采场底板岩石渗透性试验研究

采场底板岩石的渗透性是评价煤层底板隔水层隔水能力以及能否进行安全带压开采的重要因素。通过伺服渗透试验所获得的渗透率—应变关系及应力—应变关系,分析了全应力—应变过程中岩石渗透性随变形的变化特点及不同裂隙充填物质的岩石渗透率—应变关系的主要差异和渗透率—应力之间的关联性。最后提出了采场底板岩层可以视为相对隔水层,对工程评价有一定的指导意义。

Test Study on Penetrability of Floor Rock in Stope

The penetrability of floor rock in stope is an important factor for evaluating water-proof capacity of water-resisting layer in floor rock of coal seam and whether the coal seam can be safely mined under pressure. Through the permeability test under servo system "complete stress -strain path", the relationship among the permeability, strain and stress of rock is obtained and the variation character of the rock permeability with deformation in the complete stress -strain process, the main difference of permeability-strain relation ofrock filled with different materials and the correlation between permeability-stress are analyzed. Finally, the conclusion is put forward that the coal seam floor may be regarded as a relative waterproof layer during mining, so this can be a guidance for engineering evaluation.