Numerical analysis on the crack propagation and failure characteristics of rocks with double fissures under the uniaxial compression
The fissures and rock bridges with different dips had different contributions to crack's initiation, propagation, convergence and penetration. In this paper, based on the rock fracture theory, the crack's propagation and evolution process on rock specimen with double fissures under uniaxia...
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KeAi Communications Co., Ltd.
2015-12-01
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Online Access: | http://www.sciencedirect.com/science/article/pii/S2405656115000644 |
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author | Leyong Chen Jianjun Liu |
author_facet | Leyong Chen Jianjun Liu |
author_sort | Leyong Chen |
collection | DOAJ |
description | The fissures and rock bridges with different dips had different contributions to crack's initiation, propagation, convergence and penetration. In this paper, based on the rock fracture theory, the crack's propagation and evolution process on rock specimen with double fissures under uniaxial compression was simulated. As a result, the crack propagation and evolution law of rocks with different fissure dips (α = 0°, 15°, 30°, 45°, 60°, 75°, 90°; β = 45°) and different rock bridge dips (β = 0°, 30°, 45°, 60°, 90°; α = 45°) was obtained by numerical tests. Meanwhile, the fissure and rock bridge dips influence on the macro mechanical properties of rock was analyzed. Besides, the paper investigated the influences of different fissure dips and different rock bridge dips on the bridge transfixion. The study is of great significance to reveal the impact of different dips on the mechanical mechanism of multiple-fissures rock under specific conditions, and it also has important theoretical significance for the research on multiple-fissure rock. |
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spelling | doaj.art-4d5f011985db4bb2a9c83c82b48f645f2022-12-21T22:06:06ZengKeAi Communications Co., Ltd.Petroleum2405-65612015-12-011437338110.1016/j.petlm.2015.10.009Numerical analysis on the crack propagation and failure characteristics of rocks with double fissures under the uniaxial compressionLeyong Chen0Jianjun Liu1Team 141 of Sichuan Coalfield Geology Bureau, Deyang, 618000, ChinaSchool of Geoscience and Technology, Southwest Petroleum University, Chengdu, 610500, ChinaThe fissures and rock bridges with different dips had different contributions to crack's initiation, propagation, convergence and penetration. In this paper, based on the rock fracture theory, the crack's propagation and evolution process on rock specimen with double fissures under uniaxial compression was simulated. As a result, the crack propagation and evolution law of rocks with different fissure dips (α = 0°, 15°, 30°, 45°, 60°, 75°, 90°; β = 45°) and different rock bridge dips (β = 0°, 30°, 45°, 60°, 90°; α = 45°) was obtained by numerical tests. Meanwhile, the fissure and rock bridge dips influence on the macro mechanical properties of rock was analyzed. Besides, the paper investigated the influences of different fissure dips and different rock bridge dips on the bridge transfixion. The study is of great significance to reveal the impact of different dips on the mechanical mechanism of multiple-fissures rock under specific conditions, and it also has important theoretical significance for the research on multiple-fissure rock.http://www.sciencedirect.com/science/article/pii/S2405656115000644Double fissures rockNumerical calculationFissure dipDip of rock bridgeFracture theory |
spellingShingle | Leyong Chen Jianjun Liu Numerical analysis on the crack propagation and failure characteristics of rocks with double fissures under the uniaxial compression Petroleum Double fissures rock Numerical calculation Fissure dip Dip of rock bridge Fracture theory |
title | Numerical analysis on the crack propagation and failure characteristics of rocks with double fissures under the uniaxial compression |
title_full | Numerical analysis on the crack propagation and failure characteristics of rocks with double fissures under the uniaxial compression |
title_fullStr | Numerical analysis on the crack propagation and failure characteristics of rocks with double fissures under the uniaxial compression |
title_full_unstemmed | Numerical analysis on the crack propagation and failure characteristics of rocks with double fissures under the uniaxial compression |
title_short | Numerical analysis on the crack propagation and failure characteristics of rocks with double fissures under the uniaxial compression |
title_sort | numerical analysis on the crack propagation and failure characteristics of rocks with double fissures under the uniaxial compression |
topic | Double fissures rock Numerical calculation Fissure dip Dip of rock bridge Fracture theory |
url | http://www.sciencedirect.com/science/article/pii/S2405656115000644 |
work_keys_str_mv | AT leyongchen numericalanalysisonthecrackpropagationandfailurecharacteristicsofrockswithdoublefissuresundertheuniaxialcompression AT jianjunliu numericalanalysisonthecrackpropagationandfailurecharacteristicsofrockswithdoublefissuresundertheuniaxialcompression |