Simulation of Transcendental Deformation Mode of Interchamber Pillars and Ore Deposit in the Course of Development of Bauxite Resources at Great Depth on the Example of Mine "Sevuralboksitruda"

The publication describes the problem of transcendental deformation mode of interchamber pillar and ore deposit associated with the formation of hazardous zones in the rock mass in process of development of rockburst-hazardous rock masses at the great depth. Geomechanical software PRESS 3D URAL is used to assess the impact of the range of geological and technological factors on the mode of interchamber pillars deformation and ore deposit. The software allows to solve spatial problems in the elastic-plastic formulation. The results of step-by-step modeling of different mining and technical situations with a test of the bearing capacity of interchamber pillars showed that some of them can't withstand the mountain pressure and go to the transcendental mode of deformation with subsequent destruction. Identification of the destroyed pillars allows to adjust the boundary conditions of loading the ore mass. At the same time the neglect of transcendental mode of deformation of interchamber pillars can lead to an undervaluation of the stress level in the ore mass by 1.5 or more times. This can lead to an error in predicting the parameters of zones dangerous due to rock bumps

Modeling a Stress Condition of Ore Massif in the Process of Bauxite Deposits Development in the Mines of "Sevuralboksitruda"

The publication examines the problems of concentrator of elevated tension formation in pillars and ore massif. The article presents the results of modeling the stress state of interchamber pillars and ore deposits, using specialized geomechanical software PRESS 3D URAL. In the process of numerical experiments, it was found that the increase of natural flexibility in pillars leads to a decrease of normal stresses in comparison with the variant of a stiff scheme. If interchamber pillar involves different varieties of ores, there is a redistribution of stress on the site with more stiff ores. The article shows that the stress state control of interchamber pillars and ore massif in conditions of OJSC "Sevuralboxitruda" can be achieved by drilling relief holes

Assessment of Stress-Strain and Shock Bump Hazard of Rock Mass in the Zones of High-Amplitude Tectonic Dislocations

The paper analyses geodynamic processes in the development of the Talnakh and Oktyabrsk deposits, which have complex geological structure. It demonstrates the results of the forecast estimation of seismic energy released on the contact surface of the fault plane of type I and II tectonic dislocations when stoping approaches. The article discusses the geodynamic processes occurring during the mining of the Talnakh and Oktyabrsky deposits of complex geological structure. The results of predictive assessments of seismic energy released at the contact surface displacement of a tectonic disturbance type I and II at the approach of remediation. For practical use of the obtained graph of the dependence of critical distance from the front of the treatment works to a tectonic disturbance on the magnitude of the angle of internal friction