ESTIMATION OF ACCORDANCE OF THE WATER FILTRATION LINEAR LAW TO THE REAL PRESSURE DYNAMICS OF WATER INFUSED INTO THE COAL LAYERS

UDC622.276:532.5

Authors:

Usov O.A., Ph.D. (Tech.), Senior Researcher

(IGTM NAS of Ukraine)

Abstract:

The theoretical analysis of influencing of expense of liquid and time of festering on pressure in a mining hole at the linear law of the Darsy filtration is executed. Influencing of resilient properties, forms and orientations of mining holes in relation to the scopes of coal layer and dependence of his permeability from hydraulic pressure was taken into account. It was shown that with 2D filtration process the well pressure behaves as constantly increasing, injection time-dependent function. This theoretical dependency doesn’t correspond fundamentally to the obtained results from the field tests which show the stabilization of the well pressure after certain time of water injection. But the characters of theoretical and practical dependencies coincide if applying the non-linear filtration law. The theoretical form of the indicator diagram for linear and non-linear filtration law depends on the right choice of the mathematical relation between pressure and coal bed permeability.

Keywords:

permeability, water flow rate, water pressure, indicator diagram, dynamic diagram, rock pressure.

References:

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2. Vasilyev, L. М. and Usov, O.A. (1980)«The definition rationals rejims of penetration liquid for coal bed», Izvestiya VUZov.Gorny Zhurnal, no.12, pp. 3– 7.

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4. Usov, O.A. (1985) «The establish law filtration liquid for rise effect of penetration coals beds», Abstract of Ph. D. dissertation, 05.15.11, IGTM, Dnepropetrovsk, SU.

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About the author:

Usov Oleg Aleksadrovich, Candidate of Technical Sciences (Ph.D), Senior Researcher in the Department of Rock Breaking Problems, M.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Sciences of Ukraine (IGTM, NASU), Dnepropetrovsk, Ukraine, Ця електронна адреса захищена від спам-ботів. вам потрібно увімкнути JavaScript, щоб побачити її.