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...

Full description

Bibliographic Details
Main Authors: Leyong Chen, Jianjun Liu
Format: Article
Language:English
Published: KeAi Communications Co., Ltd. 2015-12-01
Series:Petroleum
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S2405656115000644
_version_ 1818654852554686464
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.
first_indexed 2024-12-17T03:00:23Z
format Article
id doaj.art-4d5f011985db4bb2a9c83c82b48f645f
institution Directory Open Access Journal
issn 2405-6561
language English
last_indexed 2024-12-17T03:00:23Z
publishDate 2015-12-01
publisher KeAi Communications Co., Ltd.
record_format Article
series Petroleum
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