Abstract
The research aimed at the analysis of influence exerted by re-extraction of ore reserves at the Zhezkazgan deposit on the condition of ground surface.The research involved the analysis, comparison and generalization of measurement data.The research findings revealed the features of impact of re-extraction on ground surface stability, and allowed prediction of deformations and substantiation of safety measures.Improvement of the high-precision leveling procedure with digital monitoring of ground surface displacements enables early and reliable prediction of ground surface condition under adverse effects of mining operations.Recommendations on design and deployment of geodynamic test sites in study areas can further help acquire information on rock mass and ground surface condition, and provide safety of mining thereby.During re-extraction of mineral reserves at the Zhezkazgan deposit, the values and velocities of subsidence along the survey profiles are constant and stable, which is ensured by backfill of mined-out voids.The geodetic survey results make it possible to create 3D images of ground surface in the test areas, which, in its turn, enables comparing the series of observations.