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Rock burst criterion based on clay mineral content

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Abstract

This study aims to establish a criterion for rock burst based on clay mineral content (CMC). A classification system for rock burst intensity is proposed based on the results of 124 laboratory tests. A CMC-based criterion for the probability and intensity of a rock burst is subsequently developed through a statistical analysis of the experimental results. Rock burst in laboratory tests can be classified as not occurring, weak, moderate, or strong according to sound, associated phenomena, fragment shape, and failure modes. When the CMC ≤ 10%, the probability of a rock burst is high, and the rock burst intensity is from moderate to strong. If 10% < CMC ≤ 30%, the probability becomes moderate and the dominant intensity is from weak to moderate. If CMC > 30%, the probability of a rock burst is low. This rock burst criterion is used to evaluate the probability of rock burst at the Yaoqiao and Kongzhuang coal mines, China to demonstrate the feasibility of this criterion.

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Abbreviations

CMC:

Clay mineral content

UCS:

Uniaxial compressive strength

σ H, σ v, σ h :

Original maximum, intermediate, and minimum principal stresses, respectively

σ 1, σ 2, σ 3 :

Maximum, intermediate, and minimum principal stresses, respectively

σ 1max :

Maximum principal stress during failure

H :

Mining depth

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Funding

Financial support from the National Key Research and Development Program (Grant No. 2016YFC0600901) and National Natural Science Foundation of China (Grant No. 51704298) is gratefully acknowledged.

Author information

Correspondence to Fuqiang Ren.

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Conflict of interest

The authors declared that they have no conflicts of interest.

Additional information

Responsible Editor: Zeynal Abiddin Erguler

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Cite this article

He, M., Li, J. & Ren, F. Rock burst criterion based on clay mineral content. Arab J Geosci 13, 185 (2020). https://doi.org/10.1007/s12517-020-5199-x

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Keywords

  • Rock burst criterion
  • Clay mineral
  • Laboratory test
  • Field cases
  • Intensity