Side deep pits are complex engineering structures, which depend on the state of mine safety. As bating and opening new horizons in the development of mineral deposits open as a result of long-term at the edge array of pits are changing the natural stress and accumulated fatigue, which leads to deformation of the sides, ending in some cases, catastrophic collapses and landslides.Prevention of dangerous destructive strains edge arrays depends on reliable assessment of emerging strains.