摘要
煤体渗透性的主要影响因素为温度、静水压力以及孔隙压力。以这三个参数为因素,将煤体渗透率作为研究指标,基于正交试验法测试了不同条件下煤体的渗透率,对所测结果进行了回归分析,同时研究了不同孔隙压下孔隙率的分布情况。研究结果显示,静水压力对煤体渗透性的影响效果最为显著,其次为孔隙压力和温度,渗透率与这三个参数均显著相关;当孔隙压力大于2MPa时,孔隙压力对煤体渗透率的影响不明显;在煤体温度20°,静水压力11MPa以及孔隙压力3MPa的情况下,煤体的渗透率最大,达到了0. 3617mD。
The main factors affecting the permeability of coal are temperature,hydrostatic pressure and pore pressure,the three parameters are used in this paper to research the permeability of coal. Based on the orthogonal test,the permeability of coal under different conditions is tested. The regression analysis is carried out and the distribution of porosity under different pore pressures is studied. Research findings show,the effect of hydrostatic pressure on the permeability of coal is the most remarkable,followed by pore pressure and temperature,and permeability is significantly related to the three parameters;when the pore pressure is greater than 2 MPa,the pore pressure has no obvious influence on the permeability of the coal; when the coal temperature is 20℃,the hydrostatic pressure is 11 MPa and the pore pressure is 3 MPa,the permeability of the coal body is the largest,reaching 0. 3617 mD.
引文
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