城镇有限场地条件下的物探找水试验
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摘要
为在城区强干扰环境、有限场地条件下进行物探方法找水,特利用等值反磁通瞬变电磁法,在湖南郴州市某城镇进行了野外试验。在地表调查和周边人文环境基础上,常规电测深等找水有效手段在城镇区域难以施工,面对这个难题利用等值反磁通瞬变电磁法进行试验,其利用对偶中心耦合装置消除了收发线圈感应耦合来消除干扰。首先根据地质信息设计了近似南北向的4条剖面,然后进行了发射频率试验并进行单点连续探测,最后利用探测结果绘制了多测道曲线和二维模拟断面等值线图并设计了钻孔。钻探验证结果表明:等值反磁通瞬变电磁法在强干扰、场地受限的城镇区域找水效果较好,是一种值得推广的新方法。
In order to find water by the geophysical exploration method under the strong interference environment and limited site conditions in the urban area, a field experiment was conducted in a town in Chenzhou City, Hunan Province by the equivalent anti-magnetic transient electromagnetic method. On the basis of surface survey and surrounding humanistic environment, conventional methods such as conventional electric sounding are difficult to construct in urban areas. In the face of this problem, the equivalent diamagnetic transient electromagnetic method is used to test the effect, first according to geology.The information is designed with four profiles in the north-south direction. Then, the transmission frequency test is carried out and a single point continuous detection is carried out. Finally, the multi-channel curve and the two-dimensional pseudosection are drawn and the drilling is designed. The results of drilling verification show that the equivalent anti-flux transient electromagnetic method is better in finding water in urban areas with strong interference and limited space, and it is a new method worthy of promotion.
In order to find water by the geophysical exploration method under the strong interference environment and limited site conditions in the urban area, a field experiment was conducted in a town in Chenzhou City, Hunan Province by the equivalent anti-magnetic transient electromagnetic method. On the basis of surface survey and surrounding humanistic environment, conventional methods such as conventional electric sounding are difficult to construct in urban areas. In the face of this problem, the equivalent diamagnetic transient electromagnetic method is used to test the effect, first according to geology.The information is designed with four profiles in the north-south direction. Then, the transmission frequency test is carried out and a single point continuous detection is carried out. Finally, the multi-channel curve and the two-dimensional pseudosection are drawn and the drilling is designed. The results of drilling verification show that the equivalent anti-flux transient electromagnetic method is better in finding water in urban areas with strong interference and limited space, and it is a new method worthy of promotion.
引文
曹创华,邓专,康方平等,2018.地球物理信息在湘潭锰矿地质灾害评价中的作用[J].物探与化探,42(3):631-639.
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牛之琏,2007.时间域电磁法原理[M].长沙:中南大学出版社.
王银,席振铢,蒋欢等,2017.等值反磁通瞬变电磁法在探测岩溶病害中的应用[J].物探与化探,41(2):360-363.
薛国强,2004.论瞬变电磁测深法的探测深度[J].石油地球物理勘探,39(5):575-578.
席振铢,龙霞,周胜等,2016.基于等值反磁通原理的浅层瞬变电磁法[J].地球物理学报,59(9):3428-3435.
赵思为,2017.瞬变电磁法在西南喀斯特地区充水型溶洞浅层勘察中的应用[J].铁道勘查,43(5):102-105.
XI Zhenzhu, LONG Xia, HUANG Long, et al, 2016. Opposing-coils transient electromagnetic method focused near-surface resolution[J].Geophysics, 81(5):279-285.
高远,2018.等值反磁通瞬变电磁法在城镇地质灾害调查中的应用[J].煤田地质与勘探,46(3):152-156.
静恩杰,李志腆,1995.瞬变电磁法基本原理[J].中国煤田地质,7(2):3-87.
李貅,2002.瞬变电磁测深的理论与应用[M].西安:陕西科学技术出版社.
龙慧,孙晟,刘义,等,2018.西宁盆地北西缘南门峡一台子地区断裂构造地球物理探测[J].物探与化探,42(2):241-246.
牛之琏,2007.时间域电磁法原理[M].长沙:中南大学出版社.
王银,席振铢,蒋欢等,2017.等值反磁通瞬变电磁法在探测岩溶病害中的应用[J].物探与化探,41(2):360-363.
薛国强,2004.论瞬变电磁测深法的探测深度[J].石油地球物理勘探,39(5):575-578.
席振铢,龙霞,周胜等,2016.基于等值反磁通原理的浅层瞬变电磁法[J].地球物理学报,59(9):3428-3435.
赵思为,2017.瞬变电磁法在西南喀斯特地区充水型溶洞浅层勘察中的应用[J].铁道勘查,43(5):102-105.
XI Zhenzhu, LONG Xia, HUANG Long, et al, 2016. Opposing-coils transient electromagnetic method focused near-surface resolution[J].Geophysics, 81(5):279-285.
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