ESTIMATION PROCEDURE FOR THE EFFECT OF TRIGGERING FACTORS ON TECHNICAL CONDITION OF LONG-TERM OPERATED UNDERGROUND STRUCTURES IN ROCK MASS
Physical processes are initiated in rock mass by long-term induced vibration loads which give rise to triggering factors the neglect of which can result in instability of underground structures. The methodical characteristics of the triggering factor monitoring are described for the specific operating conditions of an underground powerhouse hall of a hydroelectric plant in the Kola Peninsula in Russia.