煤层注水渗流特征实验研究

采用实验方法,研究水在煤体中的渗流特征,包括有效覆压、注水压力、孔隙压力等因素对水渗透能力的影响。研究表明,煤层试样的渗透率受覆压影响很大;渗流开始时随着入口水压的增大,渗透率逐渐变大;回压逐渐升高时,渗透率呈现出先减小后增大的变化趋势。

Experimental Study on Mechanism of Injection Water Flow in Coal Seam

Characteristics of water seepage in coal bed core are studied by experiments,including the impact of factors such as effective press,injection water pressure and pore pressure on water permeability,The research shows that the permeability of coal bed core is greatly affected by the effective press;at the beginning of permeating,the permeability increases continuously with the injection water pressure increasing while the back-pressure increases gradually,the permeability shows the trend is decreasing at first and then increasing.