利用综合物探法精准探测弓长岭露天矿采空区

为了对弓长岭露天矿采空区进行精准探测，首先根据高密度电阻率法，利用温纳、偶极、单边三极等装置采集的探测数据划分了各类地质条件下单采空区和双采空区的高、低阻模型，通过对比分析电阻率的差异，实现了对水平方向密集排列和垂向分布采空区的准确探测；然后结合瞬变电磁法，利用重叠回线、中心回线、分离回线、框一回线等装置，建立了同一地质体的地质及地球物理识别模型，通过观测线圈瞬变磁场结构、频率随时间和空间的变化信息，对该采空区的位置和规模进行了精准探测；最后，为了准确测定采空区的位置、规模、顶板厚度等信息，对高密度电阻率法、瞬变电磁法的探测数据进行处理，并结合现场地质实际情况进行综合解译，形成了采空区分布断面图和平面图。探测结果表明：弓长岭露天矿存在3个浅部采空区和2个深部采空区，进一步说明，将高密度电阻率法与瞬变电磁法有机结合，实现了探测技术的优势集成，有助于实现对采空区进行快速、准确探测。

Accurate Detection of the Goaf of Gongchangling Open-pit Based on the Comprehensive Geophysical Prospecting Method

In order to detect the goaf of Gongchangling open-pit accurately，the comprehensive geophysical prospecting method based on high density resistivity method and transient electromagnetic method is proposed.Firstly，according to the high density resistivity method，the low resistance model and high resistance model of single goaf and double goaf under all kinds of geological conditions based on the detection data obtained by the devices of wenner，dipole array and unilateral tertiary，the goaf of Gongchangling open-pit distributed densely in horizontal and vertical direction is detected by conducting contrast analysis of the resistivity difference;secondly，based on transient electromagnetic method，the geological and geophysical recognition model of the same geological body are established by utilizing the devices of coincident loop，central loop，separate loop and ground loop，and the location and scale of the goaf of Guangchangling open-pit are detected accurately by observing the variation information of the transient magnetic field structure and frequency along with time and space；finally，in order to detect the information of location，scale and roof thickness with high precision，the comprehensive detection data of high density resistivity method and transient electromagnetic method are processed and interpreted comprehensively combing with the field actual geological conditions.The cross-section diagram and floor plan of the goaf of Gongchangling open-pit are obtained.The detection results show that 3 shallow goafs and 2 deep goafs are detected in Gongchangling open-pit，so it can be further indicated that the integration of comprehensive and advantages of detecting technologies is realized by the organic combination of high density method and transient electromagnetic method.It is good to conduct the detection of goaf with high precision.