Zolotin V. Substantiation of parametrs hydrodynamic method of prevention the gasdynamic effects at conducting of development workings by the blended working face

The operation purpose is the substantiation of arguments of a hydrodynamic way of prevention of the gasdynamic phenomena at conducting of development workings by the blended stope back on flat seams for increase of safety of conducting mining operations and paces of a drivage. Object of study is process structural change of a bench coal at hydrodynamic affecting. For solution of the formulated problems were used: idealised studies process of pressure release in a hole at hydrodynamic affecting on a bench coal, basing on fundamental laws of mechanics and hydraulics; laboratory investigations of magnitudes bond energy of water with a surface of dispersed coal and definition of quantity of the superficial and volume-linked water in dispersed coal with application of a thermal method of the analysis of forms of connection of a moisture with materials. Approbation of results of operation in the conditions of operating mine was carried out with use the current forecast of outburst hazard on a method of seismoacoustic check at well boring and acoustic activity of a bench in the course of hydrodynamic affecting and at conducting of development workings, and also visual observations. For the first time the stage-by-stage dodge of breaking down of coal and its crushing taking into account effect of cavitation, and also physical essence of hydrodynamic treating of an outburst-prone coal massive for effective and secure conducting of development workings by the blended stope back is erected; formation conditions clogging a stratum in a bench coal are instituted at showing in driving fluid of 20-30 % of fragments of the broken up coal by fineness of aggregate less than 0,04 mm; dependence of coefficient of outburst hazard and velocity of conducting of a development on arguments of hydrodynamic affecting that allows to mate degassing bench coal with the further deadlocking of methane in a massive is erected. Realisation of results of operation consists in the following: the requirement specification and the maiden edition is elaborated SOU "Rules of conducting hydrodynamic affecting for drop gasdynamic activity of bench coals at conducting of development workings"; the flow diagramme of a hydrodynamic way of prevention of the gasdynamic phenomena which one is engaged in drivage passports by the blended stope back on "Mine of A.F.Zasjadko" is elaborated; methods of application and recommendations are transmitted in MakNII and "Mine of A.F.Zasjadko" for compiling of complements to designs to conducting of development workings on benches, inclined to the gasdynamic phenomena. Hydrodynamic affecting is applied on benches, gas-hazardous, a dust, blow emanatings of methane, the gasdynamic phenomena, inclined to a spontaneous ignition, in the mated affected areas of geologic disturbances and the enhanced overburden pressure of II category in stope backs of development workings of air crossing of 14 longwalls of a bench l1, 2 western belt entries of a bench l4, 3 western belt entries of a bench l4, 4 western belt entries of a bench l4, on horizons of 802 m and 940 m that has allowed to make 269 m of development workings on outburst-prone zones without signs of the gasdynamic phenomena.