Issue |
E3S Web Conf.
Volume 192, 2020
VIII International Scientific Conference “Problems of Complex Development of Georesources” (PCDG 2020)
|
|
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Article Number | 04003 | |
Number of page(s) | 7 | |
Section | Innovative Technologies and Methods for Monitoring Natural and Mining Systems | |
DOI | https://doi.org/10.1051/e3sconf/202019204003 | |
Published online | 30 September 2020 |
Numerical simulation study on rheological failure characteristics of rock mass under high stress
1
School of Civil and Resource Engineering, University of Science and Technology Beijing, 100083 Beijing, China
2
Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mine, University of Science and Technology Beijing, 100083 Beijing, China
* Corresponding author: qiulm@ustb.edu.cn
This paper uses the RFPA numerical simulation software to establish a numerical model of the rheological failure of the rock mass under stress. Rheological failure characteristics of the body was researched, and the results shows: (1) The rupture sequence of rock rupture is from the corner to the middle. When the rock loses stability under pressure, the rock often ruptures from the corner. The corner gradually collapses and cracks. Then the cracks spread to the middle of the rock. Many cracks extending from the corners are in the rock. The central part intersects each other and eventually causes the rock to break. (2) Rock samples of different lithologies have different stress values when they break under the same confining pressure. From the experimental process, we know that granite>sandstone>mudstone. Therefore, the higher the strength of the rock, the harder the rock will be broken. (3) The weaker the plasticity at rupture, the stronger the brittleness and the stronger the sudden change of rupture. In the deep mining process, the greater the confining pressure, the more obvious the rheological characteristics of the rock, and the greater the total energy released during the rock failure process.
Key words: deep mining / rock mass rheology / failure characteristics / numerical simulation
© The Authors, published by EDP Sciences, 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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