Numerical Simulation of Cracking Behavior of Precracked Rock under Mechanical-Hydraulic Loading
The cracking behavior of precracked rocks under mechanical-hydraulic loading is of great significance in underground openings or petroleum engineering. In this study, an advanced in-house finite element code PANDAS proved to be effective in simulating coupled fracturing processes under complex geolo...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2020/8852572 |
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| author | Zhong Zhang Chun-Chi Ma Tianbin Li Tao Song Huilin Xing |
| author_facet | Zhong Zhang Chun-Chi Ma Tianbin Li Tao Song Huilin Xing |
| author_sort | Zhong Zhang |
| collection | DOAJ |
| description | The cracking behavior of precracked rocks under mechanical-hydraulic loading is of great significance in underground openings or petroleum engineering. In this study, an advanced in-house finite element code PANDAS proved to be effective in simulating coupled fracturing processes under complex geological conditions was used to simulate the cracking propagation of the precracked rocks under mechanical loading and mechanical-hydraulic loading with different strength parameters. The simulation results demonstrated that (1) the cracks initiate by the induced stresses, and multiple types of tensile cracks originate from the preexisting flaws; (2) crack propagation patterns under mechanical-hydraulic loading were studied with different strength parameters, and the multiple patterns of pure tensile, main tensile, tensile-shear, main shear, and pure shear were observed; and (3) the timing of hydraulic loading has a significant impact on the fracturing process: when hydraulic loading was carried out in the phase of main crack propagation, the tensile fracture was promoted and the shear fracture was inhibited; when hydraulic loading was carried out in the phase of shear crack propagation, the shear fracture and tensile fracture were stimulated. The numerical simulation results are in good agreement with the experimental results by previous studies. The research on the cracking behavior of precracked rocks under mechanical and hydraulic loading will expand the application prospect in the fields of coal seam gas reservoir and tunnel water inrush. |
| format | Article |
| id | doaj-art-8ebd7f3cec984860a7477e6f46baf291 |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-8ebd7f3cec984860a7477e6f46baf2912025-08-20T03:37:16ZengWileyGeofluids1468-81151468-81232020-01-01202010.1155/2020/88525728852572Numerical Simulation of Cracking Behavior of Precracked Rock under Mechanical-Hydraulic LoadingZhong Zhang0Chun-Chi Ma1Tianbin Li2Tao Song3Huilin Xing4State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, ChinaState Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, ChinaState Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, ChinaState Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, ChinaFrontiers Science Center for Deep Ocean Multispheres and Earth System, Key Lab of Submarine Geosciences and Prospecting Techniques, MOE and College of Marine Geosciences, Ocean University of China, Qingdao 266100, AustraliaThe cracking behavior of precracked rocks under mechanical-hydraulic loading is of great significance in underground openings or petroleum engineering. In this study, an advanced in-house finite element code PANDAS proved to be effective in simulating coupled fracturing processes under complex geological conditions was used to simulate the cracking propagation of the precracked rocks under mechanical loading and mechanical-hydraulic loading with different strength parameters. The simulation results demonstrated that (1) the cracks initiate by the induced stresses, and multiple types of tensile cracks originate from the preexisting flaws; (2) crack propagation patterns under mechanical-hydraulic loading were studied with different strength parameters, and the multiple patterns of pure tensile, main tensile, tensile-shear, main shear, and pure shear were observed; and (3) the timing of hydraulic loading has a significant impact on the fracturing process: when hydraulic loading was carried out in the phase of main crack propagation, the tensile fracture was promoted and the shear fracture was inhibited; when hydraulic loading was carried out in the phase of shear crack propagation, the shear fracture and tensile fracture were stimulated. The numerical simulation results are in good agreement with the experimental results by previous studies. The research on the cracking behavior of precracked rocks under mechanical and hydraulic loading will expand the application prospect in the fields of coal seam gas reservoir and tunnel water inrush.http://dx.doi.org/10.1155/2020/8852572 |
| spellingShingle | Zhong Zhang Chun-Chi Ma Tianbin Li Tao Song Huilin Xing Numerical Simulation of Cracking Behavior of Precracked Rock under Mechanical-Hydraulic Loading Geofluids |
| title | Numerical Simulation of Cracking Behavior of Precracked Rock under Mechanical-Hydraulic Loading |
| title_full | Numerical Simulation of Cracking Behavior of Precracked Rock under Mechanical-Hydraulic Loading |
| title_fullStr | Numerical Simulation of Cracking Behavior of Precracked Rock under Mechanical-Hydraulic Loading |
| title_full_unstemmed | Numerical Simulation of Cracking Behavior of Precracked Rock under Mechanical-Hydraulic Loading |
| title_short | Numerical Simulation of Cracking Behavior of Precracked Rock under Mechanical-Hydraulic Loading |
| title_sort | numerical simulation of cracking behavior of precracked rock under mechanical hydraulic loading |
| url | http://dx.doi.org/10.1155/2020/8852572 |
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