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. The deformation and damage mechanisms of tunnel-surrounding rock masses have always been a major problem in underground engineering, and studying thesemechanisms plays an important role in preventing this kind of geologicaldisaster. Against the background of the above project, in this paper, we propose a new type of support structure: a composite cantilever support structure. Studies involving the numerical calculation and application ofthis support structure are carried out, and the conducted investigationindicates that (1) for a relatively broken rock mass, the composite cantilever support structure can effectively restrain the deformation of thetunnel-surrounding rock mass, (2) through numerical calculation, the appropriate design parameters of the support structure are obtained, and (3) thedesign parameters and design structure of the composite cantilever supportstructure must be further studied and verified under complex geologicalconditions by engineering.

A new type of auxiliary structure for tunnel-surrounding rock support – composite cantilever support structure