基于高精度磁测方法的采空区平面边界探测研究  

Research on Plane Boundary Detection of Goaf Based on High Precision Magnetic Survey Method

作　　者：谷蓬禹 姚玉增[1] 贾三石[1] 程浩 闫迪 GU Pengyu;YAO Yuzeng;JIA Sanshi;CHENG Hao;YAN Di(School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《金属矿山》2024年第2期247-254,共8页Metal Mine

基　　金：“十三五”国家重点研发计划项目(编号:2016YFC0801603)。

摘　　要：采空区空间位置、规模、所处地质环境等各不相同,探测手段和数据处理方法也各异,而采空区的平面边界始终是探测难点之一。本研究在苏尼特右旗锰—萤石矿区典型区域内进行了地面高精度磁法测量,按照磁法异常圈定了采空区平面边界并进行了工程验证,结果表明:(1)锰矿开采残留的顶底板及锰矿化蚀变围岩呈明显高磁异常,而采空区则呈现明显的低磁异常,故高磁异常中包含的低磁异常区是采空区的良好标志,低磁异常边界基本反映了采空区的平面边界;(2)在采空区平面边界精准识别基础上,采用高密度电阻率法或地质雷达等方法确定采空区垂向位置,可以大大提高采空区探测效率。本研究不仅对本矿区今后的采空区治理具有重要意义,同时对其他类似矿区的采空区探测提供了有益的借鉴。The spatial location,scale,and geological environment of the mining goaves are variant,and the methodologies of detection and data processing are also different,while the planar boundaries of the mining goaf have always been the difficul-ty in the detection of the mining area.A ground-based high-precision magnetic survey was carried out in a typical area of the manganese-fluorite mining area in Sunit Right Banner,Inner Mongolia and the planar boundary of the mining goaf was delinea-ted according to the magnetic anomaly and verified by drilling.The results show that:①The residual roof and footwall ore beds and manganese mineralized alteration wall-rocks exhibit obvious high magnetic anomalies,while the area of goaf is low,i.e.,the low magnetic anomalies enclosed in the high anomalies are good indicators of goaves,and the boundary of low magnetic a-nomalies basically reflects the planar boundary of the goaf.②Based on the accurate delineation of the planar boundary of the mining goaf,the vertical depth of the mining goaf can be determined by the multi-electrode resistivity method and geo-radar,which can greatly improve the detection efficiency of the mining goaves.The research is not only of great significance to the de-tection and management of the mining gloves in the later stage of the Sunit mining area,but also provides a useful reference for the goaf-detection in other similar mining districts.

关 键 词：采空区 高精度磁法 平面边界 锰-萤石矿 

分 类 号：TD853[矿业工程—金属矿开采]