充填泥沙裂隙岩石渗流特性的实验研究

Sediment particles in natural rock, which has a large number of connected cracks and faults, have some impact on transport of groundwater and the changeable permeability by creating microcracks and damage zones around faults. In this paper, an experiment about seepage through rock electro-hydraulic servo test system of MTS815.02, together with electron micrograph of sandstone pore, is designed and used to investigate the relationship between changeable permeability and the filling silt in creating cracks. Results show that, permeability in cracked rock decrease distinctly under the silt-induced effect. Permeability, along with the sediment particles in macrofissures in the cracked rock to achieve re-balancing of transport, gradually increases over time and eventually stabilizes.