ABSTRACT
A lot of cases of damage and destruction of underground structures during a strong earthquake are known. They include, for example, underground piping, mountain tunnels, stationary and metro open line tunnels of both shallow and deep shaft.There are many examples of considerable damage and strong destructions in underground structures, from piping to mines, all around the world. Underground structures seem to be stable. But this is not quite true. For example, as shown on the Figure 1, in Daikai, Japan, during earthquakes in Kobe in 1995 (Magnitude – 7.5) not only the roofs and sides of the metro station but also its columns were being destroyed laid at a epth of 50 m from the surface (Iida et al. 1996, Ishihara 1998).There occurred mass destruction in underground mines at a depth of 326 m near the town of Shurab during the Isfara-Batkent earthquake in 1977 (Middle Asia, magnitude – 6.5). (Rashidov et al. 1975).
