Abstract：The traditional and modern measurement methods of fractures are used to measure the fractures of rock mass in the grouting galleries of the left bank of a dam site area. Based on the measured results of fractures，the calculation method of permeability tensor is proposed and the relevant software using Visual Basic Language is developed. The merits of the software are easy to use and free of the trivial calculation due to visualization design. The software is used to calculate the permeability of fractures in the grouting galleries，and the results are validated. It is shown that the software can be used as a supplement for back analysis of water pressure experiment and can be used to provide scientific basis for the zoning of permeability of fractured rock mass and the optimization of curtain seepage prevention.
