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Research Article

Testing Research on the Effect of Effective Stress on Coal Specimen

Peide Sun
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To have better understanding of the interaction mechanism for rock deformation and methane gas flow, the testing research on the effect of the effective stress on coal specimen under the action of 3-dimensional compression have been specially designed for this study. The triaxial compression tests to coal specimen containing methane gas are carried out with various confining stress and pore pressures. The result of this test showed that the empirical equations for effective stress coefficient are a bilinear function of variable with overall stress and pore pressure. The empiric equations can depict the dynamic deformation behavior of gassy coal under the action of pore pressure.

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  How to cite this article:

Peide Sun , 2006. Testing Research on the Effect of Effective Stress on Coal Specimen . Journal of Applied Sciences, 6: 2635-2640.

DOI: 10.3923/jas.2006.2635.2640


1:  Bear, J., 1972. Dynamics of Fluids in Porous Media. 1st Edn., American Elsvier Publishing Company Inc., New York, USA., ISBN-10: 044400114X, pp: 764.

2:  Borisenko, A.A., 1985. Effect of gas pressure on stress in coal strata. Soviet Min. Sci., 21: 88-92.
CrossRef  |  Direct Link  |  

3:  Ettinger, A.L., 1979. Swelling stress in the gas-coal system as an energy source in the development of gas bursts. Soviet Min. Sci., 15: 494-501.
CrossRef  |  Direct Link  |  

4:  Jaeger, J.C. and N.G.W. Cook, 1979. Fundamentals of Rock Mechanics. 3rd Edn., Chapman and Hall, London.

5:  Sun, P.D., 1998. A study on the interaction mechanics for coal seam deformation and gas leak flow and its numerical simulations. Ph.D. Thesis, University of Chongqing.

6:  Sun, P.D. and X.F. Xian, 1998. Solid-gas coupled analysis for safety range of upper protective layer mining. Chinese J. Rock Mech. Eng., 17: 932-936.

7:  Sun, P.D. and X.F. Xian, 1999. A study on coupled models for coal seam deformation, gas leak flow and its applications. J. China Coal Soc., 24: 60-64.

8:  Sun, P.D., 2000. Interaction modeling for mining safety range and numerical simulations. J. Coal Sci. Eng., 6: 41-46.

9:  Sun, P.D., 2002. Sun Model and its Applications. Zhejiang University Press, Hangzhou.

10:  Sun, P.D., 2002. SIP analysis on coupled models for coal seam deformation and gas leakage flow. J. China Coal Soc., 27: 276-280.

11:  Sun, P.D., 2002. Mathematical modeling for coupled solid elastic deformation and gas leak flow in multi-coal-seams. J. Coal Sci. Eng., 8: 65-71.

12:  Sun, P.D., 2003. Research on visual simulation of coupled solid deformation and gas leak flow in parallel coal seams. Proceedings of the 10th ISRM Congress on Technology Roadmap for Rock Mechanics, (CTRRM'2003), South African Institute of Mining and Metallurgy, pp: 1171-1174.

13:  Sun, P.D. and H.G. Wan, 2004. A coupled model for solid deformation and gas leak flow. Int. J. Numerical Anal. Methods Geomechanics, 28: 1083-1104.
Direct Link  |  

14:  Sun, P.D., 2004. Numerical simulations for coupled rock deformation and gas leak flow in parallel coal seams. Geotech. Geol. Eng., 22: 1-17.
CrossRef  |  Direct Link  |  

15:  Sun, P.D., 2004. A numerical approach for coupled gas leak flow and coal/rock deformation in parallel coal seams. Int. J. Rock Mech. Min. Sci., 41: 441-446.
CrossRef  |  Direct Link  |  

16:  Sun, P.D., 2005. Advances in Coupled Modeling in Geomechanics. China Environmental Science Press, Beijing.

17:  Sun, P.D. and M.X. Guo, 2005. A new numerical approach of coupled modeling for solid deformation and gas leak flow in multi-coal-seams. J. Coal Sci. Eng., 11: 36-39.

18:  Terzaghi, K., 1943. Theoretical Soil Mechanics. John Willy and Sons Inc., New York.

19:  Valliappan, S. and W.H. Zhang, 1999. Role of gas energy during coal outbursts. Int. J. Numerical Methods Eng., 44: 875-895.
Direct Link  |  

20:  Walsh, J.B., 1981. Effect of pore pressure and confining pressure on fracture permeability. Int. J. Rock Mech. Min. Sci. Geomech. Abst., 18: 429-439.

21:  Xie, X.J., 1993. Research on theory of damage creep of rock and coal mass and applied in numerical simulations of engineering. Ph.D. Thesis, University of Chongqing.

22:  Zhao, C.B., T.P. Xu and S. Valliappan, 1994. Numerical modeling of mass transport problems in porous media: A review. Comput. Struct., 53: 849-860.
Direct Link  |  

23:  Zhao, Y.S., Z.M. Jin and J. Sun, 1994. Mathematical model for coupled solid deformation and methane flow in coal seams. Applied Math. Modell., 18: 328-333.
CrossRef  |  Direct Link  |  

24:  Zhao, Y.S., 1994. Rock Fluid Mechanics in Mine. China Coal Industry Publishing House, Beijing, China.

25:  Zhao, Y.S. and Y.Q. Hu, 1995. Experimental study of the law of effective stress by methane pressure. Chinese J. Geotech. Eng., 17: 26-31.

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