RESEARCH ON TRANSIENT ELECTROMAGNETIC FIELD OF MINE WATER-BEARING STRUCTURE BY PHYSICAL MODEL EXPERIMENT
RESEARCH ON TRANSIENT ELECTROMAGNETIC FIELD OF MINE WATER-BEARING STRUCTURE BY PHYSICAL MODEL EXPERIMENT
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矿井含水结构瞬变电磁场物理模型实验研究
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Liu, Yangguang
中科院分区：
文献类型：
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作者：
Liu, Shucai;Liu, Zhixin;Liu, Yangguang
通过物理模型实验，研究了矿井含水构造的瞬变电磁响应特征，为改进矿井含水构造的解释方法和提高探测精度提供了重要依据。根据物理模型相似准则，计算了物理模型的具体参数和相应的修正系数。此外，建立了矿井含水构造模型和发射、接收装置，并对天线参数和探测能力进行了对比分析，结果表明：在发射天线参数相同的情况下，接收天线匝数越多，接收信号越强;发射线圈中的电流越大，接收到的信号越强。在相同条件下，通过对巷道空间感应场与巷道空间内金属体的干扰特性进行物理模型实验，得出了巷道空间感应场与金属体干扰的物理模型，并对巷道空间感应场与金属体干扰的物理模型进行了分析，得出了巷道空间感应场与金属体干扰的物理模型。结果表明：当天线靠近含水建筑物一侧时，接收到的响应值最大;当天线远离含水建筑物一侧时，受巷道间距的影响，探测能力较低;巷道间距内的金属（工字钢、金属网、钢轨）的响应值变大，但对含水建筑物的响应规律没有影响。
By using the physical model experiment,the transient electromagnetic response character of mine water-bearing structure is studied,which provides an important basis for the improving interpretive method and advancing accuracy of detecting mine water-bearing structure.According to the similarity criterion of the physical model,the specific parameters of physical model and the corresponding correction factors are calculated.In addition,the mine water-bearing structure model and the transmitting and receiving devices are constructed;and the antenna parameters and detection abilities are comparatively analyzed.The results indicate that for the same transmitting antenna parameters,the more the turns of receiving antenna are,the stronger the received signal is;the larger the current in transmitting coil is,the stronger the received signal is.Under the same conditions,the inductive signal from the square antenna device is stronger than that of circular antenna.The physical model experiments are performed for interference characteristics of induction field from laneway space and metal body within laneway space.The results indicate when antenna lies near the side of the water-bearing structure,the received response value is the maximum.When the antenna lies away from the side of the water-bearing structure,the detecting ability is lower because of the influence of laneway space;the response values become strong for the metal(H-iron,metal netting and rail) in laneway space,but the response law of water-bearing structure is not affected.