FANG Ping-liang, SHAO Li-ming>, ZENG Zhi-guo, LI Ning. Study on the Stress-Strain Relationship of Gas-Bearing Coal Rock Under Variable Confining Pressure-Pore Pressure Conditions[J]. Applied Mathematics and Mechanics, 2014, 35(7): 768-776. doi: 10.3879/j.issn.1000-0887.2014.07.006
Citation: FANG Ping-liang, SHAO Li-ming>, ZENG Zhi-guo, LI Ning. Study on the Stress-Strain Relationship of Gas-Bearing Coal Rock Under Variable Confining Pressure-Pore Pressure Conditions[J]. Applied Mathematics and Mechanics, 2014, 35(7): 768-776. doi: 10.3879/j.issn.1000-0887.2014.07.006

Study on the Stress-Strain Relationship of Gas-Bearing Coal Rock Under Variable Confining Pressure-Pore Pressure Conditions

doi: 10.3879/j.issn.1000-0887.2014.07.006
Funds:  The National High-tech R&D Program of China (863 Program)(2013AA064902)
  • Received Date: 2013-12-12
  • Rev Recd Date: 2014-05-19
  • Publish Date: 2014-07-15
  • Under different confining pressure-pore pressure conditions, the numerical method was used to simulate the failure process and the stress-strain relationship of gas-bearing coal rock. A micro-heterogeneous elastic-brittle model based on elasticity theory and failure theory was constructed with the influences of confining pressure and pore pressure considered. An FEM program was developed partially out of the FEPG software, to simulate the deformation and failure behaviors of the gas-bearing coal rock under variable confining pressure-pore pressure conditions. The results show that the coal rock becomes ductile with increase of the confining pressure, and the carrying capacity is enhanced, while the influence of the pore pressure is just opposite. The simulation results quantitatively agree well with the experimental results, which, to a certain extent, proves accuracy of the proposed constitutional model and effectiveness of the FEM program.
  • loading
  • [1]
    寇绍全, 丁雁生, 陈力, 陶俊, 叶东英. 周围应力与孔隙流体对突出煤力学性质的影响[J].中国科学(A辑), 1993,23(3): 263-267.(KOU Shao-quan, DING Yan-sheng, CHEN Li, TAO Jun, YE Dong-ying. The surrounding stress and pore fluid on the mechanical properties of outburst coal [J].Science in China (Series A),1993,23(3): 263-267.(in Chinese))
    [2]
    傅雪海, 秦勇, 姜波, 王文峰. 多相介质煤岩体力学实验研究[J]. 高校地质学报, 2002,8(4): 446-452.(FU Xue-hai, QIN Yong, JIANG Bo, WANG Wen-feng. Study on mechanics experiments of multiphase medium coal rocks[J].Geological Journal of China Universities,2002,8(4): 446-452.(in Chinese))
    [3]
    陈忠辉, 谭匡烧, 杨文柱. 不同围压作用下岩石损伤破坏的数值模拟[J]. 岩土工程学报, 2001,23(5): 576-580.(CHEN Zhong-hui, TAN Kuang-shao, YANG Wen-zhu. Numerical simulation of damage and failure of rocks under different confining pressures [J].Chinese Journal of Geotechnical Engineering,2001,23(5): 576-580.(in Chinese))
    [4]
    梁正召, 唐春安, 张永彬, 马天辉. 准脆性材料的物理力学参数随机概率模型及破坏力学行为特征[J]. 岩石力学与工程学报, 2008,27(4): 718-727.(LIANG Zheng-zhao, TANG Chun-an, ZHANG Yong-bin, MA Tian-hui. On probability model of physic-mechanical parameters of quasi-brittle materials and associated mechanical failure behaviors[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(4): 718-727.(in Chinese))
    [5]
    傅宇方, 黄明利, 任凤玉, 唐春安. 不同围压条件下孔壁周边裂纹演化的数值模拟分析[J]. 岩石力学与工程学报, 2000,19(5): 577-588.(FU Yu-fang, HUANG Ming-li, REN Feng-yu, TANG Chun-an. The numerical evolution of hole wall surrounding the crack under different confining pressure simulation analysis[J].Chinese Journal of Rock Mechanics and Engineering,2000,19(5): 577-588.(in Chinese))
    [6]
    徐涛, 郝天轩, 唐春安, 杨天鸿. 含瓦斯煤岩突出过程数值模拟[J]. 中国安全科学学报, 2005,15(1): 107-110.(XU Tao, HAO Tian-xuan, TANG Chun-an, YANG Tian-hong. Numerical simulation of outburst process of gas-coal and rock[J].China Safety Science Journal,2005,15(1): 107-110.(in Chinese))
    [7]
    徐涛, 杨天鸿, 唐春安, 唐世斌. 含瓦斯煤岩破裂过程固气耦合数值模拟[J]. 东北大学学报(自然科学版), 2005,26(3): 293-296.(XU Tao, YANG Tian-hong, TANG Chun-an, TANG Shi-bin. Numerical simulation on coupled solid-gas flow in failure process of gaseous coal and rock[J].Journal of Northeastern University(Natural Science),2005,26(3): 293-296.(in Chinese))
    [8]
    Weibull W. A statistical distribution function of wide applicability[J].Journal of Applied Mechanics,1951,18: 293-297.
    [9]
    郑颖人, 沈珠江, 龚晓南. 岩土塑性力学原理[M]. 北京: 中国建筑工业出版社, 2002.(ZHENG Ying-ren, SHEN Zhu-jiang, GONG Xiao-nan.Geotechnical Plastic Mechanic s[M]. Beijing: China Architecture & Building Press, 2002.(in Chinese))
    [10]
    徐涛, 唐春安, 王述红, 张永彬. 岩石破裂过程围压效应的数值试验[J]. 中南大学学报(自然科学版), 2004,35(5): 840-844.(XU Tao, TANG Chun-an, WANG Shu-hong, ZHANG Yong-bin. Numerical tests on confining pressure effect in rock failure process [J].Journal of Central South University(Science and Technology),2004,35(5): 840-844.(in Chinese))
    [11]
    谢和平, 董毓利, 李世平. 不同围压下混凝土受压弹塑性损伤本构模型的研究[J]. 煤炭学报, 1996,21(3): 265-270.(XIE He-ping, DONG Yu-li, LI Shi-ping. Study on concrete under compression elastoplastic damage constitutive model for different confining pressure[J].Journal of China Coal Society ,1996,21(3): 265-270.(in Chinese))
    [12]
    郑哲敏, 丁雁生, 陈力. 煤与瓦斯突出的基本机理[R]. 北京: 中国科学院力学研究所, 2007.(ZHENG Zhe-min, DING Yan-sheng, CHEN Li. The basic mechanism of coal and gas outburst[R]. Beijing: Institute of Mechanics, Chinese Academy of Sciences,2007.(in Chinese))
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Article Metrics

    Article views (939) PDF downloads(733) Cited by()
    Proportional views
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return