Study On The Deformation Mechanism Of Deep Soft Rock Tunnel And Its Control

The key of deep soft rock tunnel maintaining is to accurately grasp the deformation characteristics. Based on the typical deep soft rock tunnel in some coal mine, the variation of the stress state in the tunnel is analyzed. In addition, the formation process of the plastic zone in the deep soft rock tunnel is presented and the effects of deep mining on the tunnel deformation are studied. In the end of the paper, according to the characteristic of large deformation, the optimal supporting methodology is proposed and applied in the coal mine, which efficiently controls the deformation in the deep soft rock tunnel.