%0 Journal Article %T Hazards of mechanized tunnel excavation in H2S bearing ground in Aspar tunnel, Iran %A Mirmehrabi, Hossein %A Ghafoori, Mohammad %A Lashkaripour, Gholam Reza %A Tarigh Azali, Sadegh %A J. Hassanpour %J Environmental Earth Sciences %@ 1866-6280 %D 2012