The angles optimization algorithm of slopes laying on iron ore open cast mine considering anisotropy of strength properties and fracture density of the solid rock (on the example of Stoylensky iron ore open cast mine at Kursk Magnetic Anomaly)

The development of Stoylensky iron ore opencast mine during the 50 years is accompanied by the extraction of huge masses of rocks and ores, that radically changes the stress-strain state of the array and the formation of a technogenic aquifer. The long-term quarry exploitation has a result of progressive development of engineering-geological processes: scree, landslides, creeps, suffusion. The development of processes initiated by technological works has a progressive space-time character. The solution of problem of the open pit slope stability which provides accident-free conducting of mining operations at long-term development of the field, is based on modern methodology of calculations. The angles optimization algorithm of slopes staking on Stoylensky iron ore open cast mine and the calculation of the coefficient of stability by different methods with the consideration of the anisotropy of strength properties and fracture density of the solid rock, have been suggested.