Mineev S.P., Krukovskaya V.V., Krukovskiy A.P., Kocherga V.N. Change of methane filtration parameters in coal-rock massif around the gate road with different types of supports

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Parent Category: Geo-Technical Mechanics, 2016

Category: Geo-Technical Mechanics, 2016, Issue 126

Geoteh. meh. 2016, 126, 92-105

CHANGE OF METHANE FILTRATION PARAMETERS IN COAL-ROCK MASSIF AROUND THE GATE ROAD WITH DIFFERENT TYPES OF SUPPORTS
Mineev S.P., Krukovskaya V.V., Krukovskiy A.P., Kocherga V.N.
IGTM NAS of Ukraine

UDC 622.411.332.023.623:622.83

Abstract. Impact of gate road supporting method on the methane filtration process in the coalrock massif and efficiency of the methane-drainage borehole system functioning were studied with the help of numerical simulation methods. In the article, distribution of methane pressures and rates of methane filtrations are shown with no and with four different supports.

It is shown that with no gate road supporting, methane-drainage boreholes, being undermined, are ruined and do not work any more. Such measures as props, scaffolds and timber cribs reset operation of one borehole. Further strengthening of supports provides essential increase of methane flow rate in two methane drainage boreholes and significant efficiency improvement of the roof degassing through the boreholes.

It is further shown that methane flow rate is: minimal in methane drainage borehole located outside the filtration area around the mined-out space; stable - 60% of the maximum value - in zone with high fracture pattern; and reaches the highest values on the border with the zone of inelastic deformation and drops down to 0 with further decrease of slope angle over the horizon.

Keywords: methane filtration, gate road support, efficiency of roof degassing by boreholes.

REFERENCES

 

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About the authors:

Mineev Sergey Pavlovich, Doctor of Technical Sciences (D. Sc), Professor, M.S., head of department of Control of Dynamic Demonstrations of Rock Pressure, Polyakov Institute of Geotechnical Mechanics under the National Academy of Sciences of Ukraine, (IGTM, NASU), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .
Krukovskaya Victoriya Victorovna, Doctor of Technical Sciences (D. Sc), Senior Researcher, Senior Researcher in Department of Control of Dynamic Demonstrations of Rock Pressure, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .
Krukovskiy Alexander Petrovich, Doctor of Technical Sciences (D. Sc), Senior Researcher, Deputy Director of the institute, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .
Kocherga Viktor Nikolayevich, Master of Science, Сhief Technologist of Department of Pressure Dynamics Control in Rock, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

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