Damage Evolution of Rocks under Triaxial Compressions: An NMR Investigation

被引:28
作者
Yang, Xiangru [1 ]
Weng, Lei [2 ]
Hu, Zhenxiang [1 ]
机构
[1] Cent S Univ, Sch Resources & Safety Engn, Changsha 410083, Hunan, Peoples R China
[2] Wuhan Univ, Sch Civil Engn, Wuhan 430072, Hubei, Peoples R China
基金
中国国家自然科学基金;
关键词
Nuclear Magnetic Resonance (NMR); T2; distribution; porosity; triaxial compression; damage evolution; rock mechanics; NUCLEAR-MAGNETIC-RESONANCE; MECHANICAL-PROPERTIES; DEFORMATION; SANDSTONE; TESTS; METHODOLOGY; STABILITY; CRITERION; LIMESTONE; PRESSURE;
D O I
10.1007/s12205-017-0766-8
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
To investigate the damage characteristics of rocks subjected to triaxial compression, marble specimens were prepared and subjected to varying levels of axial compressions with identical confining of 20 MPa. The loaded specimens were then tested using Nuclear Magnetic Resonance (NMR) technique to obtain their micro NMR parameters. The changes in transverse surface relaxation time (T-2) distribution, peak area, porosity and microcracks structure distribution of the specimens due to varying compression ratios were systematically analysed. It is found that with the increase of the axial compression, the size and the number of the microcracks, porosity and the peak area increase, indicating that severer damage is induced at high compression ratio. The proportion of the large microcracks area to the total T-2 area exceeds 96% in spite of the increase in compression ratio, indicating that the large microcracks dominate the degradation of the specimen. Based on the Magnetic Resonance (MR) images, the variation of the microcracks distribution can be visually presented under the different compression loadings. The NMR method presented in this study shows a good way of identifying meso-damage evolution characteristics of rock.
引用
收藏
页码:2856 / 2863
页数:8
相关论文
共 41 条
  • [1] Petrophysical and rock-mechanics effects of CO2 injection for enhanced oil recovery: Experimental study on chalk from South Arne field, North Sea
    Alam, M. Monzurul
    Hjuler, Morten Leth
    Christensen, Helle Foged
    Fabricius, Ida Lykke
    [J]. JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING, 2014, 122 : 468 - 487
  • [2] Characterization and Analysis of Porosity and Pore Structures
    Anovitz, Lawrence M.
    Cole, David R.
    [J]. PORE-SCALE GEOCHEMICAL PROCESSES, 2015, 80 : 61 - +
  • [3] A multi-technique approach for the determination of the porous structure of building stone
    Barbera, Giovanni
    Barone, Germana
    Crupi, Vincenza
    Longo, Francesca
    Maisano, Giacomo
    Majolino, Domenico
    Mazzoleni, Paolo
    Raneri, Simona
    Teixeira, Jose
    Venuti, Valentina
    [J]. EUROPEAN JOURNAL OF MINERALOGY, 2014, 26 (01) : 189 - 198
  • [4] Porosity and microstructure characterization of building stones and concretes
    Cnudde, V.
    Cwirzen, A.
    Masschaele, B.
    Jacobs, P. J. S.
    [J]. ENGINEERING GEOLOGY, 2009, 103 (3-4) : 76 - 83
  • [5] Coates G.R., 1999, NMR Logging Principles and Applications
  • [6] Fracture capture of organic pores in shales
    Daigle, Hugh
    Hayman, Nicholas W.
    Kelly, Eric D.
    Milliken, Kitty L.
    Jiang, Han
    [J]. GEOPHYSICAL RESEARCH LETTERS, 2017, 44 (05) : 2167 - 2176
  • [7] Impact of excavation damage on the thermo-hydro-mechanical properties of natural Boom Clay
    Dao, Linh-Quyen
    Cui, Yu-Jun
    Tang, Anh-Minh
    Pereira, Jean-Michel
    Li, Xiang-Ling
    Sillen, Xavier
    [J]. ENGINEERING GEOLOGY, 2015, 195 : 196 - 205
  • [8] Dunn K.J., 2002, NUCL MAGNETIC RESONA, V32
  • [9] A new experimental methodology to investigate formation damage in clay-bearing reservoirs
    Fang, Wenchao
    Jiang, Hanqiao
    Li, Jie
    Li, Wei
    Li, Junjian
    Zhao, Lin
    Feng, Xiaonan
    [J]. JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING, 2016, 143 : 226 - 234
  • [10] Real-time computerized tomography (CT) experiments on sandstone damage evolution during triaxial compression with chemical corrosion
    Feng, XT
    Chen, SL
    Zhou, H
    [J]. INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 2004, 41 (02) : 181 - 192