Sofiiskyi К.К., Pеtukh O.P. The results of experimental research of the parameters of methane capturing by local degassing wells in the undermining area
- Details
- Parent Category: Geo-Technical Mechanics, 2019
- Category: Geo-Technical Mechanics, 2019, № 148
Geoteh. meh. 2019, 148, 153-161
https://doi.org/10.1051/e3sconf/201910900097
THE RESULTS OF EXPERIMENTAL RESEARCH OF THE PARAMETERS OF METHANE CAPTURING BY LOCAL DEGASSING WELLS IN THE UNDERMINING AREA
1Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine
UDC 622.831.325.3.001.6
Language: English
Absract. The article is devoted to the analysis of the mine instrumental measurements results of the local degassing system m3 seam at the horizon of 1100 m of the mine named after V.M. Bazhanova of State Сompany “Makiivugillia”. This is necessary to establish its basic rational parameters, followed by the use of a biotechnological method to reduce the concentration of methane in the atmosphere of mine workings. As a result of mine instrumental measurements (vacuum-gas surveys at the mouths of rising boreholes) the conditions for the use of methane capture by degassing boreholes, the parameters of the degassing process (methane production at the mouths of rising degassing boreholes and the average pressure on them, differential pressure on diaphragms, concentration methane in the gas-air mixture, as well as the efficiency criterion), technological parameters (angle of rotation and inclination of the boreholes, their length and diameter, casing of the wellhead pipes with a diameter of 100 mm or more, and the installation of conductors), the efficiency of the boreholes flow rate depending on the distance to the bottom of the longwall and the shift in the over- and undermined rocks are carried out according to the normative methodology. To optimize the parameters of the mixture being captured, it is necessary to quickly control the flow rate of boreholes and underpreassure at their borehole heads, taking into account the displacement parameters in specific mining-geological and mining engineering conditions of the coal seam excavation. Methods of such control can be the installation of diaphragms at the borehole heads or downhole water ejectors.
The developed degassing system is dynamic, it means, until longwalls moves, new rising boreholes were put into operation and boreholes that lost productivity in mine methane were shut off. The use of biofilters will make it possible to control the concentration of methane in the atmosphere of mine workings, reducing it by 3-4 times, by the methanotrophic bacteria, to ensure safe working conditions for miners and also gain experience in producing biomass from methane.
Keywords: mine methane, degassing, boreholes, biomass, bacteria.
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About the authors
Petukh Oleksandr Petrovych, Candidate of Technical Sciences (Ph.D), Senior Researcher in Department of Underground Coal Mining Technology, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM, NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.
Sofiiskyi Kostiantyn Kostiantynovych, Doctor of Technical Sciences (D. Sc.), Professor, Head of Department of Underground Coal Mining, Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine (IGTM, NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.