| 付斌,周宗红,王友新,易鑫,刘松,肖迎春.煤岩组合体破坏过程RFPA 2D 数值模拟[J].,2016,56(2):132-139 |
| 煤岩组合体破坏过程RFPA 2D 数值模拟 |
| Numerical simulation of coal-rock combination body failure process by RFPA 2D |
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| DOI：10.7511/dllgxb201602004 |
| 中文关键词: RFPA 2D 数值模拟 煤岩组合体 破裂形式 破坏强度 |
| 英文关键词: RFPA 2D numerical simulation coal-rock combination body fracture mode failure strength |
| 基金项目:国家自然科学基金资助项目(51264018，51064012). |
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| 摘要点击次数: 1359 |
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| 中文摘要: |
| 为研究不同组合条件下煤岩组合体的力学特性及破坏过程，使用RFPA2D软件，采用位移加载方式，对不同倾角、围压下的煤岩组合体进行数值模拟，研究单轴和三轴条件下不同煤岩组合体的破坏机制，分析了围压、倾角对煤岩组合体强度的影响．研究表明：单轴压缩时煤岩组合体的强度接近煤体的单轴破坏强度．三轴压缩时煤岩组合体的强度随着倾角的增大先缓慢降低后迅速降低．围压越大组合体强度越高，但强度提高值随着围压的增大降低．煤岩组合体的内摩擦角随着倾角的增大减小，内聚力随着倾角的增大均先增大后减小．组合体单轴压缩破裂情况基本相同，破坏基元主要分布于煤体中，三轴压缩时组合体的破裂出现了3种情况． |
| 英文摘要: |
| To study the dynamic properties and failure process of coal-rock combination body, the RFPA2D is used to test different coal-rock combination bodies with different inclined angles and confining pressures under deformation loading. By the tests the failure mechanisms of coal-rock combination bodies under the uniaxial compression test and the tri-axial compression test are obtained. The influence of confining pressures and inclined angles on the coal-rock combination body strength is analyzed. The study results show that the strength of coal-rock combination bodies is close to the strength of the coal under the uniaxial compression test. Under the tri-axial compression test, the strength of the coal-rock combination body decreases with the increase of inclined angles. And the strength of coal-rock combination bodies drops slowly at first and then reduces rapidly. The strength of coal-rock combination bodies increases with the higher confining pressure, but the improved strength decreases with the increase of confining pressure. The internal friction angle of coal-rock combination bodies decreases with the increase of inclined angles. The cohesion of coal-rock combination bodies increases at first and then decreases. In uniaxial compression tests the fracture is similar and the failure primitives are concentrated in the coal. In the tri-axial compression test, there are three conditions in the fracture. |
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