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An experimental investigation on acoustic emission characteristics of sandstone rockburst with different moisture contents

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Abstract

Rockburst occurred frequently during deep mining in China. The mechanism of rockburst is very complicated and related to many factors. In order to investigate the influence of moisture contents of rockmass on rockburst, we conducted a series of laboratory rockburst experiments of sandstone under three different moisture contents by the Modified True-Triaxial Apparatus (MTTA), in which the acoustic emission (AE) system was employed to monitor the internal damage of rock mass. A high-speed video camera was utilized to record the detail of rockburst. Based on the experimental results, the AE characteristics, such as AE count, AE energy, and AE frequency, were analyzed. The rockburst process, type, and indensity under different moisture contents were discussed. The research results show that with the increase of moisture contents, rock strength was soften, the elastic and the cumulative damage of the rock were reduced, resulting in a gradual decrease in AE cumulative counts and cumulative energy over the course of rockburst. This study provides an experimental basis and reference for better understanding to the rockburst mechanism and control.

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Authors and Affiliations

  1. State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, China University of Mining & Technology, Beijing, 10083, China

    XiaoMing Sun, HuiChen Xu, ManChao He & WeiLi Gong

  2. School of Mechanics and Civil Engineering, China University of Mining & Technology, Beijing, 10083, China

    HuiChen Xu

  3. Energy Geosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA

    LianGe Zheng

Authors
  1. XiaoMing Sun
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  2. HuiChen Xu
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  3. LianGe Zheng
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  4. ManChao He
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  5. WeiLi Gong
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Correspondence to XiaoMing Sun.

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Sun, X., Xu, H., Zheng, L. et al. An experimental investigation on acoustic emission characteristics of sandstone rockburst with different moisture contents. Sci. China Technol. Sci. 59, 1549–1558 (2016). https://doi.org/10.1007/s11431-016-0181-8

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  • DOI: https://doi.org/10.1007/s11431-016-0181-8

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