叠加次数对瞬变电磁探测效果的试验研究  

Layers on the Experimental Study of the Effect of Transient Electromagnetic Exploration

作　　者：卢文华[1] 杨亚新[1] 吴信民[1] 黄建国[1] 

机构地区：[1]东华理工大学核工程与地球物理学院,江西南昌330013

出　　处：《工程地球物理学报》2016年第1期105-108,共4页Chinese Journal of Engineering Geophysics

基　　金：国家自然科学基金项目(编号:41174107)

摘　　要：在野外生产实验过程中,瞬变电磁探测效果受到通讯线和高压线的干扰,为此进行了多次实验。研究了在通讯线和高压线不同干扰的环境下,相同的叠加次数探测效果的比较;在高压线干扰的情况下探测效果与叠加次数的关系;以及在高压线区域探测时增大叠加次数至60 000次后压制干扰的效果与平滑滤波后压制干扰效果的对比。实验结果表明,不同的探测环境,需要的叠加次数不一样。类似通讯线干扰源较小的地方1 000次左右叠加就能满足探测要求,而在高压线干扰源较大的地方需要增加叠加次数,才能得到相对较好的数据。随着叠加次数增加,干扰信号影响越小,探测效果也越好。将高压线干扰区域叠加1 000次和3 000次的数据进行平滑滤波后与叠加次数60 000次的结果对比,可知叠加60 000次比平滑滤波能达到更好的探测效果。This paper mainly discusses the transient electromagnetic exploration interferenced by communication lines and high tension lines in the process of production in the field experiment,therefore the experiment has been carried on many times. The communication line and high tension line are discussed under different interference environment and the same number of superimposed times. The relationship between detection effect under the interference of high tension line and superimposed times are studied. And the comparison between detection effect when superimposed times is up to 60 000 times in the high tension line and the suppress interference effect after the smoothing filter are made. The experimental results show that the different detection environment needs different superimposed layers. 1 000 times superposition can satisfy the detection requirements in interference sources of the smaller places and in the high tension line interference sources need to increase the superposition times. As superposition times increased, the smaller the interference signal, the detection effect is better. When compared with the result of 1000 times and 3 000 times in the highline area superimposed data after the smoothing filter with that of 60 000 times, superposition of known 60 000 times can achieve better detection result.

关 键 词：高压线 叠加次数 探测效果 滤波 

分 类 号：P631.3[天文地球—地质矿产勘探]