Мodeling of the Hydromechanical Processes of Slurry Formation and Movement During Hydromining of Zeolite-Smectite Tuffs

Abstract

The materials of theoretical and practical researches are aimed at improvement of mathematical models of individual technological operations of the technology of underground development of zeolite-smectite tuff deposits of the Rivne-Volyn region by the hydraulic well method, taking into account the dominant factors of the hydraulic mining process. The subject of the research is the parameters of hydrodynamic erosion of zeolitesmectite tuffs, the movement of the slurry in the conditions of the mining chamber and the transportation of the mineral. The work uses a comprehensive research method, which includes a system analysis and generalization of the experience of borehole hydromining, physical modeling of hydrodynamic processes, applied and bench research using industrial samples of technological equipment, as well as a mathematical modeling method - to establish dependencies between parameters well hydraulic mining. During the research and development of hydrodynamic mathematical models, the method of analyzing the processes of pulp flow over a conical surface was used, in which the stationary parameters of the flow process were determined and the influence of various factors on the uneven movement of slurry was investigated. In the proposed mathematical models, the dynamic characteristics of the process are sufficiently fully considered, and the parameters of the roughness of the solid boundary of the flow are also taken into account. On the basis of the conducted research, recommendations were developed for the use of well hydrotechnology depending on the state of the deposit and the composition of the rock, the method of selecting the parameters of the hydro-fracturing process and self-draining hydraulic transportation of zeolite-smectite tuffs along the bottom of the extraction chamber was investigated and improved. Proposed technological solutions for the installation of round-shaped mining chambers in thick layers of rock.