FINE TEST ON PROGRESSIVE FRACTURING PROCESS OF MULTI-CRACK ROCK SAMPLES UNDER UNIAXIAL COMPRESSION
FINE TEST ON PROGRESSIVE FRACTURING PROCESS OF MULTI-CRACK ROCK SAMPLES UNDER UNIAXIAL COMPRESSION
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发表时间：
2010
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通讯作者：
W. Xiang
中科院分区：
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作者：
W. Xiang
综合利用声发射定位技术和CT技术的灵敏度特性，实现了单轴压缩下节理岩体渐进破裂过程的精细试验。通过分析裂纹扩展过程中声发射事件的发生位置、CT滑移以及CT数的变化，得到裂纹扩展过程。在加载初期，虽然整个节理岩样都表现出裂纹的压实，但初始裂纹的扩展可以局限在局部区域。随着载荷的增加，裂纹两侧逐渐扩展，并逐渐破坏，最终形成断裂面。研究结果为探索岩石的微观损伤机理和裂纹扩展规律奠定了基础，也将推动岩石力学试验可视化技术的发展。
By using integrally the sensitivity features of acoustic emission location technology and the computerized tomography(CT) technology,the fine test on progressive fracturing process of jointed rock under uniaxial compression is realized. By analyzing the positions of acoustic emission events,the CT slides and the change of CT number,the cracking propagation process is achieved. At the beginning of loading,although the whole jointed rock sample shows of crack compaction,the initial crack extension can be localized in the partial area. With the load increasing,both sides of the cracks extend gradually,and they will be destroyed progressively until to form a fracture plane finally. The results can lay the foundation for exploring micro-damage mechanism and the crack expansion discipline of rock,and it will also promote the development of visualization technology for rock mechanics test.