Key Control Technologies of Road and Bridge Engineering in Subsidence Area With Saturated Loose Layer

The control in surface subsidence area of Zhaogu No.2 Mine has characteristics of saturated surface loose layer, thick alluvium, thickness of coal seam mining, which causes many difficulties such as large surface subsidence, hard road and bridge reinforcement. The laws of mining subsidence and the reinforcement scheme for road and bridge are studied under differnent mining thickness by using theoretical analysis and numerical simulation. The reinforcement for road and bridge in subsidence area with saturated loose layer is achieved, which can meet the special requirements of significant differential settlement in subsidence area.