摘要
广西巴马—凭祥高速公路途经众多矿区,煤矿开采后形成的采空区会导致道路出现裂缝或塌陷,因此精准探测采空区的位置是保证施工安全与行车安全的前提。采用地质雷达法、高密度电法和地震波散射法对某疑似采空区进行了综合探测,并采用钻孔法对物探异常点进行验证,以此比较3种物探方法的全面性与可靠性。研究结果显示测区内共发现4处物探异常点,但经钻孔法验证后发现只有3处病害,其中1处钻孔未发现病害,这可能是物探结果出现误差,也可能是“一孔之见”造成的不准确;单一的物探方法会造成探测缺陷,应综合使用地质雷达法、高密度电法和地震波散射法进行探测分析,并采用钻孔法验证探测结果的准确性;根据钻探结果,在该研究选择的特定仪器参数前提下,高密度电法与地震波散射法的探测准确性高于地质雷达法,可为后续相似工程的物探研究提供指导。
The Bama-Pingxiang Expressway in Guangxi passes through numerous mining areas,and the goaf formed after coal mining cause cracks or collapses in the road.Therefore,accurate detection of the location of the goaf is a prerequisite for ensuring construction safety and driving safety.A comprehensive detection of a suspected goaf was carried out by geological radar method,high-density electrical method and seismic wave scattering method,and geophysical anomaly points were verified by drilling method.The comprehensiveness and reliability of the three geo-physical methods were compared.The research results found that 4 geophysical anomalies were discovered in the survey area,but only 3 defects after verification by drilling method.Among them,no defects were found in 1 borehole,which may be caused by errors in geophysical results or inaccuracies caused by “one hole observation”;A single geophysical method can cause detection defects.Therefore,detection and analysis should be comprehensively made by geological radar method,high-density electrical method,and seismic wave scattering method.The accuracy of the detection results should be verified by drilling method;According to the drilling results,under the specific instrument parameters selected in this study,the detection accuracy of high-density electrical method and seismic wave scattering method is higher than that of geological radar method,which can provide guidance for subsequent geophysical research of similar projects.
作者
方志江
龚文剑
张仰鹏
焦晓东
颜志铭
Fang Zhijiang;Gong Wenjian;Zhang Yangpeng;Jiao Xiaodong;Yan Zhiming(Guizhou Communications Construction Group Co.,Ltd.,Guiyang 550002,China;Guangxi Transportation Science and Technology Group Co.,Ltd.,Nanning 530007,China;Guangxi Key Lab of Road Structure and Materials,Nanning 530007,China)
出处
《市政技术》
2024年第10期37-44,51,共9页
Journal of Municipal Technology
基金
广西重点研发计划项目(桂科AB22080012,桂科AB23026144)。
关键词
采空区
高密度电法
地质雷达法
地震波散射法
goaf
high density electrical method
geological radar method
seismic wave scattering method
