物探技术在采区陷落柱探测上的应用

Application of Geophysical Prospecting Technique to Detecting Subsided Column in Mining Area

为了降低陷落柱对采区安全生产的影响,需要对陷落柱的发育位置及影响范围进行精准探测。通过对云冈矿地质特征及陷落柱特征的分析,采用瞬变电磁法和无线电波透视法探测陷落柱。结果表明:在瞬变电磁法中,陷落柱的视电阻率呈近似不规则四边形,其阻值一般比正常的岩体高;在无线电波透视法中,陷落柱的场强一般呈V字型,出现异常区域的形状类似矩形。

To make an accurate prospecting of development position and impact range of subsided column,the author proposes the transient electromagnetic method and the radio wave penetration method by analysis of geological and subsided column characteristics,in which the approximate trapezium apparent resistivity of subsided column is shown with higher resistance than normal rock body in transient electromagnetic method,and the V-shaped field intensity is shown with approximate rectangle in abnormal area in radio wave penetration method.