In this research, site investigations and tests were performed in Khneifees phosphate mine. Samples of the studied rocks were brought to the laboratory and tests were performed. The types of these rocks are clayey limestone, organic limestone, white and gray trepolite, opoka, chert and phosphate.The tests were performed according to "American Standards for Testing of Materials" (ASTM), and the recommendations of "International Society for Rock Mechanics" (ISRM).