多孔岩石化学注浆过程中视电阻率变化试验

Experiment on apparent resistivity changes in porous rock chemical grouting process

采用大型有机玻璃模型对弱胶结多孔岩石注水饱和及化学注浆过程中视电阻率变化进行室内模拟试验。研究结果表明:视电阻率变化的基本规律是在注水饱和过程中先是缓慢下降,之后迅速大幅度下降并趋于稳定;化学注浆过程中模型内部不同部位下降幅度不同,但总体下降幅度较小。根据变化幅度,可将化学注浆过程中视电阻率变化分为3种类型以分别反映出该处浆液充填程度,即浆液充填良好区视电阻率显著降低,浆液扩散影响区视电阻率略有降低,而非注浆区视电阻率则基本稳定。视电阻率对化学浆液的运动具有很好的"可视化"再现和指示浆液渗流位置功能,为深入研究化学浆液扩散规律和注浆效果检验提供一种新方法。

In order to obtain apparent resistivity variation during porous rock water injection saturated and chemical grouting process, a large organic glass model simulation experiment was carried out. The results indicate that the apparent resistivity slowly declines in the beginning, significant declines rapidly and stabilizes afterwards in water saturation process. There is different reduced amplitudes in different locations in the model. However, the overall reduces to a lesser extent in chemical grouting process. According to the amplitude variation, apparent resistivity changes can be divided into three types that is apparent resistivity significantly reduced in grout filling good area, slightly declined in grout diffusion effect region and almost no change in no-grouting zone. The apparent resistivity has very good visualization reproduction function to chemical ~rout movement and directs the slurry seepage position.