Slashchov І.M. Estimation of fracture systems parameters in rock massif by the finite element method
- Деталі
- Батьківська категорія: Геотехнічна механіка, 2019
- Категорія: Геотехнічна механіка, 2019, № 147
Geoteh. meh. 2019, 147, 150-163
https://doi.org/10.1051/e3sconf/201910900094
ESTIMATION OF FRACTURE SYSTEMS PARAMETERS IN ROCK MASSIF BY THE FINITE ELEMENT METHOD
1Slashchov І.M.
1Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine
UDC 622.831.31
Language: English
Abstract.
. Results of analytical, laboratory and mine studies of parameters of disintegration zones in structurally-heterogeneous rocks and fracture systems around of the deep mine roadways are presented. The purpose of research is to improve safety and efficiency of underground mining operations by developing new methods, algorithms and modern specialized programs, which will determine parameters of zoning and spatial orientation of fracture system development in the rock massifs. Methods used: constructing the structures and software models of information systems for developing basic elements for software and information technology for geomechanical process calculation by the finite element method; mathematical modeling of the rock-massif stress-strain state by the finite element method; analysis and assessment of parameters of fracture systems in the structurally-heterogeneous rock massif. A mathematical model is proposed, which is realized with the help of the procedures of simulation modeling by finite element method. Based on the calculation of possible directions of the rock shearing (the “rock shear sites”) and breakage of bonds between the elements, the model allows determining orientation of dominant master fracture system development with taking into account natural structural defects in the rock massif. A new algorithm was created for determining master cracks and boundaries of disintegration zones with the layered rock, which differs by determining directions of rock shear sites in the elastoplastic problem considering residual strength and main structural defects of the structurally-heterogeneous rock massif. Regularities of organization of unidirectional rock shear sites and their distribution under the influence of mining operations in zones with inelastic deformations were established. The conducted studies disclose new possibilities for analyzing the stress-strain state of the rock massif allowing to forecast the most probable directions of crack development, and, therefore, to study complex geomechanical processes in more details.
Keywords: stress-strain state of rocks, crack systems, finite element method.
References
1. Thomas, J.R. Hughes (1987). The Finite Element Method: Linear Static and Dynamic Finite Element Analysis, Prentice-Hall.
2. Gallager, R. (1984). Finite Element Analysis. Fundamentals, Moscow: Nauka.
3. Fadeyev, A.B. (1987). The finite element method in geomechanics, Moscow: Nedra.
4. Zienkiewicz, О.С. (1971). Тhе Finite Element Method in Engineering Science, McGraw-Hill, New York.
5. Zienkiewicz, O.C., Taylor, R. L., Zhu J. Z. (2005). The Finite Element Method: Its Basis and Fundamentals, Butterworth-Heinemann.
6. Slashchov, A.I. (2016). Justification of the parameters of the information system assuring the underground mining safety, Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 1, 77-85.
7. Bulat, A.F., Slashchov, I.M. (2012). Development of computer systems mathematical modeling geomechanical processes, Geotekhnicheskaya Mekhanika, 99, 16-27.
8. Bulat, A.F., Slashchov, I.M., Slashchova, O.A. (2017). Evaluation methods of interconnected geomechanical and gas dynamic processes in the rock massif for the systems of working medium control in the mines, Geotekhnicheskaya Mekhanika, 59, 34-44.
9. Turchaninov, I.A., Iosif, E.V., Kasparyan, M.A. (1989). Fundamentals of rock mechanics, Leningrad: Nedra.
10. Shevchenko, V.G. and Slashchov, A.I. (2016). Validation of parameters and design of information system on the underground mining job safety with taking into account geomechanical factors, Geotekhnicheskaya Mekhanika, 128, 70-78.
11. Slashchov, I.M. (2012). Development of mathematical model and technology for computer analysis of tectonically disturbed structurally-heterogeneous rock massif, Geotekhnicheskaya Mekhanika, 104, 94-109.
12. Mikhaylov, A. Ye. (1973). Structural Geology and Geological Mapping, Moscow: Mir.
13. Churinov, M.V. (1978). Handbook of engineering geology, Moscow: Nedra.
About the authors
Slashchov Ihor Mykolayovych, Candidate of Technical Sciences (Ph.D), Senior Researcher, Senior Researcher in Department of Mineral Mining at Great Depths, Institute of Geotechnical Mechanics named by N. Poljakov NAS of Ukraine (IGTM, NAS of Ukraine), Dnipro, Ukraine, Ця електронна адреса захищена від спам-ботів. вам потрібно увімкнути JavaScript, щоб побачити її.