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The Effect of Seismic Coefficients Direction on the Axial Force of Rock Bolts in Flat Ground

Journal Name:

  • International Journal of Science and Engineering Investigations

Publication Year:

  • 2016

Key Words:

Author NameUniversity of Author
Abstract (2. Language): 
In this study, through Pseudo-static analysis with the help of finite element modeling software phase2, effect direction of seismic coefficients on axial force of rock bolts mounted in circular tunnels and it changes in different conditions evaluated. The circular tunnels are modeled with diameter of 8 meters and in depths of 10, 25 and 35 meters in the Shale rocks. The tunnels are supported by end anchored rock bolts with length of 3 meters and spacing of 2 meters. The ground surface is flat and the earthquake magnitudes of 6.5, 7, 7.5 and 8 on the Richter scale considered in tunnels modeling. The axial force of rock bolts is measured for each of depth and magnitudes of earthquake. The results of the evaluations show that with increasing the depth of tunnel and the earthquake magnitude, the axial force of rock bolts and it variations has increased. Because in this situation, the total displacement around tunnels has been increased. Moreover, in flat surfaces, the alignment of vertical acceleration of seismic coefficient with gravitational force direction had resulted in the highest axial force of rock bolts and the direction of horizontal seismic coefficient do not make any drastic change in rock bolts’ axial force values.
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REFERENCES

References: 

[1] W.J. G le, C. M rk, D.C. Oyler, nd J. C en, “Co puter Si ul tion of Ground Be vior nd Rock Bolt Inter ction t E er ld Mine 2004”. Proc. 23rd Intl. Conf. on Ground Control in Mining, Morgantown, WV, Morgantown, WV: West Virginia University, 27-34, 2004.
[2] .C. lic e, “Rock slope st bility. Society for Minin Met llur y”. USA, 1999.
[3] D.C. Wyllie, nd C.W. M , “Rock slope en ineerin ”, Fourt edition. London, Spon Press, 2004.
[4] T. R urt y, “En ineerin in rocks for slopes, found tion nd tunnels”, Prentice H ll of Indi Priv te Li ited, New Del i, Indi , 2007.
[5] E. Hoek, nd D.F. Wood, “Rock Support”, Minin M zine, 159, 4, 282-287, 1988.
[6] T. Sol k, “Ground be vior ev lu tion for tunnels in blocky rock sses”, Tunnelin nd Under round Sp ce Technology, 24, 323-330, 2009.
International Journal of Science and Engineering Investigations, Volume 5, Issue 57, October 2016 13
www.IJSEI.com Paper ID: 55716-02
ISSN: 2251-8843
[7] . ovári, “Tunnelin in Squeezin Rock”, Tunnel, 5, 98, 12-31, 1998.
[8] E. Hoek, C. Carranza-Torres, nd B. Corku , “Hoek–Brown Failure Criterion-2002 Edition”. Rocscience, 2002.
[9] Rocscience, “ 2D finite ele ent pro r for c lculating stresses and esti tin support round t e under round e c v tions”. Geo ec nics Software and Research. Rocscience Inc., Toronto, Ontario, Canada, 1999.
[10] ., yni , “Person l co unic tion”, 2011.
[11] R., Baker, R., Shukha, V., Operstein, S., Frydman, “St bility c rts for pseudo-st tic slope st bility n lysis”, Soil Dyn ics nd E rt qu ke Engineering, 26, 9, 813-823, 2006.
[12] Y.M. ., H s s , D., P rk, “Non-linear one-dimensional seismic round otion prop tion in t e Mississippi E b y ent”, En ineering Geology Division, 62, 1-3, 185-206, 2001.

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