coal of pore pressure (p) , effective stress (a) and effective stress coefficient (a) 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 (a) follows logarithm attenuation law: α = α0-cln(t) . The experiment result will have important reference value on the re- search of flowing law of methane in coal seams and on the exploitation of methane.
出处
《太原理工大学学报》
CAS
北大核心
2008年第4期397-399,403,共4页
Journal of Taiyuan University of Technology
基金
国家自然科学基金项目资助(50404017)
山西省自然科学基金项目资助(20051026)
关键词
煤体瓦斯
瓦斯排放
有效应力
methane of coal-mass
methane drainage
effective stress