矿井瞬变电磁全区视电阻率差值补偿算法  

Difference Compensation Algorithm for All- time Apparent Resistivity of Mine Transient Electromagnetic Method

作　　者：陈桂军[1] 王子中[1] 张雪英[1] 李凤莲[1] 张文栋[1] 

机构地区：[1]太原理工大学信息工程学院,山西太原030024

出　　处：《煤矿安全》2014年第3期175-178,共4页Safety in Coal Mines

基　　金：山西省科技重大专项资助项目(20121101004);山西省科技攻关资助项目(20130321004-01)

摘　　要：基于全空间瞬变电磁理论,研究了不同发射线圈尺寸、不同采样时刻对电阻率求解唯一性的影响。然后将晚期视电阻率值作为求解初值,计算对应的归一化感应电动势,并计算其与实测值的差值,运用此差值对归一化感应电动势计算值进行补偿,提出全区视电阻率差值补偿算法。最后通过1、10、100Ωm电阻率理论模型计算,验证该算法在较少的迭代次数下可较大提高计算精度;实测资料处理结果表明,与半空间晚期计算方法相比,该算法具有较好的应用效果。Based on the full space transient electromagnetic theory, the uniqueness of apparent resistivity solution was studied with the different transmitter coil sizes and sampling times. The normalized induced electromotive force was calculated using late apparent resis- tivity, and the difference between the calculation value and the measured value was compared to compensate the normalized induced e- lectromotive force, the all- time apparent resistivity difference compensation algorithm was put forward. Finally, this algorithm under the less iterations number could greatly improve the calculation accuracy with theoretical model calculations of 1,10,100 Ωm resistivi- ty. The measured data processing results showed that this algorithm had a good application effect compared with late half - space calcu- lation method.

关 键 词：防治水 矿井瞬变电磁法 全区视电阻率 差值补偿 数值计算 

分 类 号：TD745[矿业工程—矿井通风与安全]