Assessment of the degree of disturbance of the undermined strata by technogenic water conducting fractures according to geomechanical monitoring in the excavations of Yakovlevski mine

According to the results of geomechanical monitoring in the  excavations of  Yakovlevski mine distribution of zone water conducting fractures in consequence of displacement and deformation of rocks from concrete backfilling voids evaluated. The convergence of the boundary curvature and the curvature obtained from observations of strata movement to a single span istaken into consideration.