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

【摘要】：本文采用理論分析、實(shí)驗(yàn)室試驗(yàn)、數(shù)值模擬和現(xiàn)場應(yīng)用相結(jié)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(shè)計(jì)了低頻磁棒天線并實(shí)測了其敏感頻帶和有效接收范圍，結(jié)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(jìn)行了監(jiān)測和定位的應(yīng)用。在相關(guān)研究成果的基礎(chǔ)上，建立了接近煤礦井下實(shí)際的平板波導(dǎo)傳播模型，建立了煤巖低頻電磁信號穿透煤層實(shí)驗(yàn)系統(tǒng)，設(shè)計(jì)了低頻磁棒天線并進(jìn)行了性能測試；在頻率變化、強(qiáng)度變化下對不同粒度的煤樣進(jìn)行了穿透實(shí)驗(yàn)，并與自由空間衰減規(guī)律進(jìn)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(jìn)工作面電磁信號的衰減分布進(jìn)行了模擬，直觀地分析了突出源不同位置、不同強(qiáng)度和不同頻率下電磁信號的衰減分布規(guī)律。結(jié)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(jìn)行了爆破時(shí)電磁信號異常監(jiān)測和突出源定位的應(yīng)用。本文創(chuàng)新性地用低頻電磁信號來預(yù)測煤與瓦斯突出，并初步在現(xiàn)場進(jìn)行應(yīng)用，為煤礦井下動(dòng)力災(zāi)害防治提供理論和技術(shù)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(xué)位授予單位】：中國礦業(yè)大學(xué)（北京）
【學(xué)位級別】：博士
【學(xué)位授予年份】：2014
【分類號】：TD713

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