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An experimental study on seepage behavior of sandstone material with different gas pressures

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Abstract

The seepage evolution characteristic of brittle rock materials is very significant for the stability and safety of rock engineering. In this research, a series of conventional triaxial compression and gas seepage tests were carried out on sandstone specimens with a rock mechanics servo-controlled testing system. Based on the experimental results, the relationship between permeability and deformation is firstly analyzed in detail. The results show that the permeability–axial strain curve can be divided into the following five phases: the phase of micro-defects closure, the phase of linear elastic deformation, the phase of nonlinear deformation, the phase of post-peak stress softening and the phase of residual strength. The seepage evolution characteristic is also closely correlated with the volumetric deformation according to the relationship between permeability and volumetric strain. It is found that the gas seepage pressure has a great effect on the permeability evolution, i.e. permeability coefficients increase with increasing gas seepage pressures. Finally, the influence of gas seepage pressures on the failure behavior of brittle sandstone specimens is discussed.

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Acknowledgments

This project was supported by the National Natural Science Foundation of China (Grant 41272344), the National Basic Research Program (973) of China (Grant 2014CB046905), the Natural Science Foundation of Jiangsu Province of China (Grant BK2012568), the Team Project Funded by 2014 Jiangsu Innovation and Entrepreneurship Program, and the Fundamental Research Funds for the Central Universities (China University of Mining and Technology) (Grants 2014YC10 and 2014XT03). Outstanding Innovation Team Project in China University of Mining and Technology (Grant 2014QN002). The authors would like to express their sincere gratitude to the editor and two anonymous reviewers for their valuable comments, which have greatly improved this paper.

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Authors and Affiliations

  1. State Key Laboratory for Geomechanics and Deep Underground Engineering, School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou, 221116, China

    Sheng-Qi Yang, Yan-Hua Huang & Wei Zeng

  2. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China

    Yu-Yong Jiao

  3. School of Resource and Civil Engineering, Northeastern University, Shenyang, 110819, China

    Qing-Lei Yu

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  1. Sheng-Qi Yang
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  2. Yan-Hua Huang
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  3. Yu-Yong Jiao
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  4. Wei Zeng
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  5. Qing-Lei Yu
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Correspondence to Sheng-Qi Yang.

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Yang, SQ., Huang, YH., Jiao, YY. et al. An experimental study on seepage behavior of sandstone material with different gas pressures. Acta Mech. Sin. 31, 837–844 (2015). https://doi.org/10.1007/s10409-015-0432-7

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  • DOI: https://doi.org/10.1007/s10409-015-0432-7

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