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Home / Issues / № 4, 2014

Engineering

INCREASING TECHNICAL PRODUCTIVE CAPACITY OFMODERN MINING MACHINES AND COMPLEXES USED IN CONDITIONS OF MINES DANGEROUS INGAS FACTOR
Taho-Gody A.Z.

In conditions of coal mines dangerous in gas factor productive capacities ofminingmachinery are not usedcompletely . The main reason of it is a high intensity  of methane escape under conducting mining work ; it forces to stop mining machinery and be idle  for rather a long time until the concentration of methane increasing with the beginning of conductingmining work won’t  fall  to upper and safe concentration limitsunder the influence of  ventilation [1,2].  Forced idle time of this high productivity machineryranges up to  more than 50% of the duration of a working shift.It was earlier established [1,2] that the character ofgoing on gas-dynamics processes depends on the influence of  gas accumulated in the worked out space (up to70%),  on the methane escape from the transported coal ( up to 10%)  and  on the adjoining surface of  mining workings (up to 20%). So we made an attempt  to reduce  the intensity ofmethane escape from these sources significantly. It is suggested to usewateringof the walls being worked out  as well as transported dug out matter with the solutionof fast dryingmixtures, capable to form strong enough protective films, hermetically sealing(for a definite period of time) micro-cracks of a coal layer and rocks, through which gas releases  into the atmosphere ofmining workings.  For undertaking investigations we used somesolutions (as  satisfying safety requirements), such as water solution of  PVA glue, liquid glass, cement-sand solution, water solution of PVA glue with cement in different proportions, liquid glass without fillers and with fillers in the form of fine dispersed powder of sodium glass and cement. The experimental investigations were carried out under conditions of three starting-upmining workings of the coal mine "Southern 2", October district, Rostov region. The thickness of an applied  layer of watering mixtures varied within 2,5 - 3,0 mm. Specific expenditure of the mixtures for watering  varied within 1,5 - 2,0 l/m2.   As a result it was stated  that on the second day after applying  water solution of  PVA glue the intensity ofmethane escape had already loweredto 34,8%, with liquid glass application-to 48%, with the solution of liquid glass  in mixture with cement application - to59% [3].  An example of mining machinery modernizationis a variant of additional equipping of themining combine 1GKPS with the system of fast drying mixtureswatering( Fig.1). The realization of the given method suggests the accommodation of an additional capacity for watering on the combine  (approximately to 0,7м3), a pipe line from a pumping station of  low pressure ( up to 20 MPa) and pulverizing  means 1and 2 mounted upon the working organ of the combine and under its boom over the paw of a loading  device.

 

 

Fig.1. A possible variant of  accommodation the  system of watering  offastdrying mixtures onmining combine 1GKPS

 1-jet ofwatering mounted upon an active part of the working organ;

 2-jet  ofwatering mounted over loading device of the paw  type.



References:
1.AbramovF.A.,Feldman L.P., Svyatnyy V.A., Lapko V.V. On mathematical modeling of transitional air-gas-dynamics processes atmining areas .//Izvestiya vuzov.- Mining journal. №3.- 1967.- P.57-61.

2.Osipov S.N. Methane escape under mining of sloping coal layers - M.: Nedra.- 1964. - 256 p.

3.Taho-Godi A.Z. The wayof improving gas dynamics of mining areas of gas-bearing coal mines for the solution of a problem of syntheses of efficient system ofventilation management. The Patent of RF to theinvention № 2435963. Published 10.12.2011. Bulletin of the inventions№ 34.



Bibliographic reference

Taho-Gody A.Z. INCREASING TECHNICAL PRODUCTIVE CAPACITY OFMODERN MINING MACHINES AND COMPLEXES USED IN CONDITIONS OF MINES DANGEROUS INGAS FACTOR. International Journal Of Applied And Fundamental Research. – 2014. – № 4 –
URL: www.science-sd.com/459-24726 (22.05.2024).