摘要
针对露天矿高边坡监测精度要求高、实时性强、难以全面覆盖、接触困难等问题,分析了地基雷达测量的技术特点,研究了基于地基雷达的露天矿高边坡形变监测方法及大气扰动改正、时序分析等关键技术。结合三友矿边坡变形监测试验,给出了地基雷达数据的处理流程,基于振幅离散指数、估计的稳定性指数、位移精度等参数的雷达数据质量评价方法。针对露天矿边坡长时间、远距离监测中的大气扰动问题,探索了基于PSC网的大气校正方法,取得较好的大气改正效果,监测结果与高精度测量机器人的监测结果相一致,验证了所提监测方法的有效性。研究结果表明:监测目标区域稳定边坡雷达影像的振幅离散指数优于0.1,相位估计的稳定性指数大于10,位移精度优于0.2 mm。PSC网大气校正能有效消除昼夜温差和湿度引起的相位变化,实现亚毫米级测量精度。基于时序分析技术,实现露天矿高边坡微形变监测,为矿山边坡安全提供了一种新的监测方法。
Aiming at the problems of high slope monitoring accuracy of open-pit mines,high real-time performance,difficulty in comprehensive coverage,and difficulty in contacting,the technical characteristics of ground-based SAR measurement were analyzed,and the monitoring method of high slope deformation in open-pit mine based on ground-based radar and the key technologies of atmospheric disturbance correction and time sequence analysis were studied.Combined with the deformation monitoring experiment of Sanyou Mine slope,the processing flow of ground-based radar data and the method of radar data quality evaluation based on amplitude discrete index,estimated stability index,displacement accuracy and other parameters was given.For the atmospheric disturbance problem in long-term and long-range monitoring of open-pit mine slopes,explored the atmospheric correction method based on the PSC network,and achieved good atmospheric correction effects.The monitoring results were consistent with the monitoring results of the high-precision measuring robot,which verifies the effectiveness of the monitoring method.The study results show that the amplitude dispersion index is better than 0.1,the phase estimation stability index is greater than 10,and the displacement accuracy is better than 0.2 mm.PSC network atmospheric correction can effectively eliminate the phase change caused by temperature difference between day and night and humidity,and achieve sub-millimeter measurement accuracy.The micro deformation monitoring of high slope in open pit is realized based on time series analysis technology,which provides a new monitoring method for mine slope safety.
作者
刘小阳
李峰
孙广通
钱安
朱红
李佳乐
LIU Xiaoyang;LI Feng;SUN Guangtong;QIAN An;ZHU Hong;LI Jiale(School of Ecology and Environment,Institute of Disaster Prevention,Sanhe 065201,China)
出处
《金属矿山》
CAS
北大核心
2020年第11期59-65,共7页
Metal Mine
基金
廊坊市科技支撑计划项目(编号:20200137047)
中央高校基本科研业务费专项(编号:ZY20180109)。
关键词
露天矿
地基雷达
边坡形变监测
大气校正
open-pit mine
ground-based synthetic aperture radar
slope deformation monitoring
atmospheric correction
