Owing to aerobic tank overtopping dam resulting in dam break

the drainage-seepage ditch on Zishan dam and non-sandy concrete surface of its ash-ward slope were partly damaged

that resulted in drainage amount was increased and ash was leaked sometimes on the exit of the drainage-seepage ditch and the cone of leak ash and water was formed on the inlet

a lot of cracks appeared in the beginning at the non-sandy concrete surface (rigid body) and in the sequel at the ash-ward slope surface (flexible body). The cause of formation of crack should be due to landslide. On the precondition of carrying out measures of saving and protecting the dam and choosing preventing and curing project

the feasible tests of filling grouting were done. The cracks were dealt with using the grouting. Then the dam had been gone through the very strong rainstorm in the current year. As yet

the dam was running normal. The results of grouting were better.