基于高密度电阻率法的露天铁矿采空区探测的研究

On the Detection of Mined-out Areas in Open-air Iron Mine Based on the High Density Resistivity Method

露天铁矿开采区地下浅部大量采空区的存在,给矿山的人员及生产安全带来极大的威胁。为保证生产活动的顺利进行,必须对采空区进行精确探测。由于高密度电阻率法较常规电法具有信息丰富、精度高的特点,运用该法对露天铁矿采空区进行探测,结合数据反演断面图,在地下50m的范围内,共划定采空区四处,并精确划定采空区顶底板深度、水平范围和展布方向,为矿山的治理工作提供了可靠依据。并且在分析采集数据的基础上,总结出视电阻率识别模型及其主要特点,为地下采空区的划定提供了理论基础。

The existence of a large number of mined--out areas in shallow underground of open--air iron mine brings a great threat to the people＇s safety and work security. In order to ensure the work smoothly, it is necessary to detect the mined--out areas accurately. Compared with the traditional electrical methods, the high density resistivity method has the features of richer information and higher precision. Adopting this method to detect the mined--out areas in the open--air iron mine with the inversion sections, four mined--out areas are found within 50 meters underground, and their depth of roofs and floors, horizontal scope and distributing direction, which provides reliable evidence for the corporation to manage the mined--out areas. And based on the analysis of the data collected, this paper summarizes the apparent resistivity identification model and its main features provides the theoretical basis for delimitating the mined--out areas of the underground.