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底板原位压渗试验能够获得丰富的反映底板岩层阻渗性的信息,本文介绍了杨村矿下组煤底板3个不同岩性结构测试段的原位压渗试验成果,基于压渗过程曲线分析讨论了测试岩层起始导渗的水压力和渗透系数、压裂导通状态的水压力和渗透系数、压渗过程的压渗流量和渗流阻力的变化与导渗状态的关联性,得到如下认识:构造扰动部位底板阻渗能力薄弱,具有低阻强渗特点;完整性较好的原状结构底板岩层阻渗性较强,不但起始导渗的水压条件较高,而且导渗状态表现为高阻弱渗特点;底板岩层的阻渗性与岩性的关联性不明显,主要受制于岩层的原始结构条件和裂隙性状;杨村煤矿下组煤底板厚层砂岩是很好的隔水层,具有良好的隔水效果.
The in-situ infiltration test of the bottom plate can obtain abundant information which can reflect the permeability of the bottom strata. In this paper, the in-situ infiltration test results of three different lithology structure test sections of the lower coal seam floor in Yangcun are introduced. Based on the curve of the infiltration process, The relationship between water pressure and permeability coefficient at the initial stage of test rock formation, water pressure and permeability coefficient at fracture state, pressure seepage flow and seepage resistance during infiltration process is analyzed and discussed as follows Recognition: structural disturbance of the bottom plate impermeability is weak, with low resistivity and strong seepage characteristics; better integrity of the original structure of the strong permeability of rock strata, not only the initial water seepage pressure higher, and the performance of the state of the guide Which is characterized by high resistivity and weak permeability; the relationship between permeability and lithology of the basement rock formation is not obvious, which is mainly controlled by the original structural conditions and fracture characteristics of the rock strata; Layer, with good water barrier effect.