Abstarct: Tunnels and underground spaces are built for various purposes. Including: transport and access tunnels, caves, underground spaces (metro stations, power plants, underground warehouses and mineral extraction workshops). The design of drilling and blasting pattern of these spaces is of interest, and since tunnel explosions are often baxsed on experimental methods, we are faced with undesirable phenomena, among which over-breaking and ground shaking are of great importance. For this purpose, in order to achieve the appropriate drilling pattern in the excavation of underground spaces, simultaneously with the excavation of the spaces in progress, the amount of vibration and overbreak and other information related to 17 blasting operations have been recorded. Also, using 17 seismic data from volcanic events, an empirical relationship for estimating the Peak particle velocity using the scaled distance parameter has been presented. In order to increase confidence, a comparison was made between the calculated relationship with the previous relationships, and in this comparison, the mentioned relationship had higher correlation coefficients than the previous relationships. Also, using the RMR, the Peak particle velocity of this mining workshop was determined between (mm/s) 76 and 117. Then, using the results of the overbreak predicting model, a model has been proposed for use in the studied mine, which was done to evaluate the proposed model of two explosions in the studied mine, which ultimately improved the performance of the project.