Numerical Simulation of Rock Failure Process with a 3D Grain-Based Rock Model
A grain-based rock model was developed and applied to study mechanical characteristics and failure micromechanics in thick-walled cylinder and wellbore stability tests. The rock is represented as an assembly of tetrahedral blocks with bonded contacts. Material heterogeneity is modeled by varying the...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2020-01-01
|
| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/8810022 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832550498134130688 |
|---|---|
| author | Zengwei Zhang Fan Chen Chao Zhang Chao Wang Tuo Wang Fengshou Zhang Huiling Zhao |
| author_facet | Zengwei Zhang Fan Chen Chao Zhang Chao Wang Tuo Wang Fengshou Zhang Huiling Zhao |
| author_sort | Zengwei Zhang |
| collection | DOAJ |
| description | A grain-based rock model was developed and applied to study mechanical characteristics and failure micromechanics in thick-walled cylinder and wellbore stability tests. The rock is represented as an assembly of tetrahedral blocks with bonded contacts. Material heterogeneity is modeled by varying the tensile strength at the block contacts. This grain-based rock model differs from previous disk/sphere particle-based rock models in its ability to represent a zero (or very low) initial porosity condition, as well as highly interlocked irregular block shapes that provide resistance to movement even after contact breakage. As a result, this model can reach higher uniaxial compressive strength to tensile strength ratios and larger friction coefficients than the disk/sphere particle-based rock model. The model captured the rock fragmentation process near the wellbore due to buckling and spalling. Thin fragments of rock similar to onion skins were produced, as observed in laboratory breakout experiments. The results suggest that this approach may be well suited to study the rock disaggregation process and other geomechanical problems in the rock excavation. |
| format | Article |
| id | doaj-art-82f24134412742ca9b78a7c9383823cf |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-82f24134412742ca9b78a7c9383823cf2025-02-03T06:06:32ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/88100228810022Numerical Simulation of Rock Failure Process with a 3D Grain-Based Rock ModelZengwei Zhang0Fan Chen1Chao Zhang2Chao Wang3Tuo Wang4Fengshou Zhang5Huiling Zhao6PowerChina RoadBridge Group Co., Ltd., Beijing 100048, ChinaPowerChina RoadBridge Group Co., Ltd., Beijing 100048, ChinaPowerChina RoadBridge Group Co., Ltd., Beijing 100048, ChinaPowerChina RoadBridge Group Co., Ltd., Beijing 100048, ChinaDepartment of Geotechnical Engineering, Tongji University, Shanghai 200092, ChinaDepartment of Geotechnical Engineering, Tongji University, Shanghai 200092, ChinaDepartment of Civil Engineering, Shanghai University, Shanghai 200444, ChinaA grain-based rock model was developed and applied to study mechanical characteristics and failure micromechanics in thick-walled cylinder and wellbore stability tests. The rock is represented as an assembly of tetrahedral blocks with bonded contacts. Material heterogeneity is modeled by varying the tensile strength at the block contacts. This grain-based rock model differs from previous disk/sphere particle-based rock models in its ability to represent a zero (or very low) initial porosity condition, as well as highly interlocked irregular block shapes that provide resistance to movement even after contact breakage. As a result, this model can reach higher uniaxial compressive strength to tensile strength ratios and larger friction coefficients than the disk/sphere particle-based rock model. The model captured the rock fragmentation process near the wellbore due to buckling and spalling. Thin fragments of rock similar to onion skins were produced, as observed in laboratory breakout experiments. The results suggest that this approach may be well suited to study the rock disaggregation process and other geomechanical problems in the rock excavation.http://dx.doi.org/10.1155/2020/8810022 |
| spellingShingle | Zengwei Zhang Fan Chen Chao Zhang Chao Wang Tuo Wang Fengshou Zhang Huiling Zhao Numerical Simulation of Rock Failure Process with a 3D Grain-Based Rock Model Advances in Civil Engineering |
| title | Numerical Simulation of Rock Failure Process with a 3D Grain-Based Rock Model |
| title_full | Numerical Simulation of Rock Failure Process with a 3D Grain-Based Rock Model |
| title_fullStr | Numerical Simulation of Rock Failure Process with a 3D Grain-Based Rock Model |
| title_full_unstemmed | Numerical Simulation of Rock Failure Process with a 3D Grain-Based Rock Model |
| title_short | Numerical Simulation of Rock Failure Process with a 3D Grain-Based Rock Model |
| title_sort | numerical simulation of rock failure process with a 3d grain based rock model |
| url | http://dx.doi.org/10.1155/2020/8810022 |
| work_keys_str_mv | AT zengweizhang numericalsimulationofrockfailureprocesswitha3dgrainbasedrockmodel AT fanchen numericalsimulationofrockfailureprocesswitha3dgrainbasedrockmodel AT chaozhang numericalsimulationofrockfailureprocesswitha3dgrainbasedrockmodel AT chaowang numericalsimulationofrockfailureprocesswitha3dgrainbasedrockmodel AT tuowang numericalsimulationofrockfailureprocesswitha3dgrainbasedrockmodel AT fengshouzhang numericalsimulationofrockfailureprocesswitha3dgrainbasedrockmodel AT huilingzhao numericalsimulationofrockfailureprocesswitha3dgrainbasedrockmodel |