东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (7): 1034-1039.DOI: 10.12068/j.issn.1005-3026.2016.07.026

• 资源与土木工程 • 上一篇    下一篇

剪切荷载作用下砂岩断裂面粗糙度三维统计分析

许江1,2， 刘义鑫1,2， 谭虎1,2， 张海龙1,3   

  1. (1. 重庆大学 煤矿灾害动力学与控制国家重点实验室， 重庆400044； 2. 重庆大学 复杂煤气层瓦斯抽采国家地方联合工程实验室， 重庆400044; 3. 重庆文理学院 建筑工程学院， 重庆402160)
  • 收稿日期:2015-04-21 修回日期:2015-04-21 出版日期:2016-07-15 发布日期:2016-07-13
  • 通讯作者: 许江
  • 作者简介:许江(1960-)，男，湖南永兴人，重庆大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51474040)； 国家自然科学基金青年基金资助项目(51304255)； 重庆市基础与前沿研究一般项目(cstc2014jcyjA0994).

Three Dimensional Statistical Analysis of Fracture Roughness of Sandstone Under Shear Loading

XU Jiang1,2， LIU Yi-xin1,2， TAN Hu1,2， ZHANG Hai-long1,2   

  1. 1. State Key Laboratory of Coal Mine Disaster Dynamics and Control， Chongqing University， Chongqing 400044， China； 2. State and Local Joint Engineering Laboratory of Methane Drainage in Complex Coal Gas Seam， Chongqing University， Chongqing 400044， China； 3. Faculty of Architecture Engineering， Chongqing University of Arts and Sciences， Chongqing 402160， China.
  • Received:2015-04-21 Revised:2015-04-21 Online:2016-07-15 Published:2016-07-13
  • Contact: LIU Yi-xin
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摘要： 利用自主研发煤岩剪切-渗流耦合实验装置与三维立体扫描仪对剪切荷载作用下砂岩断裂面粗糙度三维统计信息进行了实验研究，从其断裂面扫描直观图、断裂面等高线分布图、断裂面剖面轮廓线等方面探讨了剪切荷载作用下砂岩断裂面三维粗糙度分布特性.结果表明:砂岩在剪切荷载作用下发生断裂破坏时，其变形特性曲线变化趋势一致，断裂面直观特征存在个体差异，但断裂面粗糙高度分布均近似于正态分布；沿剪切方向与垂直于剪切方向剖面轮廓线特征不同，不能反映断裂面整体特征；分析了粗糙度参数JRC，R○L与R○S之间关系，JRC值与R○L值之间呈近似线性关系，R○S值与JRC平均值线性拟合度相对于JRC与R○L值线性拟合度更好，JRC平均值更能反映断裂面整体三维特征.

关键词: 剪切荷载, 断裂面, 粗糙度, 三维, 砂岩

Abstract: The characteristics of fracture roughness of sandstone under shear loading were specifically discussed through the fracture surface scanning visual map， contour map of the distribution of the fracture surface and the fracture surface profile contour， according to the 3D information of fracture roughness of sandstone under shear loading collected by self-developed coal or rock shear-flow coupling test device and 3D scanners. It is showed that the deformation characteristic curves generally were in good agreement， the visual features of fracture surface were different from each other， and the distribution of roughness heights was appromiately accorded with normal distribution. Characteristics of profile along the shear direction and perpendicular to the shear direction are different， and cannot reflect the whole fracture surface features. The analysis of roughness parameters relationship among R○L， R○S and JRC suggests that there was a linear correlation between JRC and R○L， and the linearity of R○S and the average value of JRC was better than that of JRC and R○L. So the average value of JRC is more suitable to reflect the 3D characteristics of fracture surface.

Key words: shear load, fracture surface, roughness, 3D;sandstone

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