The object of researches - the processes of safe working out of gas-bearing coal seams when moving an array of rocks. The purpose of the work is to establish the regularities of gas emission from the fake coal-bearing massif, depending on the geomechanical processes of displacemen the rocks and the earth's surface, developing a gas emission forecasting methodic, and improving the regulatory framework for the safe working out of gas-bearing coal seams to reduce accidents and injuries in coal mines. Research methods: analysis and synthesis of scientific and practical experience on methane emission and methods of its prognosis, experimental studies of the level of methane emissions within the section and the entire mine field, the synthesis of known results of the study of geomechanical processes of displacemen of the earth's surface and forged rocks that were obtained during the last n 'thirty years, methods of mathematical modeling of geomechanical processes of displacement of rocks and the earth's surface, statistical methods of processing the results are investigated . For the first time established, the size of the working, in which the processes of displacemen the rocks reach the earth's surface, depending on the mining and geological and mining engineering factors, allows you to determine the location of the point at which the subsidence of the earth's surface begins. For the first time, regularities have been established for changing the geomechanical parameters of the displacemen the rocks and the earth's surface from the mining and geological conditions of the treatment works: the angles of complete shifts; angles of maximum subsidence of rocks; trajectories of maximum subsidence of points of the earth's surface and development of a new methodological approach to the determination of these parameters. For the first time the laws of reaching the maxima of methane emissions have been established, depending on the degree of development of the treatment works within the excavation area and the entire mine field. In developing a new methodological approach to the forecast of maximum gas emission from the fake coal-bearing massif. For the first time, regularities have been established for increasing coal production to achieve planned targets and changes in current gas emission, and to develop a new methodological approach to forecasting gas emission with simultaneous increase of coal production and development of cleaning works. For the first time, the laws of fluctuation of gas evolution from the fake coal-bearing massif and the development of a new physico-mathematical model for the formation of gas evolution under the influence of geomechanical factors are established, in accordance with the proposed theory of the occurrence of local and absolute maxima of methane release. For the first time a physico-mathematical model was developed for determining the parameters of geomechanical processes using trajectories of maximum subsidence of points of the earth's surface, which allowed to establish reliably the geomechanical parameters of the displacemente of rocks, including the size of their displacement zones with continuity rupture. The technical solutions for determination of the parameters of geomechanical processes for the establishment of rock displacemen zones with the rupture of their continuity have been developed, which allows one to establish boundaries in the coal-bearing massif from which gas evolution takes place. A new methodic for determining the geomechanical characteristics of the displacemen of rocks is developed, which binds together the main influencing factors. The methodic of forecasting gas emission from the coal-bearing layer is developed, depending on the parameters of the displacement of the rocks and the surface of the earth, which allows to take into account the development of the treatment works both within the separate section and in the wing of the mine field. The methodical recommendations for the analysis of compliance of provisions of the normative document with the practice of conducting mining operations in the part of gas emission from a fake coal-bearing massif are developed. The results of theoretical and experimental research obtained in the thesis were implemented with the forecast of gas emission under the conditions of the mine named after D.F. Melnykova PC "Lisichanskugol". The estimated economic effect from the implementation of recommendations for the safe working out of the 1st northern lava of the was about 1800 thousand. uah/year
Prepared and submitted at Institute of Geotechnical Mechanics M.S. Polyakova NAS of Ukraine proposals for the improvement of the “Guidelines for the design of ventilation of coal mines” regarding the gas emission forecast and the selection of ventilation patterns for excavation sites.
