... Characterization concrete liner portal phyllite slope movement siphon leakage Acknowledgement tunnel extensometer Survey Point lining construction Belden Tunnel Upstream Oil & Gas tunnel 2 operation Canyon geologic mapping deformation ARMA 11-218 Toppling-induced Cracking in the Lining...

... ABSTRACT: Subsidence above two active longwall mines located in Utah, Deer Creek and Dugout Canyon, was monitored using differential interferometric synthetic aperture radar. Time-lapsed images acquired over a period of 46, 92, and 132 days by the ALOS PALSAR sensor were used to locate areas...

... ABSTRACT: An engineering geological evaluation of a steep-sided, narrow canyon along Big Chico Creek was performed for input to a planned fish ladder repair and construction project. The primary geologic constraint involves potential rock falls from the canyon wall above the ladder. Based...

... excavation was performed by blasting benches from the top down with concurrent installation of rock reinforcement. SETTING Clear Creek Canyon is situated on the western side of the Denver metropolitan area. Highway 6, which runs through the canyon, is a major thoroughfare providing access to the high...

... ABSTRACT : Results of analytical and numerical modeling of the stress state of rocks around tunnels designed for Pamir and Kokomeren hydropower stations are presented. New analytical method was developed to take into account geometry of both canyon and tunnel to locate the optimum site...

... SUMMARY An unusual road has been designed and constructed in rugged topographic conditions of a deep canyon with vertical or subvertical sides. The road requires rock cuts up to 300 feet high which were excavated in competent sedimentary rocks which have three distinct sets of dividing planes...