Status report on the underground machine room at the Rogun hydroelectric power plant

Quality Control of Cementation Operations Performed in Country Massif in a Test Section by Seismic Well Logging

“…The simultaneous process of setting of the cement and relaxation of the stress interferes with the normal process of setting of the cement and, therefore, after seven days V p and V s fall on average by 17 -18%. 4. Following the second cycle of consolidation cementation V p and V s both increase slightly after seven days, though in connection with the process of relaxation of the stress, V p and V s may return to their previous levels.…”

“…It should also be noted that the response of the massif to the development of the generator hall is not limited to softening processes and subsequent consolidation of the massif. Convergence of the walls of the opening occurred at the same time as the development of the hull [4], with the intensity and length of convergence differing substantially in sandstone versus aleurolite rocks (Fig. 2).…”