Vlasenko V. The substantiation of parameters opening steep outburst coal seams using hydrodynamic impact

The object of research: the processes of change in the state of stress of gas-saturated coal containing massif, the hydrodynamic impact(HDI), before the opening of the coal seam inclined to sudden outbursts of coal and gas. Objective of research: to provide a method to prevent sudden coal and gas outburst at the opening of steep coal seams by applying hydrodynamic impact through one technological borehole. Subject of research: patterns of change in the process parameters of opening coal seams prone to sudden outbursts of coal and gas, before their opening. Research methods. To achieve the objectives was used a set of theoretical and experimental studies: an analysis of the state of the coal seam and the ways to control the stress-strain state of the rocks; theoretical study of hydrodynamic impact, based on the main provisions of continuum mechanics; mine experimental studies that were carried out using the electrometric method of determining stresses in the rock mass, the study of the dynamics of the initial velocity of gas in the process of vibration exposure and after the change in the fortress of the coal seam and visual observations; methods of mathematical statistics. Scientific results: for the first time mathematical model numerical solution of filtration and examined the physical nature of the process of hydrodynamic impact on the fractured-porous gas-saturated environment; first installed a pattern of destruction of gas-saturated environments intense pulsed light of impact on the boundary free from tensions; are formulated the physical essence of the processes taking place in the coal array and pulse (wave) fracture mechanism under hydrodynamic forces, before its opening; set efficiency criteria - the number is removed from the coal seam of coal should be 2% of the treatment area, taking into account the effective radius of impact. Practical value is to provide: methods of mining and experimental works to improve the process parameters on the HDI coal seams prone to life threatening situations, before their opening through underground wells in the Central area of Donbass mines; technical requirements for the development of a method of HDI through an underground well on coal seams prone to gas-dynamic phenomena, before their opening; methods of acceptance (industrial) test method for of opening steep coal seams prone to sudden outbursts of coal and gas, crosscuts with HDI; technical specifications for the development of the SOU-I "Rules of hydrodynamic impact on borehole through the underground coal seams prone to gas-dynamic phenomena before their opening";method of mining and experimental work on assessing the effectiveness of DTG in the parameters of methane desorption device "desorbometrom" OJSC "ZUA" in carrying out measures for the prevention of coal and gas, with HDI before opening outburst seams; nomogram method of determining the parameters of the hydrodynamic impact with the power of coal seams; method prevent sudden coal and gas outburst at the opening of the coal seams through the use of hydrodynamic impact through one technological boreholes. Realization the results. The developed method of preventing coal and gas outburst at the opening of coal seams by applying through one HDI technology boreholes, was industrial tests at the intersection of 24 seams outburst l7 - "Devyatka", m3 - "Tolstuj", m2 - "Tonkij", k8 - "Derezovka "at the mine to named by Lenin SE "Artyomugol" and OE "Mine to named by Dzerzhinsky" SE "Dzerzhinskugol." Autopsies all processed seams were performed in accordance with 24 projects elaborated and passed without showing signs of gas-dynamic phenomena. The results of studies included in the standard SOU-I "Rules of hydrodynamic impact on borehole through the underground coal seams prone to gas-dynamic phenomena before their opening". Factual economic effect of the application of the developed method amounted to 376.8 thous. UAH.