基于FLAC的深立井井筒不同支护条件下围岩稳定性研究

It is important to study on the stability of the surrounding rock of the mine shaft deep excavation section in the different support conditions for deep mining. Taking shaft deep section of No.3 Pan mine as an example, it is simulated and calculated for the damage range of the different lithologies in different depth section of the shaft and the stability of surrounding rock of the mine shaft in the different support conditions with FLAC3D software. The result shows: The surrounding rock plastic damage range of the shaft increases with the reduction of surrounding rock strength. And the plastic damage range is the biggest when the surrounding rock of the shaft is bauxitic mudstone. The effect of reinforced concrete shaft wall support is better than the anchor support. Anchor support can improve the stability and reduce the plastic damage range for the low strength surrounding rock .The research result provides references for the mine shaft deep excavation and the different choices of the support .