Method for calculation of the carrying capacity of the bottomhole zone of a gas-bearing formation

• Autorzy: Rizo Zakhar , Vasyliev Leonid , Vasyliev Dmytro , Avramenko Stanislav

Identyfikatory

DOI

10.37190/msc233008

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

rock; strength limit; destruction; crack; bottomhole zone

• Wydawca: Wydział Geoinżynierii, Górnictwa i Geologii, Instytut Górnictwa Politechniki Wrocławskiej
• Czasopismo: Mining Science
• Rocznik: 2023
• Tom: Vol. 30
• Strony: 135--145
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Rizo Zakhar

• Institute of Geotechnical Mechanics named by N. Poljakov of National Academy, Ukraine

• https://orcid.org/0000-0002-8271-7886

autor

Vasyliev Leonid

• Institute of Geotechnical Mechanics named by N. Poljakov of National Academy, Ukraine

• https://orcid.org/0000-0002-8146-0812+

autor

Vasyliev Dmytro

• Institute of Geotechnical Mechanics named by N. Poljakov of National Academy, Ukraine

• https://orcid.org/0000-0001-6864-357X

autor

Avramenko Stanislav

• Institute of Geotechnical Mechanics named by N. Poljakov of National Academy, Ukraine

• https://orcid.org/0009-0006-2080-9028

Bibliografia

• ALEKSEEV A.D., STARIKOV G.P., and CHISTOKLETOV V.N., 2010, Prognozirovanie neustoichivosti sistemy ugol’–gaz (Prediction of instability of the coal–gas system, Noulidzh, Donetsk.
• NIKOLIN V.I., MELIKSETOV S.S., and BERKOVICH M.M., 1967, Vybrosy porody i gaza (Rock and gas outbursts), Nedra, Moscow.
• NIKOLIN V.I., PODKOPAEV S.V., KHUDOLEY O.G., and MALEEV N.V., 2011, Geomekhanicheskie zakonomernosti proyavleniy gornogo davleniya v glubokikh shakhtakh (Geomechanical patterns of manifestation of rock pressure in deep mines), Donbass, Donetsk.
• OLKHOVICHENKO A.E., 1982, Prognoz vybrosoopasnosti ugol’nykh plastov (Forecast of coal seam outburst hazard), Nedra, Moscow.
• 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.
• STAVROGIN A.N. and PROTOSENYA A.G., 1985, Prochnost’ gornykh porod i ustoychivost’ vyrabotok na bol’shikh glubinakh (Strength of rocks and stability of workings at great depths), Nedra, Moscow.
• TOMLENOV A.D., 1972, Teoriya plasticheskogo deformirovaniya metallov (Theory of plastic deformation of metals), Metallurgiya, Moscow (in Russian).
• VASILIEV D.L., 2014, Matematicheskaya model’ rascheta prigruzki opornogo davleniya na prizaboinuyu chast’ ugol’nykh plastov (Mathematical model of calculating the load of support pressure 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.
• VASILIEV L.M., VASILIEV D.L., MALICH N.G., and ANGELOVSKIY A.A., 2018, Mekhanika obrazovaniya form razrusheniya obraztsov gornykh porod pri ikh szhatii (Mechanics of the formation of forms of destruction of rock samples under compression: a monograph), IMA-press, Dnipro.
• ZYKOV V.S., 2010, Vnezapnye vybrosy uglya i gaza i drugie gazodinamicheskie yavleniya v shakhtakh (Sudden outbursts of coal and gas and other gas-dynamic phenomena in mines), OOO “Firma Poligraf” Kemerovo.