CAJ | 학술논문

煤田瞬变电磁探测经常是在干扰较强的煤矿周边进行,采集到的二次感应场信号大多噪声水平较高,难以开展解释工作.为消除外数据中的这些电磁干扰,根据衰减曲线单向衰减的形态特征,通过应用卡尔曼滤波技术压制各种干扰,较好地恢复数据始信号.通过对受到高压线电磁干扰的煤矿采空区实际探测数据进行该滤波方法的处理解释,对比滤波后数据与高压线断电后测区重测的不受干扰的数据,得到了基本一致的效果,证明了该方法的有效性.
매전순변전자탐측경상시재간우교강적매광주변진행,채집도적이차감응장신호대다조성수평교고,난이개전해석공작.위소제외수거중적저사전자간우,근거쇠감곡선단향쇠감적형태특정,통과응용잡이만려파기술압제각충간우,교호지회복수거시신호.통과대수도고압선전자간우적매광채공구실제탐측수거진행해려파방법적처리해석,대비려파후수거여고압선단전후측구중측적불수간우적수거,득도료기본일치적효과,증명료해방법적유효성.
Coal transient electromagnetic exploration is often conducted around a coal mine where man-made in-terference is stronger, noise in a secondary induction field signal is mostly higher, it is difficult to carry out proc-essing and interpretation. In order to eliminate these electromagnetic interference in data, according to the mor-phological characteristics (One-way attenuation) of decay curve, by Kalman filtering method, suppressing inter-ference can be quick and easy, and the original signal is better restored. By using this method to process and inter-pret the actual data affected by electromagnetic interference of high voltage line, comparison of data after filtering with data collected after power off of high voltage line, data have been basically consistent, demonstrating that the method is effective.