... configuration full-scale load-deflection test applied load upstream oil & gas australia government geological subdiscipline support system shotcrete adhesion strength coefficient reservoir geomechanics evaluation design method shotcrete rock load bernard shotcrete performance ARMA 23 553...

... for some time that the USA practices of supporting tunnels with heavy steel ribs have been overly conservative. The USA practice is based on rock load coefficients by Karl Terzaghi. In 1946, Karl Terzaghi published a tunnel rock classification system (Terzaghi, 1946), with the rock loads on tunnels...

... construction procedures that will result in the tunnel as designed. In the Americas tunnel design almost exclusively follows the concept by TERZAGHI (1946), in which he empirically related nine rock conditions with quantitatively defined rock loads, assuming conventional tunneling procedures. Several...

... ABSTRACT Y The influence of geologic logs of drill holes on tunnel projects is considerable. Based on the geological logs, the rock is classified and engineers then use formulas by Terzaghi, Deere, Wickham, Barton, or others as a means of obtaining a "rock load" on the tunnel. For this paper...

..., of the engineering factors dictated by economic and technical considerations, and of ore production practices. Combining these factors, a rational underground support system of rock reinforcement, light steel channel section or welded wire fabric, and shotcrete can be designed based on rock fracturing, rock load...