Modeling of the geomechanical state of the rock massifs being undermined repeatedly

The geomechanical model is proposed and the technology of numerical simulation developed. Carried out computer state being undermined repeatedly rock massifs 3 rd potash level Starobin deposit taking into account its structural strength features, as well technological schemes primary mining. regularities stress-strain zones formation in mass containing mined mine workings inter-panel pillars were determined. It shown that stability located areas significantly depends on time passed since mining location massif relative to operations. determined most dangerous for repeated are generalized shear, processes movement failure likely be active these areas. In compression, compaction caved take place. As a consequence, after considerable period time, can treated approximating natural state, without additional failures. such areas, effective mechanical characteristics practically restored. Therefore, greatest will achieved when they placed area compression stress zone caved, compacted rocks roadways faces.