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一、引言 地壳表层的岩体是由岩块和交切岩块的裂隙网络组成的地质体。根据岩块的渗透性和裂隙渗透性之比值大小,可以把岩体分成两类,一类是岩块的渗透性极低,往往视为不可渗的,其渗透性主要取决于岩体裂隙的渗透性,这种岩体可称为单孔隙性岩体,诸如变质岩和花岗岩岩体等;另一类是岩块、裂隙都是可渗的,这类岩体称为双孔隙性岩
I. INTRODUCTION The rock mass on the crust surface is a geological body composed of fractured networks of rock masses and dumped rock masses. According to the ratio of rock permeability and fissure permeability, the rock mass can be divided into two types. One is that the permeability of the rock mass is very low, often regarded as impermeable, and its permeability mainly depends on the rock mass fissure Permeability, this type of rock mass can be referred to as a single-porosity rock mass, such as metamorphic rock and granite rock mass; the other is a rock block, the cracks are all permeable, such rock mass is called double-porosity rock