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  1 - Investigating the potential of convergence and rock explosion and comparing via the Finite Element numerical Method
  Aref Jaberi Fooad Zamani
  on of the efficacious parameters in sketching elements is evaluating the geology dangers of underground excavations including squeezing and rock  explosions in tunnels. the water transmission system  was constructed from azad dam to degolan- ghorveh plain in o More

  on of the efficacious parameters in sketching elements is evaluating the geology dangers of underground excavations including squeezing and rock  explosions in tunnels. the water transmission system  was constructed from azad dam to degolan- ghorveh plain in order to supply water to dehgolan - ghorveh plains. The squeezing and rock e xplosion phenomena were predicted considering the weekness of rock mass of the tunnel track, the overburden thickness and its settlement in the active zone. in the present research, the tunnel was initialy divided in to 5 zones by using the results of geological and borehole drillings. The squeezing and rock explosion in these 5 zones will be discussed later. The tunnel was situated in non squeezing and extreme squeezing zone. Regarding the previous investigations and also the emorical and semi empirical metheds. The tunnel had low potentidity in the view of rock explosion. finally, the Hook and Marinos and critical strain methods were compared via the Finite Element numerical Method using phase2 software. in order to investigate the occured replacement in the tunnel. based on the previous analysis , it was realized that the critical strain method had the most similarities with the  numerical method. as for as the results of numerical and critical strain methods are matched, S3 and S5 zone can be the most unstable zones Manuscript profile