Dudlia K. Validation of parameters and development of facilities for improving safety of transportation and utilization of coal mines methane.

The purpose of the work is to validate the parameters and develop the facilities for impruving safety of transportation and utilization of coal mines methane. The object of research. The processes for improving safety of extraction, transportation and utilization of coal mines methane. Subject of research: patterns and trouble-free operation parameters of structural and technological extraction and utilization scheme of coal mines methane. Research methods. To achieve the objectives were used: empirical and semi-empirical methods for calculating gas transportation system and design searching, methods for hydraulic calculation of gas networks, methods for mathematical and computer modeling of geotechnical systems in developing simulation models for design and research of surface degassing systems, experimental researches in industrial environments. Scientific results: for the first time, the ratio regularity of oxygen and methane concentrations, which determines the boundary of explosion safety of gas pipelines, was established; for the first time, the dependence of the equivalent aerodynamic resistance from product of absolute pressure on the consumption from all wells, on absolute pressure and on input to utilization station was established, which serves to determine the criterion of trouble-free operation of the surface gas transmission system; for the first time, the dependence of methane compressibility coefficient on the pseudo-reduced safe surplus pressure and pseudo-reduced temperature was established; the simulation model of the safe operation of the surface gas transmission system was developed, for calculating the pressures and costs of wells. The practical significance is to provide: methods of conducting experimental research in industrial conditions, which allows to determine the accuracy of measurement and calculation of gas consumption at the inlet pipeline and the efficiency of the Ergomera controller -126.MU in conjunction with the operator station "DIJA"; algorithm for calculation of surface degassing systems parameters; structural-technological scheme for ensuring reliable and trouble-free operation of pipelines on the surface of the excavated mining tunels and for protection them from hydrate formation; facilities of transport safety and utilization of coal mine methane and a method for determining the explosion limit of coal mine methane. The implementation of results. The method of conducting experimental tests in the industrial environment of the universal controller with autonomous power supply «Ergomera-126MU» in conjunction with the operation station «DIIA»; the design documentation, two engineering samples of diaphragm and experimental sample of module automatic control systems of mines degassing; the expected annual economic effect from the introduction of a patented method for determining the explosion limit of coal mine methane was UAH 6 180 807 per year.