INFLUENCE OF FRACTURE INCIDENCE ANGLE ON THE LOCAL STRESS STATE OF THE NEAR-SLOPE ZONE OF THE OVERBURDEN LEDGE
Relevance. The stress-strain state of the rock massif during open-pit mining of mineral deposits, as well as during construction in excavations of significant size, depends on both the mechanical properties of rocks and the structural and textural features of the rock massif. In particular, the pres...
| Main Authors: | , , |
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| Format: | Article |
| Language: | Russian |
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Tomsk Polytechnic University
2021-12-01
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| Series: | Известия Томского политехнического университета: Инжиниринг георесурсов |
| Subjects: | |
| Online Access: | http://izvestiya.tpu.ru/archive/article/view/3475/2617 |
| _version_ | 1818471884218433536 |
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| author | Sergey O. Markov Alexey A. Khoreshok Maxim A. Tyulenev |
| author_facet | Sergey O. Markov Alexey A. Khoreshok Maxim A. Tyulenev |
| author_sort | Sergey O. Markov |
| collection | DOAJ |
| description | Relevance. The stress-strain state of the rock massif during open-pit mining of mineral deposits, as well as during construction in excavations of significant size, depends on both the mechanical properties of rocks and the structural and textural features of the rock massif. In particular, the presence of cracks in the near-slope zone of the ledge can significantly weaken its stability, and the direction and angle of crack incidence relative to the ledge slope change the location of stress zones within the massif relative to the surface of the outcrop. The identification of zones of increased mechanical stresses in order to predict the behavior of rock massifs with different structural-textural properties is an urgent scientific and practical task. The main aim is identification of the stress concentration zones in the near-slope part of the ledge in the rock massif with different structural-textural properties during open-pit mining. Methods: mathematical modeling of rock massifs with regard to their physical and mechanical properties and structural and textural features using the finite element method, processing the results of experimental studies. Results. The paper introduces the description of the mathematical model of the elastic behavior of a natural fractured rock massif with an outcrop surface in the form of a ledge, as well as the laws of stress concentration distribution in it. The stress-strain state of loaded and unloaded massifs in the undisturbed and disturbed by cracks of different orientation states is described, and their values for ledges with different structure are compared. The authors have revealed the increased values of tensile stresses in the massif in the direction of crack incidence from the ledge slope compared to the undisturbed state and in the direction of crack incidence toward the ledge slope. |
| first_indexed | 2024-04-14T03:57:55Z |
| format | Article |
| id | doaj.art-27de11e25772416db62f78efc6ed53f0 |
| institution | Directory Open Access Journal |
| issn | 2500-1019 2413-1830 |
| language | Russian |
| last_indexed | 2024-04-14T03:57:55Z |
| publishDate | 2021-12-01 |
| publisher | Tomsk Polytechnic University |
| record_format | Article |
| series | Известия Томского политехнического университета: Инжиниринг георесурсов |
| spelling | doaj.art-27de11e25772416db62f78efc6ed53f02022-12-22T02:13:42ZrusTomsk Polytechnic UniversityИзвестия Томского политехнического университета: Инжиниринг георесурсов2500-10192413-18302021-12-013321221121910.18799/24131830/2021/12/3475INFLUENCE OF FRACTURE INCIDENCE ANGLE ON THE LOCAL STRESS STATE OF THE NEAR-SLOPE ZONE OF THE OVERBURDEN LEDGESergey O. Markov0Alexey A. Khoreshok1Maxim A. Tyulenev2T.F. Gorbachev Kuzbass State Technical University; Mezhdurechensk Branch of T.F. Gorbachev Kuzbass State Technical UniversityT.F. Gorbachev Kuzbass State Technical UniversityT.F. Gorbachev Kuzbass State Technical UniversityRelevance. The stress-strain state of the rock massif during open-pit mining of mineral deposits, as well as during construction in excavations of significant size, depends on both the mechanical properties of rocks and the structural and textural features of the rock massif. In particular, the presence of cracks in the near-slope zone of the ledge can significantly weaken its stability, and the direction and angle of crack incidence relative to the ledge slope change the location of stress zones within the massif relative to the surface of the outcrop. The identification of zones of increased mechanical stresses in order to predict the behavior of rock massifs with different structural-textural properties is an urgent scientific and practical task. The main aim is identification of the stress concentration zones in the near-slope part of the ledge in the rock massif with different structural-textural properties during open-pit mining. Methods: mathematical modeling of rock massifs with regard to their physical and mechanical properties and structural and textural features using the finite element method, processing the results of experimental studies. Results. The paper introduces the description of the mathematical model of the elastic behavior of a natural fractured rock massif with an outcrop surface in the form of a ledge, as well as the laws of stress concentration distribution in it. The stress-strain state of loaded and unloaded massifs in the undisturbed and disturbed by cracks of different orientation states is described, and their values for ledges with different structure are compared. The authors have revealed the increased values of tensile stresses in the massif in the direction of crack incidence from the ledge slope compared to the undisturbed state and in the direction of crack incidence toward the ledge slope.http://izvestiya.tpu.ru/archive/article/view/3475/2617finite element methodstress-strain staterock stabilityfracturingstress concentrationrock massif structure |
| spellingShingle | Sergey O. Markov Alexey A. Khoreshok Maxim A. Tyulenev INFLUENCE OF FRACTURE INCIDENCE ANGLE ON THE LOCAL STRESS STATE OF THE NEAR-SLOPE ZONE OF THE OVERBURDEN LEDGE Известия Томского политехнического университета: Инжиниринг георесурсов finite element method stress-strain state rock stability fracturing stress concentration rock massif structure |
| title | INFLUENCE OF FRACTURE INCIDENCE ANGLE ON THE LOCAL STRESS STATE OF THE NEAR-SLOPE ZONE OF THE OVERBURDEN LEDGE |
| title_full | INFLUENCE OF FRACTURE INCIDENCE ANGLE ON THE LOCAL STRESS STATE OF THE NEAR-SLOPE ZONE OF THE OVERBURDEN LEDGE |
| title_fullStr | INFLUENCE OF FRACTURE INCIDENCE ANGLE ON THE LOCAL STRESS STATE OF THE NEAR-SLOPE ZONE OF THE OVERBURDEN LEDGE |
| title_full_unstemmed | INFLUENCE OF FRACTURE INCIDENCE ANGLE ON THE LOCAL STRESS STATE OF THE NEAR-SLOPE ZONE OF THE OVERBURDEN LEDGE |
| title_short | INFLUENCE OF FRACTURE INCIDENCE ANGLE ON THE LOCAL STRESS STATE OF THE NEAR-SLOPE ZONE OF THE OVERBURDEN LEDGE |
| title_sort | influence of fracture incidence angle on the local stress state of the near slope zone of the overburden ledge |
| topic | finite element method stress-strain state rock stability fracturing stress concentration rock massif structure |
| url | http://izvestiya.tpu.ru/archive/article/view/3475/2617 |
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