Comparative Analysis of Different Construction Methods for Mine Tunnels

Abstract

The construction of mining tunnels in cities often has a great impact on the stratum and surrounding environment. Relying on a drainage tunnel project in Wuhan, Plaxis3D finite element analysis software is used to simulate tunnel excavation under four typical construction methods. The ground conditions, tunnel size, burial depth, support and construction scheme are all guaranteed to be the same. The characteristics and rules of ground settlement, crown settlement and horizontal convergence caused by construction are mainly analyzed. The following results are obtained: For the four construction methods, the rules of ground settlement, crown settlement and horizontal convergence by tunnel excavation are basically the same. Except for the arch bottom uplift, the calculation results of the tunnel constructed by the double side drift method are the smallest, and the calculation results of the tunnel constructed by the bench method are the largest. The tunnels excavated by the CRD method and the CD method have similar calculation results and have relatively little impact on the stratum. The research results can provide references for other related projects in Wuhan.