This paper presents the reason for instability of underground construction.In order to know failure mechanism during the whole construction process,a research framework of multi-scale based on experiments and numerical analysis is established.Some promising aspects in the topics of stability control are also given in the paper. This paper presents the reason for instability of underground construction. Order to know failure mechanism during the whole construction process, a research framework of multi-scale based on experiments and numerical analysis is established. Certain promising aspects in the topics of stability control are also given in the paper.