The construction of underground structures, due to the direct connection with the structure of the rock mass, always has many risks and problems that can endanger the life and financial safety of the project and make the structure face many challenges. Evaluating and predicting these risks is very beneficial in the implementation of the project in all stages of feasibility and design. The use of non-destructive geophysical methods can provide suitable subsurface information to designers with low costs and little time. The intended project in Zanjan province using geoelectrical method, two-dimensional electrical resistance tomography (ERT) was used to evaluate the characteristics of layering and determine the interlayers of Soltanieh formation and by combining geological observations and electrical resistance of the earth. , the amount of rock mass quality (RQD and RMR) has been calculated and according to them, the engineering geological risks of the project have been evaluated and predicted. The results obtained from the electrical resistance measurements have confirmed and refined the stratified rock (stratigraphic column) and geotechnical (rock mass quality) measurements well and can be a suitable solution for the subsurface studies of the project in the stage of recognition and planning. Be