CONTROLLING STRESS-DEFORMED TALNAKH ARRAYS BY STRESS UNLOADING

Abstract

Link for citation: Golik V.I. Controlling stress-deformed Talnakh arrays by stress unloading. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 7, рр. 59-65. In Rus. Relevance. Underground mining of rock massifs of powerful deposits on deep horizons is accompanied by geomechanical phenomena, which are prevented by the construction of artificial structures made of solid mixtures in the developed space. Controlling geomechanics of the massif increases the completeness of subsoil use and is an actual direction of mining production. Objective: detailing the array state management technology by rationally regulating the voltages in the array. Object: arrays of deposits of the Talnakh ore node. Methods: modeling and experiment, the results of which are the basis for the development of a model and recommendations. Results. The paper introduces the assessment of the behavior of natural and artificial massifs differentially for the main deposits of the ore node. The regularities of combining options for unloading arrays from critical stresses are established: with overworking and with a protective layer underworking. The principles of optimization of ore mining technology taking into account the geomechanical features of the arrays are summarized. Measures to increase the volumetric compression of filling mixtures for variants of chamber systems of development are recommended. The results of modeling the influence of the volumes of rock inclusions on the efficiency of field development are presented. A model of ecological and economic assessment of technologies is proposed, taking into account the costs of creating protective layers and reducing the dilution of ores. Unloading of arrays from stresses provides an opportunity to regulate the stress level with a decrease in deformations, including during selective excavation of ores with the abandonment of rock layers in the bowels. Conclusions. Unloading arrays from operating stresses is an effective measure to solve the main problems of subsurface use at the same time. The implementation of this direction in the conditions of localization of the Talnakh ore deposits can be carried out by advanced excavation of the soil layer. The efficiency of working out stress-deformed arrays is achieved by the rational interaction of natural and technological factors of development.