Analysis of time-dependent deformation measured at deep underground openings

摘要: The understanding of time-dependent deformation rock around underground excavations becomes more and important with the increase in overburden stress, opening size, temperature expected deep facilities for various purposes. It is desirable to use situ measurements instead laboratory data, because difference mechanisms observed measurement. In this study, from Waste Isolation Pilot Plant, which a radioactive waste repository salt mine, yield pillar mining design was adopted, were extensively analyzed. possible determine that transition time primary secondary creep stages 200–300 days. influence adjacent excavation on measurement could be clearly observed. also found measuring interval understand mechanisms.