Lukinov V.V., Bezruchko K.А., Drozhzha Т.М. Criteria for determining gas-saturated anomalous zones in enclosing rocks of the coal-bearing strata

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Parent Category: Geo-Technical Mechanics, 2016

Category: Geo-Technical Mechanics, 2016, Issue 127

 

Geoteh. meh. 2016, 127, 77-88

 CRITERIA FOR DETERMINING GAS-SATURATED ANOMALOUS ZONES IN ENCLOSING ROCKS OF THE COAL-BEARING STRATA

¹LukinovV.V., ¹BezruchkoK.А., ¹Drozhzha Т.М.

¹IGTM NAS of Ukraine 

UDC 622.411.332:533.17:551.24

Abstract. The article analyzes the key geological factors, which determine filtration-volumetric properties of the rock massif and influence formation of abnormal gas-saturated zones in geotechnological systems, namely technogeneous methane accumulations in coal-enclosing rocks in zones under the impact of underground mining operations: conditions of deposition accumulation, postdiagenetic changes and tectonic influences. As the criteria for the determining the abnormal gas-saturated zones in the enclosing rocks of coal-bearing strata the following physical characteristics were offered: open porosity ration, effective porosity ratio, relative gas saturation, residual water saturation, size of the main pore throats, absolute permeability and gas content. By these characteristics, quantitative criteria, characterizing zones with methane accumulation in the enclosing rocks of the coal-bearing strata were  determined. A new formula for determining the minimum gas content in zones with free methane accumulation in the enclosing rocks for different depths was offered. 
Keywords: coal-bearing rocks, physical characteristics, gas-saturated zones, quantitative criteria of gas-accumulation zones.

REFERENCES

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About the authors:

Lukinov Vyacheslav Vladimirovich, Doctor of Geology-Mineralogical Sciences (D.Sc), Principal Researcher of Department of Geology of Coal Beds at Great Depths, N.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. .

Bezruchko Konstantin Andreyevich, Doctor of Geology Sciences (D. Sc), Senior Researcher, Head of Department of Geology of Coal Beds at Great Depths, N.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. .

Drozhzha Tatyana Mikhaylovna, Master of Science, Principal Engineer of Department of Geology of Coal Beds at Great Depths, N.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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