Anhelovskyi A. Substantiation of the hydrodynamic parameters of device for hydroimpulse loosenig of coal layers

Research object: the work processes of interaction of device for hydroimpulsive loosening of coal layers. Objective: establish patterns of change in the parameters of the dynamic load of coal layers and operating modes of the hydroimpulse loosening device to improve safety of mining operations. Subject of research: patterns of change in the parameters of the hydrodynamic load of coal layers, depending on the device operating mode. Research methods: analysis of the factors influencing the effective of blowout measures; simulation of pulsed liquid injection; statistical analysis of the results of laboratory, experimental and mining studies. Theoretical and practical results: given the solution of the hydrodynamic parameters of justification of device for hydroimpulsive loosening of coal layers; determined relationship of the hydrodynamic parameters of the device from the self-oscillation frequency and their comparison with the regularities variation of the load of impulsive parameters of coal layers; indicate a change in power-law dependence of impulsive energy flow from the backup pressure per time unit in the form of a falling power function. Were developed the device of hydroimpulsive loosening of outburst coal seams and carried out mining and experimental works, set parameters and operating modes of the device Degree of introduction: results are used in the development of methods, methodical recommendations and in addition to "technological project documentation" during the development workings in a JV "mining management" Molodogvardeyskaya" PJS "Krasnodonugol". The expected economic effect, in comparison with a static injection, is about 900 thousand. UAH. per year for one combine harvester. Novelty of the results is lies in making parameters of impulsive loading of coal layers and operating modes of hydroimpulsive loosening device; improvement of engineering method for calculating the hydrodynamic parameters of periodically stalling fluid flow; energy estimate of pulsed and static modes of fluid injection; depending establishing changes in fluid impact pressure in filtration part of borehole for a time. The developed devices are verified by patents of Ukraine and responded the modern world level. The results of carried out work should be used for the coal mines, project and scientific research institutes that are engaged in safety improvement works in developing of outburst coal layers.