尾矿排放过程中排洪隧洞结构受力规律研究

Study on the Stress Variation of Flood-discharging Tunnel in Tailing Discharge Process

针对尾矿库尾矿排放的工程条件,基于地质因素分析,以数值模拟方式为主,分析了在不同尾砂堆积高度时排洪隧洞结构受力的变化情况,对隧洞支护结构受力进行步步监测。分析了隧洞支护结构受力在尾矿排放过程中的变化规律。结果表明,岩体上部尾砂堆积高度值与排洪隧洞支护结构弯矩值、剪力值、轴力值均成正比关系。

Through the numerical simulation,the stress variation of the flood-discharging tunnel in different height of tailing accumulation is analyzed according to the tailing discharge condition of tailing dam and the geological factors,thus the stress of tunnels supporting structure is monitored step by step.The variation law of the tunnels supporting structure stress in the tailing discharge process is obtained.Experimental results show that the tailing accumulation height of the top rock is proportional to the moment value,shear force value and the axis force value.