Nature and distribution of structural components of rock mass affects rock mass behavior against the static and dynamic loadings. Due to a direct effect of dynamics on stability of man-made ??structures, dynamic analysis and evaluation of propagation effects on mining and civil projects is important specially. Some applications of wave propagation are: movement of urban trains and their effect on adjacent structures, the explosion in military industry and evaluate the intensity and attenuation of blast waves, effect of earthquake on production of oil and gas reservoirs, evaluation of seismic waves in rock masses and its effects on various properties of the rock mass. Transmission of seismic waves from a particular region may influence the hydraulic properties of the rock mass in that region. Permeability is one of the most important hydraulic properties of rock mass. The importance of this parameter can be found in these categories: oil and gas reservoirs, stability of rock slopes, dam foundation, underground spaces, nuclear waste and in general, how each type of transmission fluid within the rock mass. Modeled in this study is performed discontinuously using UDEC. At first, the 8 models with dimensions of 20 × 20 meters and with 8 different types of discrete fracture network (DFN) are made and all analyzes were performed on these models. All modeling of fluid flow in this thesis can be placed in three different groups. These three groups are: Group 1) In this group, after the construction of the model geometry, models without the mechanical cycle is entered to fluid flow simulation step. It should be noted that the joints aperture is considered equal to 65×10 -6 m in this group. Group 2) In this group, after the construction of the models geometry, put them under hydrostatic boundary conditions and in the next step models are entered to fluid flow simulation. Group 3) In this group, after exposure models under dynamic loading and experiencing the earthquake, models are entered to fluid flow simulation. In dynamic modeling step, models were subjected to dynamic stress of Parkfield earthquake with assuming Barton-Bandis constitutive model for joints. At this step, all considerations of dynamic analysis such as input loading, boundary and initial conditions, attenuation and wave transmission through the rock mass has been carefully examined. Moreover, at this step, the natural frequency was also calculated. In fluid flow modeling step models were subjected to hydraulic boundary conditions and fluid flow is passed through them. It should be noted that at this step the fluid is assumed Newtonian and incompressible. The results indicate that the transmission of seismic waves can cause two problems. The first problem is that the transmission of seismic waves increases the joint aperture and the second problem can be seen that earthquake waves cause successive displacement of blocks and a slight change in its position relative to the previous mode. Both problems increase permeability in the region that has been studied. It should be noted that seismic waves have affected the hydraulic anisotropy and have increased the anisotropy of the hydraulic properties of the studied area. These problems indicate that seismic waves in the deep Earth can also be effective in spite of the expected, and according to the results of this study seismic waves have increased the permeability of the rock mass. Increased permeability entails certain consequences that the most important is the increased inflow of water into tunnels and underground spaces. This problem directly affects the stability of underground spaces.