The purpose of the work is to establish patterns of influence for method guarding the excavation drift on the stability of degassing wells in uncontrolled workings, methane production in them and justifying the parameters for method degassing the excavation site to increase the efficiency of its degassing. Object of research – processes of deformation a coal-bearing massif and filtration of methane in it during the implementation of degassing wells drilled towards a clearing face. To solve the set tasks, a complex of theoretical and experimental studies was used: analysis of the ventilation patterns of the excavation sites and efficiency on degassing methods used; theoretical studies of the deformation of the developed coal-bearing massif from the degassing wells, based on the basic principles of continuum mechanics; mining experimental studies, which included systematic observations of well performance at different locations and parameters, calculation of uncontrolled production deformation with various methods of its attachment, monitoring of rock deformations containing uncontrolled production using depth and contour rapper, cavern gauge of degassing wells. The main theoretical results: 1) guarding the excavation drift reduces the hazardous component of the stress field around the working out reduces the area of inelastic deformations over the generated space and increases the stability of degassing wells in cubic dependence when using wooden boons on 6-20%; of boons and two rows of breaker props - 30-33%; of rubble boons and two rows of breaker props - by 43-50%; of rubble boons, two rows of breaker props and billet stopping - 45-56%; 2) the flow rate of methane in the degassing wells is minimal at their location outside the filtration area around the developed space; stable and is 60% of the maximum in the zone of increased fracturing; reaches maximum values at the boundary with the zone of inelastic deformations and decreases to zero along a parabolic dependence with a further decrease in the angle inclination to the horizon. Scientific novelty of the results: 1) for the first time, a method was developed for calculating the parameters of the stress-strain state of a coal-bearing massif from degassing wells to evaluate the filtration of methane in them, taking into account the method of protecting the excavation drift; 2) for the first time, the influence of various security structures on the geomechanics formation of a collapse zone above the developed lava space near the excavation drift and the stability of drainage wells to determine the effectiveness of their work in uncontrolled working out; 3) for the first time, the dependence of the flow rate of the methane-air mixture in the degassing wells on its location relative to the zone of destruction over the developed space of the lava, calculated taking into account the influence of the method of guarding the excavation drift, was determined. The practical significance of the results is to develop: 1) the method of industrial testing of the method of degassing the excavation section with the use of wells and gas pipelines, which remain in uncontrolled developments; 2) a method is developed for degassing the excavation site using wells in uncontrolled developments. The research results were included in the Standard of Ukraine 10.1.00174088.001-2004 “Degassing of coal mines. Requirements for degassing methods and schemes” in the form of an addition to the “Rules for applying the method of degassing an excavation areas using gas pipelines, remain in uncontrolled workings”(Order of the Ministry of Fuel and Energy of Ukraine dated December 28, 2012 No. 1100) which was used in the development of 26 "Projects of degassing excavation areas" in 2016-2017 for State Enterprise «Coal Company «Krasnolymanska», State Enterprise «M.S. Surgaya mine», «Pokrovskoye», «Yubileinaya» and «Stepova» Mine Administration, Production structural subdivision "Mine Pershotravenskoye" of the Private Joint Stock Company "DTEK Pavlogradugol", "Stepova" "Lvovol of Mine Management", "Western-Donbasskaya" "Ternovskoye Mine Management", "Stakhanov" "Krasnoarmeiskugol Mine Management", "Belozerskaya mine", Novodonetskaya "Additional Liability Company" Belozerskaya ". The actual economic effect from the use of an improved coal seam degassing process at the Krasnolimanskaya coal mine. The state-owned enterprise Krasnolimanskaya Coal Company for 2006-2009. amounted to 334.7 million uan (calculation of economic efficiency from 11.09.2009). The results of the work should be used by coal-mining enterprises, design and research institutes dealing with the development of coal-gas fields, the development and introduction of new and improvement of existing technologies of underground coal mining and utilization of methane, as well higher educational institutions of mining and geology.
