关键词: 高地应力, 锚索束+注浆加固, 数值模拟, 底板支护, 围岩应力

Abstract: Aiming at the roadway characteristic of large buried depth and high ground stress in xin zhuang mine, the concept of anchor supporting and grouting reinforcement of surrounding rock of roadway was put forward and the FLAC3D numerical simulation was used to study the influence factors of roadway stability in three different supporting form in the article. The results show that the weak link with high ground stress should be avoided in the process of roadway support. With the increase of floor support strength, the shallow surrounding rock stress distribution of roadway is more uniform, the stress concentration phenomenon in roadway's two angle is weaker, the ability of transferring surrounding rock stress of roadway floor from the deep to the shallow is lower. The supporting form of anchor beam and grouting reinforcement not only effectively reduces amount of floor heave but also solves the problems of roadway collapse and roof caving very well. The results show that the deformation of roof and floor reduces 85.5% and 92.7% respectively in the field and the supporting form has obvious feasibility and superiority.

Key words: high ground stress, anchor beam and grouting reinforcement, numerical simulation, floor supporting, surrounding rock stress