Abstract

In this study, time domain reflectometry (TDR) is engaged to observe coaxial cable deformity caused by slope movements. Laboratory shear tests were executed to measure the deformity magnitude caused by shear failure using two coaxial cables—RG-6 and RG-213. Two assessments are performed in laboratory testing, to determine the deformity magnitude—shear test and open-cast (OC) model. For shear test, two regression methods are computed—linear and quadratic regression. The quadratic regression results show more effective positive correlation with shear deformity as compared to linear regression results. For RG-6 and RG-213 cables, the average highest magnitude of coaxial cable deformity by shear failure is 11 mm and 14 mm, respectively, which are equivalent to reflection coefficient (RC) of 0.49 and 0.050 for RG-6 and RG-213, respectively, beyond which the cable breached. Field tests are also performed, which concluded that TDR is the most preferable technique to monitor slopes of OC mines.

中文翻译：

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研究时域反射法预测露天矿的边坡破坏

摘要

在这项研究中，使用时域反射仪（TDR）来观察由倾斜运动引起的同轴电缆变形。使用两条同轴电缆RG-6和RG-213进行了实验室剪切测试，以测量由剪切破坏引起的变形量。在实验室测试中进行了两次评估，以确定变形量级-剪切测试和露天（OC）模型。对于剪切测试，计算了两种回归方法-线性回归和二次回归。与线性回归结果相比，二次回归结果显示出与剪切变形更有效的正相关。对于RG-6和RG-213电缆，由于剪切破坏而引起的同轴电缆变形的平均最大幅度分别为11 mm和14 mm，相当于RG-6和RG-的反射系数（RC）为0.49和0.050。分别为213 超出范围则电缆断裂。还进行了现场测试，得出的结论是，TDR是监测OC矿山坡度的最优选技术。