三维非常规被动源面波勘探在露天矿采空区探测中的应用研究  

Application of 3 D Unconventional Passive Source Surface Wave Exploration in Goaf Detection in Open-pit Mine

作　　者：王立熊 WANG Lixiong(Geological Survey Center,China Coal Pingshuo Group Co.,Ltd.,Shuozhou 036000,China)

机构地区：[1]中煤平朔集团有限公司地质测量中心,山西朔州036000

出　　处：《山西煤炭》2023年第2期116-122,共7页Shanxi Coal

摘　　要：露天煤矿采空区的常规物探方法易受场地环境、地质条件等的影响,探测效果欠佳。以安家岭露天煤矿为例,通过改进传统的被动源面波勘探方法,采取呈三条平行线展布的检波点阵列记录被动源面波信号,并利用平面波基函数直接扫描不同时间窗口的原始信号,来获取与地下介质有关的面波频散信息,然后反演频散曲线,得到测区的横波速度剖面图,根据剖面图低速特征圈定出采空区范围与边界。通过钻孔验证发现,探测异常与实际采空区吻合,说明该方法在煤矿采空区探测中有效,为今后煤矿采空区的探测提供了指导。The conventional geophysical prospecting methods in open-pit mines are limited by the site environment and geological conditions with poor goaf detection effect.Taking Anjialing Open-pit Mine as an example,passive source surface wave signals were recorded with a dot array of wave detection in three parallel lines by improving the traditional passive source surface wave exploration;the plane wave basis function was used to directly scan the original signals in different time windows to obtain the surface wave dispersion related to the underground medium,and then the dispersion curves were inverted to obtain the shear wave velocity profile of the survey area;finally,the goaf boundary was circled according to the low-velocity characteristics of the profile.The borehole verification demonstrated that the detection was effective due to the match between the detected abnormal area and the actual goaf,which could provide guidance for goaf detection in the future.

关 键 词：露天煤矿 采空区 面波勘探 基函数 频散曲线 

分 类 号：TD164[矿业工程—矿山地质测量]