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Non-linear Shear Strength Model for Coal Rocks

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Abbreviations

c (MPa):

Cohesion

ϕ (°):

Angle of friction

σ 1 (MPa):

The maximum principal stress

σ 3 (MPa):

The minimum principal stress or confining stress

σ 3max (MPa):

Maximum confining stress

σ ci (MPa):

Uniaxial compressive strength (UCS)

σ ci_fitted (MPa):

Fitted UCS

a :

Fitting parameter

b :

Fitting parameter

m :

Fitting parameter

n :

Fitting parameter

k :

Intermediate auxiliary parameter

AAREP:

Absolute average relative error percentage

N :

Number of tests

RE:

Relative error

R 2 :

Correlation coefficient

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Acknowledgements

This research has been funded by the National Natural Science Foundation of China (nos. 51504218 and 11372363). The authors would like to express their gratitude to anonymous reviewers for their constructive comments on the paper.

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Authors and Affiliations

  1. Institute of Port, Coastal and Offshore Engineering, Zhejiang University, Hangzhou, 310015, China

    Jiayi Shen

  2. State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, China

    Ling Wan

  3. Chongqing Key Laboratory of Heterogeneous Material Mechanics, Chongqing University, Chongqing, 400044, China

    Ling Wan

  4. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing, 100083, China

    Jianping Zuo

  5. Institute of Rock Mechanics and Fractals, School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing, 100083, China

    Jianping Zuo

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  1. Jiayi Shen
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  2. Ling Wan
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  3. Jianping Zuo
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Correspondence to Ling Wan.

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Shen, J., Wan, L. & Zuo, J. Non-linear Shear Strength Model for Coal Rocks. Rock Mech Rock Eng 52, 4123–4132 (2019). https://doi.org/10.1007/s00603-019-01775-y

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