CAJ | 학술논문

矿井巷道掘进过程中，利用瞬变电磁法超前探水因易受电磁干扰而使测试效果变差，尤以金属干扰最突出。因此，研究金属干扰特征对于井下水害超前探查技术的提高具有重要意义。针对超前探测情况，以锚杆作为主要干扰源，按现场实际干扰情况，设计井下实体模型试验。分析测试数据认为：锚杆对瞬变电磁探测的干扰程度及特征主要受其自身空间状态(x，y，L)决定；初步确定锚杆的最大干扰距离d为3 m，其中，1.5 m内具有强干扰，1.5～3.0 m区域干扰较弱；划定锚杆外露长度L在0.5 m内为干扰程度变化敏感区，0.5～1.7 m以上基本持水平状态。通过2根锚杆测试数据的对比，近似认为组合干扰信号为2根锚杆单独响应信号的垂直叠加，该结果为金属干扰的校正技术研究提供可循规律。最后，指出受金属干扰的数据需研究其有效性。
광정항도굴진과정중，이용순변전자법초전탐수인역수전자간우이사측시효과변차，우이금속간우최돌출。인차，연구금속간우특정대우정하수해초전탐사기술적제고구유중요의의。침대초전탐측정황，이묘간작위주요간우원，안현장실제간우정황，설계정하실체모형시험。분석측시수거인위：묘간대순변전자탐측적간우정도급특정주요수기자신공간상태(x，y，L)결정；초보학정묘간적최대간우거리d위3 m，기중，1.5 m내구유강간우，1.5～3.0 m구역간우교약；화정묘간외로장도L재0.5 m내위간우정도변화민감구，0.5～1.7 m이상기본지수평상태。통과2근묘간측시수거적대비，근사인위조합간우신호위2근묘간단독향응신호적수직첩가，해결과위금속간우적교정기술연구제공가순규률。최후，지출수금속간우적수거수연구기유효성。
During the process of roadway construction in mine,the effect of advanced water exploration using transient electromagnetic method is often poor because of the interferences of electromagnetic field,in which the metal interfering the most. So,the study for the interference characteristic of metal has an important significance to improve the technology of advanced water exploration. For advanced detection,the roof bolt can be suggested as the main interference source,and the experiment of entity model is designed as its practical situation in working face. The test data analysis shows that the interference degree and stamp of roof bolt are decided by its own spatiality,including the plane coordinates(x,y) and the exposed length(L). The maximum jamming range of roof bolt d is confirmed as 3 m primarily. Among this range,the areas interfering strongly range from 0m to 1.5m and the weak range from 1.5 m to 3.0 m. And the sensitive variation range of interference by the roof bolt′s exposed length distribution is delimitated from 0 m to 0.5 m,but the range from 0.5-1.7 m remains basically stable. In addition,through the contrast between the superposed and measured values,the values of combination interference signal induced by two roof bolts are approximately equal to the vertical stacking of the amplitude of transient electromagnetic field induced by any one of roof bolts respectively. The achievements can provide a rule for the research on the technology of interference correction of metal. Last,the paper point that the validity of test data influenced by roof bolts need an intensive study.