Taking the hydrogeological prospecting in an Inner Mongolia coalmine as example,has carried out large fixed-source loop installation and overlapped loop installation comparative tests,to study the issue of transient electromagnetic multiturn small wireframe overlapped loop installation exploring depth;compare moisture anomaly response features of the two installations.Start with analysis of acquired parameters from the two installations,compared their resistivity sounding curves and pseudosections.The result has shown that the stratifying ability of the two is the same,moisture anomaly spatial form identical;exploring depth of the two in study area is the same,but compared to the large fixed-source loop installation,the another covers less floor space with smaller volumetric effect,makes more obvious anomalous features.Thus,the multiturn small wireframe overlapped loop installation has been selected to carry out prospecting operation in the area.%以内蒙古某煤矿水文勘探为例,分别进行大定源回线装置和重叠回线装置试验,以研究瞬变电磁多匝小线框重叠回线装置探测深度问题,并对比二个装置对含水异常的响应特征.首先从大定源回线装置和多匝重叠回线装置的采集参数分析入手,对比两种装置的电阻率测深曲线和拟断面图.结果表明2种装置的电性分层能力相同,含水异常空间形态一致;在研究区内二种装置的勘探深度相同,但多匝小线框重叠回线装置相比大定源回线装置占地面积小,体积效应小,异常特征更明显,从而在本区内选择多匝小线框重叠回线装置进行勘探施工.
展开▼
