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Method for calculation of the carrying capacity of the bottomhole zone of a gas-bearing formation
 
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Institute of Geotechnical Mechanics named by N. Poljakov of National Academy
 
 
Autor do korespondencji
Zakhar Rizo   

Institute of Geotechnical Mechanics named by N. Poljakov of National Academy
 
 
Mining Science 2023;30:135-145
 
SŁOWA KLUCZOWE
DZIEDZINY
STRESZCZENIE
This paper presents a method for calculating vertical and horizontal stresses in gas-bearing coal seams based on a set of equations developed by the authors. The method describes the experimental curve of rock pressure as a convex quadratic function, with the initial value of the function equal to the normal stress at the top of the bottom hole crack. The method also considers the variation of gas pressure as the crack moves towards the interior of the formation. In addition, the method employs the relationship between active tangential stresses at points on the edges of the bottomhole crack, derived from Coulomb's strength criteria for brittle materials. The accuracy of the method was confirmed by experimental data on the maximum shear strength of marble and brown coal at various levels of confining pressure and pore pressure. The paper also presents analytical expressions for the strength limit of the bottomhole zone of gas-bearing coal seams as a function of gas pressure gradient.
 
REFERENCJE (12)
1.
ALEKSEEV A.D., STARIKOV G.P., and CHISTOKLETOV V.N., 2010, Prognozirovanie neustoi-chivosti sistemy ugol’–gaz (Prediction of instability of the coal–gas system, Noulidzh, Donetsk.
 
2.
NIKOLIN V.I., MELIKSETOV S.S., and BERKOVICH M.M., 1967, Vybrosy porody i gaza (Rock and gas outbursts), Nedra, Moscow.
 
3.
NIKOLIN V.I., PODKOPAEV S.V., KHUDOLEY O.G., and MALEEV N.V., 2011, Geomekhaniche-skie zakonomernosti proyavleniy gornogo davleniya v glubokikh shakhtakh (Geomechanical pat-terns of manifestation of rock pressure in deep mines), Donbass, Donetsk.
 
4.
OLKHOVICHENKO A.E., 1982, Prognoz vybrosoopasnosti ugol’nykh plastov (Forecast of coal seam outburst hazard), Nedra, Moscow.
 
5.
SDVYZHKOVA O., GOLOVKO Y., and KLYMENKO D., 2017, Effect of harmonic oscillations on a crack initiation in the rock mass, Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, (4), 13–18.
 
6.
STAVROGIN A.N. and PROTOSENYA A.G., 1985, Prochnost’ gornykh porod i ustoychivost’ vyra-botok na bol’shikh glubinakh (Strength of rocks and stability of workings at great depths), Nedra, Moscow.
 
7.
TOMLENOV A.D., 1972, Teoriya plasticheskogo deformirovaniya metallov (Theory of plastic defor-mation of metals), Metallurgiya, Moscow (in Russian).
 
8.
VASILIEV D.L., 2014, Matematicheskaya model’ rascheta prigruzki opornogo davleniya na priza-boinuyu chast’ ugol’nykh plastov (Mathematical model of calculating the load of support pressu-re on the lower part of coal seams), Zb. nauk. pr. / NGU Ukrainy (Collection of scientific works of National Mining University of Ukraine), (45), 189–194.
 
9.
VASILIEV L.M., VASILIEV D.L., MALICH N.G., and ANGELOVSKIY A.A., 2018, Mekhanika obrazo-.
 
10.
vaniya form razrusheniya obraztsov gornykh porod pri ikh szhatii (Mechanics of the formation of forms.
 
11.
of destruction of rock samples under compression: a monograph), IMA-press, Dnipro.
 
12.
ZYKOV V.S., 2010, Vnezapnye vybrosy uglya i gaza i drugie gazodinamicheskie yavleniya v shakh-takh (Sudden outbursts of coal and gas and other gas-dynamic phenomena in mines), OOO “Fir-ma Poligraf” Kemerovo.
 
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ISSN:2300-9586
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