| 瞬变电磁法在高速公路采空区勘测中的应用 |
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| 引用本文： | 王俊茹,张吉恒,许柏青.瞬变电磁法在高速公路采空区勘测中的应用[J].物探与化探,2007,31(4):358-360,364. |
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| 作者姓名： | 王俊茹 张吉恒 许柏青 |
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| 作者单位： | 1. 石家庄经济学院,河北,石家庄,050031
2. 核工业航测遥感中心,河北,石家庄,050031 |
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| 摘 要： | 应用瞬变电磁勘探方法对青岛至兰州高速公路采空区进行勘察，介绍了瞬变电磁法野外数据采集技术，并对采空区、地层塌陷处的瞬变电磁法电阻率异常特征进行了分析和研究，查明了采空区的分布位置和埋深，取得了有价值的结论：瞬变电磁法勘察效果的好坏主要取决于装置类型及其他技术参数的选择，如根据测区电阻率、最小和最大探测深度，确定最小和最大延时；进行解释时，掌握测区可能出现的地层，找准采空区和围岩所处的电阻率范围非常重要，特别注意区分采空区与陷落柱的电阻率差异。在本勘测区，采空区表现为高阻，陷落柱表现为低阻，这已由钻探所证实。
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| 关 键 词： | 瞬变电磁法 电阻率 采空区 勘察效果 |
| 文章编号： | 1000-8918（2007）04-0358-03 |
| 修稿时间： | 2006-08-10 |
THE APPLICATION OF TIME DOMAIN ELECTROMAGNETIC METHODS TO THE DETECTION OF MINED-OUT AREA UNDER HIGHWAY |
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| WANG Jun-ru,ZHANG Ji-heng,XU Bai-qing.THE APPLICATION OF TIME DOMAIN ELECTROMAGNETIC METHODS TO THE DETECTION OF MINED-OUT AREA UNDER HIGHWAY[J].Geophysical and Geochemical Exploration,2007,31(4):358-360,364. |
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| Authors: | WANG Jun-ru ZHANG Ji-heng XU Bai-qing |
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| Institution: | 1. Shijiazhuang University of Economics ,Shijiazhuang 050031, China; 2. Airborne Survey and Remote Sensing Center ofNucilear industry,Shijiazhuang 050031 ,China |
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| Abstract: | This paper sets forth the prospecting effect of transient electromagnetism to the stratum collapse of mind - out area under highway of Qingdao to Lanzhou. Introducing the field data collected technique of transient electromagnetism, analyzing and studying the resistivity abnormity features of mind-out area and stratum collapse. Finding the distributed location and deepness and taking valuable conclusion. The prospecting effect of transient electromagnetism rests with the choice of array type and other technical parameters. From resistivity and minimum and maximum exploration depth to ascertain minimum and maximum time delay. It is to be very important of holding the potential stratum and grasping the resistivity confine of mind-out area and the surrounding rocks. Specially remarking to distinguish the resistivity difference of mind-out area and cave-ins. Drilling has verified the mind-out area is high resistivity and the cave-ins are low resistivity in this location. |
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| Keywords: | transient electromagnetism resistivity mined-out area prospecting effert |
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