On a whole, the quality of rock mass in the chamber group is better.Because of tectonism, there are several structure planes in the rock mass.

• 总体上说,地下厂房区岩体质量较好,但由于多期的构造作用,在厂房区岩层中发育有不同级别的结构面,对围岩的稳定性有一定影响。