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Experiment on the mechanism of lag water inrush from fault with time–space evolution


This paper takes the fault of the Wang Lou panel 13301 in Shandong Province, China, as the object. A three-dimensional coupled hydromechanical model was established. The lag water inrush from primary impervious fault is studied. The spatiotemporal evolution characteristics of displacement, stress, and strain field under mining disturbance are studied by model test. The multi-physical field evolution law of reaction fault activation is obtained. The corresponding finite element model is established based on the case. The evolution of fault saturation and permeability is studied by numerical simulation. The results of the two research methods were compared and verified. The lag water inrush from fault can be divided into five stages.

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C m :


D :

head height

K :


K r :

relative permeability

K s :

hydraulic conductivity

N :

unit vector along the direction of gravity

Q m :

source and sink term

S :

comprehensive compressibility

S e :

effective saturation

g :

gravitational acceleration

p :

water pressure

u :

Darcy velocity

μ :

dynamic viscosity

ρ :



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The project is sponsored by the National Natural Science Foundation of China Youth Fund (No. 51908329), the National Natural Science Foundation of China Joint Fund Project (No. U1706223), the National Natural Science Foundation of China (No. 51779133), the National Natural Science Foundation of China (No. 51879152), and the National Natural Science Foundation of Shandong Province (No. ZR2018MEE047).

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Correspondence to Rentai Liu.

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The authors declare that they have no competing interests.

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Responsible Editor: Zeynal Abiddin Erguler

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Bai, J., Tian, J., Liu, R. et al. Experiment on the mechanism of lag water inrush from fault with time–space evolution. Arab J Geosci 14, 2015 (2021).

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  • Lag water inrush from fault
  • Spatiotemporal evolution characteristics
  • The coupled hydromechanical model test
  • Numerical simulation
  • The multi-physical field