弃渣场扩容条件下渣体边坡稳定性影响因素研究

Study on Influencing Factors of Slag Slope Stability Under Capacity Expansion of Spoil Ground

针对以往沿原渣体坡面进行渣场扩容堆渣后渣体边坡稳定性较差的问题,本文采用现场调查、理论分析和数值模拟的方法,分析弃渣场扩容条件下影响其稳定性的主要因素,并提出分散式堆填方式。研究结果表明:采取分散式扩容堆填方式相较于常规堆填扩容方式渣体边坡安全稳定性明显提高;采取a坡顶覆盖加高式和b坡面扩展推移式两种常规堆填方法,在恶劣工况条件下安全稳定性普遍较低,存在较大失稳风险;弃渣体边坡稳定性影响因素中,暴雨对边坡稳定性影响最大,其次为扩容渣体堆填方式。

In view of the poor stability of the slag slope after the slag yard expansion along the original slag slope,this paper analyzes the main factors affecting the stability of the spoil under the condition of capacity expansion by field investigation,theoretical analysis and numerical simulation,and puts forward the decentralized filling mode. The results show that: compared with the conventional method,the safety and stability of the slag slope are obviously improved. The safety and stability of slope a and slope b are generally lower and there is a greater risk of instability under severe working conditions. Among the influencing factors of the slope stability,rainstorm has the greatest influence on the slope stability,followed by the expansion of the slag filling mode.