CAJ | 학술논문

在冬瓜山矿区开展干扰源位置的调查中，在试验剖面上利用频谱分析仪开展了电磁场五分量的实际测量，初步分析了冬瓜山矿区电磁干扰特征。实测结果表明，冬瓜山矿区电磁干扰以工频奇次谐波干扰为主，某些测点偶次谐波也很强；工频谐波的干扰级次与受干扰程度有关；不同测点由于相对于周围干扰源位置的变化，其干扰特征也不相同；对于单个测点，不同分量的不同频段受到的干扰程度也不尽相同。除有规律的工频干扰外，还存在宽频的背景干扰。此干扰存在于整个频谱范围内，幅值相对稳定。长时间噪声观测结果表明，在时间上矿区内也不存在干扰弱的时段。
재동과산광구개전간우원위치적조사중，재시험부면상이용빈보분석의개전료전자장오분량적실제측량，초보분석료동과산광구전자간우특정。실측결과표명，동과산광구전자간우이공빈기차해파간우위주，모사측점우차해파야흔강；공빈해파적간우급차여수간우정도유관；불동측점유우상대우주위간우원위치적변화，기간우특정야불상동；대우단개측점，불동분량적불동빈단수도적간우정도야불진상동。제유규률적공빈간우외，환존재관빈적배경간우。차간우존재우정개빈보범위내，폭치상대은정。장시간조성관측결과표명，재시간상광구내야불존재간우약적시단。
The electromagnetic noise sources in the Dongguanshan ore district were investigated in this paper, and the five-component electromagnetic field was measured along the test profile with spectrum analyzer. According to test results, the electromagnetic noise is mainly composed of 50 Hz and its odd harmonics, and the even harmonics is also strong at some sites;the harmonic number of noise is related to the intensity of noise;not only the electromagnetic noise characteristics are different from each other at different sites, but al-so the noise characteristics of each component are different. Except for the regular noise, there exists ambient broad banded noise, which occurs at all the frequency band, with stable amplitude. The result of long time noise measurement shows that there is not any weak-noise time interval in this ore district.