Microtremor Measurement of Rock Mass and Its Application to Rock-fall Hazard Assessment

岩崩危险性评价是公路、铁路养护中不可缺少的环节。因此，需要对危害进行简单定量的评估。从这个角度出发，提出了几种基于振动测量的方法。在本研究中，我们提出了一种基于微震水平-垂直固有频率比估计岩体倾倒加速度的新方法。我们将该方法应用于岩体，并表明估计的倾倒加速度与其他作者提出的方法的结果一致。

Rock-fall hazard assessment is indispensable procedure in maintenance of roads and rail tracks. So, a simple and quantitative evaluation of the hazard is needed. From this point of view, several methods based on vibration measurements have been presented. In this study, we proposed a new method to estimate toppling acceleration of a rock mass based on the horizontal-to-vertical natural frequency ratio of microtremors. We applied the method to rock masses and showed that the estimated toppling accelerations were consistent with results obtained from the method proposed by other authors.