Authors define the effect exerted by mine-technical factors on the stability of temporal pillars and stope roofs in mining with combination of room-and-pillar and block caving. Pillar safety parameters are determined.

The article compares geomechanical estimates of structural elements of room-and-pillar method obtained by numerical calculations and physical simulation using photoelastic materials.

By numerical calculations safe and effective excavation of flat ore deposits was designed. The excavation is performed under conditions of advancing the front of breakage heading by the system of sublevel (level) caving and combined technology of caving and stowage. Laws of stress distribution in block massif were found out considering geological irregularities which influence the excavation parameters.

The new variant of system of working out sublevel caving is presented. Results of simulation of release of rock mass are stated. Rational parameters of technology on a condition of maximization of indicators of extraction of ore from bowels are defined. The comparative economic estimation of a way of extraction is given.

The geomechanical estimation of a condition of a file of species at the Makmalsky gold deposit is executed. Degree of stability of mining designs is defined at a variation of parametres of a natural force field of pressure. Perspective possibility of the further safe development of a deposit is established.