Deterministic Method of Floor Rock Permeability Tensor of Mining over Confined Water and Application in Numerical Simulation

Abstract:

Based on equivalent continuum media theory of fractured rock mass, the author got the permeability tensor of floor strata in some mine according to core logging method, drilling imaging method and boring water injection method, and determined the floor rock permeability tensor using correction method. The author simulated the floor inrush problem by coupling fluid-solid theory and anisotropic flow model with FLAC3D software. The result shows that, the destroyed depth of floor and the confined water rising height are all slight when the coal mining workface is 150m apart from the fault, but they increase obviously when the coal mining workface is 30m apart from the fault, and are extremely easy to get through and casue water inrush through fault.

• Periodical: Applied Mechanics and Materials (Volumes 204-208)
• Pages: 4840-4844
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.204-208.4840
• Online since: October 2012
• Authors: Wei Tao Liu, Jian Jun Shen, Yun Juan Liu
• Keywords: Anisotropic Seepage Model, Equivalent Continuum Seepage Model, Numerical Simulation, Permeability Tensor

References

[1] Weijia Guo, Weitao Liu, Special coal mining, Coal industry press, Beijing, 2008. (In Chinese)

[2] Yanqing Wu, Daoyuan Zhang,Introduction of rock mass hydraulics,Southwest jiaotong university press, Chengdu, 1995. (In Chinese)

[3] Weitao Liu,Research on mechanism of lag water bursting of through coal floor fracture and numerical simulation,China University of Mining and Technology, Beijing, 2005. (In Chinese)

[4] Itasca Consulting Group,Inc..Fast Languagian Analysis of continua in 3 dimensions,version 3.0,user'mannual,Intsca Consulting Group ,Inc, 2005.

[5] Weitao Liu,Qiang Wu, Numerical simulations of water inrush of fault F0 in fangezhuang coal mine,Chinese Journal of Rock Mechanics and Engineering,27(2008).pp.3604-3610(In Chinese)