Abstarct: Dimension stone industry, is now one of the world's most widely used by financial industry. Growth in using dimension stone in construction industry also shows the importance of this sector. Investment in this sector of the industry has always been associated with high risks. However, investing in this sector of the industry is always accompanied by high risks. Identification and modeling of discontinuities is one of the most fundamental issues in the exploration and extraction of masonry mines. Discontinuity analysis is generally overlooked in construction stone mines and during mining, many problems of severe crushing of the stone blocks, resulting in reduced extraction efficiency, result in a desirable mining cut. In this dissertation, first, important features of discontinuities such as persistence, spacing, orientation, etc. have been extracted in the Kipul Quarry stone mine. then, using 3DEC simulation of the block model and using block modeling, different joint azimuth rotation was investigated in four classes. analyzing the results obtained from the modeling showed that in order to obtain maximum value, the current extraction direction must be 70 degrees west, which resulted in an average in situ block of 287.58cubic meters and the amount of coups sold in four classes 65826.27 cubic meters, which according to the current rate will generate about 115 billion and 98 million USD for this mine.