Numerical simulation study of anchor spacing on the supporting effect of surrounding rock in the large cavern

A certain mining plans to transfer the part of the ground producing-process to the underground cavern.They define the host rocks of the ore bodies as III~IV kind of rock mass with the poorer stability of wall rock severely threatening the stability of underground cavern group by the method of engineering analogy.Anchor supporting as one of the most important supporting measure in underground engineering is applied in all kinds of surrounding rock and adverse geological environment.This paper takes surrounding rock deformation,plastic zone and the anchor for the maximum stress as reference indicator and simulate the impact of bolting system with different space on the stability of cavern group’s host rocks by FLAC3D software combined with the feasible study of certain a mining,and ultimately obtain the best bolt space range through synthetic analysis.It’s of practical significance for the mining’s subsequent design and construction.