Numerical simulation analysis on stability of vertically arranged underground chambers under dynamic load;

The rock mass fracture is considerably developed in underground caverns of Huanggou Pumped Storage Station,so it is significant for engineering construction to predefine whether there are unstable blocks on excavation planes of underground caverns.

For security reasons, it’s not allowed to delay the study about chambers system in deep well.

In order to study the effect of stability on roadway layout of deep soft rock pump house chambers,we analyzed the characteristics and reasons of the chambers\' deformation and destruction with conventional design,proposed the optimum design technology,discussed it\'s design principles,and introduced the equivalent formula of combined wells and the optimal construction process.

The causes of abnormal quality of environmental water due to excavation of the underground powerhouse group of a pumped storage power station were analyzed in this study.