Geomechanical aspects of the gently falling deposits development with inclined walls chambers

Introduction. Technologies of extraction of valuable ores with filling of the worked-out space with hardening mixtures provide the best technical and economic indicators of production. Their disadvantage is the dilution of ores by the material of laying mixtures under the influence of natural and technological stresses. Of particular relevance are the issues of use for the management of mining pressure of enrichment waste. Materials and methods. To achieve this goal, a set of studies is carried out, including generalization of experience, full-scale measurements of rock mass parameters, laboratory studies and process modeling. The priority direction of solving the problem is the differentiation of the value of the angle of inclination of the cameras on the tab array. Results. It is determined that the efficiency of the full use of the subsoil is increased by optimizing the design of the purification chambers based on the regularities of the extraction of ore reserves in the interface zone with the laying array. It is proposed to combine the rock and hardening bookmark in a single process to increase the efficiency of work, creating volumetric compression conditions in ore-containing arrays that improve its performance, including reducing the dilution of ores. It is shown that the geo-mechanical aspect of combining technologies is to create a jamming zone of rock formations with the formation of a structure capable of withstanding emerging stresses. It was found that the inclination of the walls of the cleaning chambers in contact with the laying array towards the developed space in the range of 5–25 degrees reduces compressive stresses by approximately 1.6 times. Conclusion. Taking into account geodynamic factors when choosing a technology for the development of stressed arrays opens up prospects for replacing expensive components of the filling mixture with recyclable cheap industrial waste. The research results can be used in the improvement of technologies for the extraction of valuable ores at existing enterprises and the design of new technologies for the development of ore deposits, as well as in the educational process

Composite material · Dilution · Geotechnical engineering · Process engineering · Computer Science · Engineering · Engineering and Environmental Studies · Environmental Science · Geotechnical and Geomechanical Engineering · Materials Science · Mining and Gasification Technologies · Geology