• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Conference on Energy, Environment and Sustainable Development >Real-time Observations of Fracturing Processes of Brittle Rock in Compression by X Ray Computed Tomography
【24h】

Real-time Observations of Fracturing Processes of Brittle Rock in Compression by X Ray Computed Tomography

机译：X射线计算断层扫描压缩脆性岩体压裂过程的实时观察

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In present, a series of uniaxial compressive experiments on sandstone samples have been conducted in the laboratory by using jointed devices of triaxial loading equipment and medical SOMTOM-plus CT scanner. Based on CT value, expression of density damage variables and density damage increments (DDI) of brittle rock and the method to determine the rock initial damage variables have been worked out. From real-time CT observations of sandstone sample under uniaxial compression condition and the analysis on CT digital images and the relation curve between sandstone density damage increment (DDI)and stress, the evolution process of fracturing in brittle rock sample can be divided into five stages, i.e. initial densification stage, crack occurrence-propagation, crack merging-bifurcation, crack rebifurcation-propagation, and crack cut-through-massive failure stage. Crack occurrence-propagation is a local phenomenon and the whole rock is still in the densification stage. Therefore, the rock failure process under compression is mainly including three stages, namely initial damage densification, local dilatation-bulk dilatation, and massive failure. The use of CT images and relation curve between density damage increment and stress in analyzing the meso-damage evolution processes of brittle rock sample is an important and effective method. As an important mechanics index in rock meso-mechanics, the density damage increment can be used to analyze the quantitative fracturing process in brittle rock under compressive condition, as well as being an important factor in a rock fracturing process model to be constructed.
机译：在目前，通过使用三轴装载设备和Medical Somtom-Plus CT扫描仪的连接装置，在实验室进行了一系列关于砂岩样品的单轴压缩实验。基于CT值，脆性岩体的浓度损伤变量和密度损伤增量（DDI）的表达以及确定岩石初始损伤变量的方法已经解决了。从实时CT观察单轴压缩条件下的砂岩样品和CT数字图像分析和砂岩密度损伤增量（DDI）与应力之间的关系曲线，脆性岩石样品中压裂的演化过程可分为五个阶段，即初始致密化阶段，裂纹发生 - 繁殖，裂缝合并 - 分叉，破裂重新凝固 - 传播和裂缝切割型失效阶段。裂缝发生 - 传播是局部现象，整个岩石仍在致密化阶段。因此，压缩下的岩石破坏过程主要包括三个阶段，即初始损伤致密化，局部扩张 - 散装扩张和大规模故障。密度损伤增量和应力之间的CT图像和关系曲线在分析脆性岩样的中间损伤进化过程中的一种重要且有效的方法。作为岩石中型力学中的重要力学指数，密度损伤增量可用于在压缩条件下分析脆性岩石中的定量压裂过程，以及构建岩石压裂过程模型的重要因素。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号