机构地区: 中南大学
出 处: 《金属矿山》 2007年第11期32-34,共3页
摘 要: 移动荷载是影响露天矿边坡体的稳定的一个重要原因。新桥矿边坡移动荷载测试表明,低频振动在整个频域中所占比例较大,振动低频主要分布在10~60 Hz之间;火车荷载振动的传播速度均值在0.01 m/s以下;移动荷载应力波传播距离一般在5~20 m;振动波谱高频分量被钢轨瞬时吸收,对路基和边坡的影响较小,中频低频分量通过轨道传至路基,对远场的路基和边坡体产生非稳定的激励振动,影响路基和边坡体的结构稳定。在实际工程中,进行局部加固可防止扰动区域内的砂土体液化。 Moving load is an important factor affecting the open-pit slope.The moving load dynamic test on Xinqiao Mine slope indicates that low frequency vibration takes a larger proportion in the whole frequency domain and the vibration low frequency mainly varies between 10 to 60Hz.The propagation velocity of train loading is below 0.01 m/s on average and the propagation distance of the stress wave from moving load is generally between 5 to 20m.The high frequency component of vibration spectrum is absorbed instantl...
领 域: [矿业工程]