Study on failure behavior of fluid-solid coupling under conventional triaxial compression for Maokou limestone

被引：0
|
作者：
Zhao Y. [1 ,2 ]
Tang J. [1 ]
Wang W. [1 ]
Cheng G. [3 ]
Luo S. [1 ]
Fu C. [1 ]
机构：
[1] Hunan Provincial Key Laboratory of Safe Mining Techniques of Coal Mines, Work Safety Key Laboratory on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines, Hunan University of Science and Technology, Xiangtan, 411201, Hunan
[2] State Key Laboratory of Coal Resources and Safety Mining, China University of Mining & Technology, Xuzhou, 221116, Jiangsu
[3] China Geological Survey, Beijing
来源：
| 2018年 / China University of Mining and Technology卷 / 35期
关键词：
Complete stress-strain; Fluid-solid coupling; Rock mechanics; Seepage;
D O I：
10.13545/j.cnki.jmse.2018.01.028
中图分类号：
学科分类号：
摘要：
The permeability of Maokou limestone under the conventional triaxial compression condition is measured by MTS815 rock mechanics testing machine, using the transient method. The complete stress-strain and water differential pressure ΔP curves of Maokou limestone under different confining and hydraulic pressures are captured. According to the experimental curves, the seepage, strength and failure characteristics under the complete stress-strain process are studied. Experimental results show that the water differential pressure ΔP under complete stress-strain process is characterized as four stag es: stage I of the initial descent, stage II of slowly changing, stage III of non-steady descent and stage IV of sharply descent. These four stages reflect that the rock permeability decreased firstly, then increased, and sharply increased at peak strength point during the complete stress-strain process. The influence of confining pressure and pore water pressure on the peak strength and deformation characteristics of the rock are studied. The peak strength and elastic modulus increase. However, the Poisson's ratio tends to decrease with the effective confining pressure. The effect of pore water pressure on peak strength, elastic modulus and Poisson's ratio is opposite to that of confining pressure. © 2018, Editorial Board of Journal of Mining & Safety Engineering. All right reserved.
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页码：205 / 212
页数：7
相关论文
共 21 条
  • [1] Snow D.T., Anisotropies permeability of fractured media, Water Resources Research, 5, 6, pp. 1273-1289, (1969)
  • [2] Louis C., Rock Hydraulics, pp. 87-300, (1974)
  • [3] Jones F.O., A laboratory study of the effects of confining pressure on fracture flow and storage capacity in carbonate rocks, Journal of Petroleum Technology, 21, 1, pp. 21-27, (1975)
  • [4] Wang X., Rong G., Zhou C., Permeability experimental study of gritstone in deformation and failure processes, Chinese Journal of Rock Mechanics and Engineering, 31, pp. 2940-2947, (2012)
  • [5] Zhu Z., Zhang A., Xu W., Experimental research on complete stress-strain process seepage characteristics of brittle rock, Rock and Soil Mechanics, 23, 5, (2002)
  • [6] Jiang C., Sun Q., Jiang Z., Et al., Permeability catastrophe of brittle rock during complete stress-strain path, Journal of Central South University (Science and Technology), 43, 2, pp. 688-693, (2012)
  • [7] Peng S., Qu H., Luo L., Et al., An experimental study on the penetrability of sedimentary rock during the complete stress-strain path, Journal of China Coal Society, 25, 2, pp. 113-116, (2000)
  • [8] Zhang S., Shen C., Deng J., Testing study on the law of permeability variation in process of rock deformation and damage, Chinese Journal of Rock Mechanics and Engineering, 19, pp. 885-888, (2000)
  • [9] Jiang Z., Ji L., The laboratory study on behavior of permeability of rock along the complete stress-strain path, Chinese Journal of Geotechnical Engineering, 23, 2, pp. 153-156, (2001)
  • [10] Lu P., Shen Z., Zhu G., Et al., Characterization of and experimental study on the permeability of rock-samples during complete stress-strain course, Journal of University of Science and Technology of China, 32, 6, pp. 45-51, (2002)
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