本文選題：煤與瓦斯突出　切入點：低頻電磁信號　出處：《中國礦業(yè)大學（北京）》2014年博士論文　論文類型：學位論文

【摘要】：本文采用理論分析、實驗室試驗、數(shù)值模擬和現(xiàn)場應用相結合的方法系統(tǒng)研究了煤與瓦斯突出前兆低頻電磁信號在煤層中的傳播衰減規(guī)律，設計了低頻磁棒天線并實測了其敏感頻帶和有效接收范圍，結合工作面生產(chǎn)工藝等因素，確定了采掘工作面突出前兆電磁輻射信號的接收方法，并在現(xiàn)場進行了監(jiān)測和定位的應用。在相關研究成果的基礎上，建立了接近煤礦井下實際的平板波導傳播模型，建立了煤巖低頻電磁信號穿透煤層實驗系統(tǒng)，設計了低頻磁棒天線并進行了性能測試；在頻率變化、強度變化下對不同粒度的煤樣進行了穿透實驗，并與自由空間衰減規(guī)律進行了對比，得到了煤巖低頻率電磁信號在煤層中的衰減規(guī)律；利用CST軟件對掘進工作面電磁信號的衰減分布進行了模擬，直觀地分析了突出源不同位置、不同強度和不同頻率下電磁信號的衰減分布規(guī)律。結合采掘工作面生產(chǎn)工藝等因素確定了采掘工作面低頻電磁信號的監(jiān)測方法和天線布置方法，在現(xiàn)場利用ZDKT-1瞬變磁振監(jiān)測系統(tǒng)進行了爆破時電磁信號異常監(jiān)測和突出源定位的應用。本文創(chuàng)新性地用低頻電磁信號來預測煤與瓦斯突出，并初步在現(xiàn)場進行應用，為煤礦井下動力災害防治提供理論和技術支持。
[Abstract]:In this paper, the propagation and attenuation of low frequency electromagnetic signals of coal and gas outburst precursors in coal seam are systematically studied by means of theoretical analysis, laboratory tests, numerical simulation and field application. The low frequency magnetic rod antenna is designed, its sensitive frequency band and effective receiving range are measured, and the receiving method of outburst precursor electromagnetic radiation signal in mining face is determined by combining the production technology of working face and other factors. On the basis of the related research results, a plate waveguide propagation model approaching to the actual underground coal mine is established, and a coal rock low frequency electromagnetic signal penetrating coal seam experimental system is established. The low frequency magnetic rod antenna is designed and its performance is tested. Under the change of frequency and intensity, the penetration experiments of coal samples with different particle sizes are carried out, and the results are compared with the laws of free space attenuation. The attenuation law of low frequency electromagnetic signal of coal and rock in coal seam is obtained, the attenuation distribution of electromagnetic signal in tunneling face is simulated by CST software, and the different positions of outburst source are analyzed intuitively. The attenuation and distribution law of electromagnetic signal under different intensity and frequency. The monitoring method and antenna arrangement method of low frequency electromagnetic signal in mining face are determined by combining the production technology of mining face and so on. In this paper, the ZDKT-1 transient magnetic vibration monitoring system is used to monitor the electromagnetic signal anomaly and locate the outburst source during blasting. In this paper, the low frequency electromagnetic signal is innovatively used to predict coal and gas outburst, and preliminary application is made in the field. To provide theoretical and technical support for underground power disaster prevention and control.
【學位授予單位】：中國礦業(yè)大學（北京）
【學位級別】：博士
【學位授予年份】：2014
【分類號】：TD713

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