... Upstream Oil & Gas RME metals & mining TBM shale asturia Reservoir Characterization methane tunnel face emiliano formation oviedo Pajare tunnel emission excavation tunnel Excavability structural geology injection correlation instability Bieniawski north portal Rock...

... Fluid Dynamics coal effective stress low rank coal carbon dioxide specimen kPa higher pressure Upstream Oil & Gas flow in porous media permeability sample methane gas pressure change reduction MPa gas pressure permeability relationship gas pressure shrinkage permeability...

.... For several tunnels typical hazards are explosive gas invasion, like methane. In this paper the development of a risk classification is described, using Favourability Functions, to create maps with different risk classes regarding the possibility of gas invasion during the excavation of a tunnel...