DEVELOPMENT AND IMPLEMENTATION OF A MODEL FOR SUBSTANTIATION OF OPTIMAL TECHNOLOGICAL SCHEMES FOR THE MINING OF OUTBURST-PRONE COAL SEAMS
Authors:   Branch for Physics of Mining Processes of the M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine, Khorolskyi A. , Kosenko A. ,   Branch for Physics of Mining Processes of the M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine
Published: January 2023

Purpose. The purpose of the work is to develop a new approach to substantiate the optimal technological schemes for the mining of outburst-prone coal seams, which will ensure the minimum likelihood of sudden outbursts of coal and gas in the breakage face. Methodology. The integrated approach has been applied, involving the use of graphs, network models, optimization algorithms to find optimal technological solutions; application of energy-force models to assess the likelihood of sudden outbursts of coal and gas; application of dynamic programming to substantiate technological parameters (seam thickness, cutter-loader web width, length of a breakage face, etc.) for mining of outburst-prone coal seams. Results. In the course of the work, a new mathematical model has been obtained and implemented, which allows assessing the risks of a sudden outburst of coal and gas during the mining of coal seams. Based on the application of the model, an algorithm for substantiating technical and technological solutions has been developed. Technical solutions provide for the choice of means of mechanization of a breakage face, a mining schedule out a breakage face, measures for degassing a coal seam, while technological solutions provide for the justification of the length of a breakage face, the cutter-loader web width, and the speed of movement of the breakage face line. Scientific novelty. The originality lies in the creation of the mathematical model that allows assessing the likelihood of a sudden outburst of coal or gas, which made it possible to create a new approach based on the use of graphs and network models, as well as to determine the optimal technological solutions for mining coal seams. Practical significance. The practical value of the work lies in the creation of an application package for the selection of purification facility in accordance with certain technological solutions. The general algorithm for justifying technological schemes for mining outburst-prone coal seams involves the following sequence of actions: setting the initial parameters of a rock mass and breaking them into discrete values; for possible routes of the graph of technological solutions, the mathematical expectation and dispersion are determined; the probability of sudden outbursts of coal and gas for the studied parameters is determined; on the basis of the calculated probability, dependences of the occurrence of a coal or gas outburst are obtained in accordance with the values of the parameters (face length, the speed of movement of the breakage face line, etc.); on the basis of the data obtained, the optimal technological schemes for mining outburst-prone coal seams are substantiated; based on the application of a package of applied programs, mechanization means are selected. The scope of the above approach is not limited to the existing means of mechanization, mining and geological conditions of coal seams, existing technological schemes, and others.