论文部分内容阅读
为了探讨断层带充填破碎岩石条件下的导水性,实地采集岩样,配制了全砂岩、砂泥岩含量2∶1、砂泥岩含量1∶2等3组实验样品,模拟实际的矿山压力和渗流水压等条件,测量渗流速度,计算渗透系数。结果表明破碎岩石的泥质成分越高,则相同条件下的渗透系数越小;在相同的矿山压力条件下,破碎岩石的渗透系数与渗流水压呈非线性反比例关系。认为断层带破碎岩石中含粘土矿物较多时,岩石易吸水膨胀、软化,增加对地下水渗流的阻碍作用;瞬间施加的渗流水压使样品被压密,导致孔隙被压缩,表现为渗透系数减小;实验成果可用于近似判断断层破碎带的实际渗流特性,可合理解释某些矿区断层发育、承压水头高但却不导水的现象。
In order to investigate the hydraulic conductivity under the condition of broken rock filled by fault zone, three samples of sandstone, sandstone and mudstone content of 1: 2 and sandstone and mudstone content of 1: 2 were prepared and collected from the field to simulate actual mine pressure and seepage water Pressure and other conditions, measuring the seepage velocity, calculate the permeability coefficient. The results show that the higher the shale content of the broken rock, the smaller the permeability coefficient under the same conditions. Under the same mine pressure, the permeability coefficient of the fractured rock is inversely proportional to the seepage pressure. It is considered that the rock is easy to absorb water to expand and soften when it contains more clayey minerals in the crushed rocks of the fault zone, which hinders the seepage flow of the groundwater. The seepage pressure exerted instantaneously causes the sample to be compacted, causing the pores to be compressed, showing the decrease of the permeability coefficient The results of the experiment can be used to approximate the actual seepage characteristics of the fault zone, which can reasonably explain the fault development in certain mining areas and the fact that the bearing head is high but does not conduct water.