煤层底板岩层的渗透特征

为探明不同岩类的岩组渗透性对煤层底板阻水性能产生的影响，通过对16煤层底板主要层位进行伺服渗透试验，分析各底板主要层位的应力一应变、渗透率一应变曲线，研究不同岩石的渗透变化规律，确定了临界抗渗强度和起始渗透率两个重要参数。结果表明：16煤底板泥质岩组、砂岩岩组、灰岩岩组的平均阻水能力换算系数分别为0．031、0．029和0．017。

Analysis on seepage features of rocks from coal floor

Aimed at addressing the different effect on resistance ability of coal floor water-inrush pro- duced by different seepage of various kinds of rocks, this paper studies the law governing the changes in seepage on different rock layer of the coal floor by analyzing the curve relation between stress and strain and that between penetration coefficient and strain, based on the test of seepage on rock under the 16th coal layer in Yangcun coalmine and offers the two crucial parameters, such as critical strength of anti- seepage and the initiative penetration coefficient. The results show that mudstone, sandstone, and lime- stone have the average conversion coefficient of resistance ability of water-inrush of 0.031 , 0. 029 , and O. 017 respectively.