發(fā)布時(shí)間：2018-10-31 20:30

【摘要】：煤炭是我國重要的基礎(chǔ)能源和工業(yè)原料，在國民經(jīng)濟(jì)發(fā)展中具有非常重要的戰(zhàn)略地位。我國煤炭自燃火災(zāi)也十分嚴(yán)重，國有煤礦有半數(shù)以上的礦井存在自然發(fā)火危險(xiǎn)，煤礦安全生產(chǎn)面臨的趨勢十分嚴(yán)峻。為了防治煤自燃引起的災(zāi)害，國內(nèi)外學(xué)者對煤自燃理論和井下防滅火方法進(jìn)行了研究。 本文從研究阻化泡沫防治煤自燃入手，理論研究了阻化泡沫的主要成分選擇，，利用程序升溫實(shí)驗(yàn)和紅外光譜實(shí)驗(yàn)分別從宏觀和微觀方面研究了阻化泡沫的阻化性能，并研究阻化泡沫在多孔介質(zhì)中的運(yùn)移規(guī)律，建立數(shù)值模型，對阻化泡沫在采空區(qū)內(nèi)的運(yùn)移堆積進(jìn)行模擬，并分析阻化泡沫的運(yùn)移堆積對采空區(qū)防火工作的作用。在理論和實(shí)驗(yàn)研究的基礎(chǔ)上，對阻化泡沫應(yīng)用設(shè)備及工藝進(jìn)行了研究，并在趙樓煤礦1306工作面進(jìn)行現(xiàn)場應(yīng)用，分析了應(yīng)用前后工作面氣體變化情況。研究成果對于阻化泡沫現(xiàn)場應(yīng)用和提高防滅火效率提供了理論參考。 為了得到阻化泡沫抑制煤自燃的最佳效果，論文對阻化泡沫材料的主要成分進(jìn)行了研究。利用程序升溫實(shí)驗(yàn)裝置測試了阻化泡沫對煤自燃特性參數(shù)的影響，得到了阻化泡沫作用于煤樣的阻化性能；通過傅里葉紅外光譜實(shí)驗(yàn)，研究了阻化泡沫的阻化機(jī)理，證實(shí)了阻化泡沫通過破壞煤體低溫活性結(jié)構(gòu)，生成穩(wěn)定鏈環(huán)，降低煤的自燃性能。 針對采空區(qū)空間隱蔽、現(xiàn)場觀測阻化泡沫運(yùn)移規(guī)律困難的特點(diǎn)，對阻化泡沫在多孔介質(zhì)中的運(yùn)移方式和流變特性進(jìn)行了理論研究，建立符合采空區(qū)實(shí)際情況的數(shù)值模型，模擬泡沫在采空區(qū)內(nèi)部的運(yùn)移規(guī)律，研究采空區(qū)漏風(fēng)對泡沫運(yùn)移的影響，并分析了泡沫的運(yùn)移堆積狀態(tài)對工作面防火工作的作用。 通過理論和實(shí)踐研究以及數(shù)值模擬，在趙樓煤礦1306工作面對阻化泡沫進(jìn)行了現(xiàn)場實(shí)際應(yīng)用，通過研究發(fā)泡設(shè)備及原理，確定了阻化泡沫的應(yīng)用工藝以及設(shè)備的技術(shù)參數(shù)，解決了1306工作面停采回撤期間回風(fēng)隅角附近氣體濃度持續(xù)增大的問題，取得較好的現(xiàn)場效果，充分發(fā)揮出阻化泡沫的防滅火效率。
[Abstract]:Coal is an important basic energy and industrial raw material in China, and has a very important strategic position in the development of national economy. China's coal spontaneous combustion fire is also very serious, more than half of the state-owned coal mines have the danger of spontaneous combustion, the trend of coal mine safety production is very serious. In order to prevent the disasters caused by coal spontaneous combustion, domestic and foreign scholars have studied the theory of coal spontaneous combustion and underground fire prevention and extinguishing methods. In this paper, the selection of the main components of the retarded foams is studied theoretically, and the inhibition properties of the foams are studied from the macroscopic and microscopic aspects by using the programmed temperature test and the infrared spectrum experiment, respectively, from the aspects of macroscopic and microscopic aspects. The migration law of foams in porous media is studied and numerical model is established to simulate the migration and accumulation of foams in goaf and to analyze the effect of migration and accumulation of anti-foam on fire prevention work in goaf. On the basis of theoretical and experimental research, the application equipment and technology of anti-foaming foam are studied, and the field application of 1306 face in Zhaolou Coal Mine is carried out, and the change of gas in the working face before and after application is analyzed. The research results provide a theoretical reference for the field application of foam control and the improvement of fire prevention and extinguishing efficiency. In order to obtain the best effect of inhibiting coal spontaneous combustion, the main components of the foamed materials are studied in this paper. The influence of the foams on the spontaneous combustion characteristics of coal was tested by using the temperature programmed test device, and the inhibition properties of the foams acting on the coal samples were obtained. By Fourier transform infrared spectroscopy (FTIR), the mechanism of blocking foam is studied. It is proved that the retarded foam can destroy the active structure of coal body at low temperature, form a stable chain, and reduce the spontaneous combustion performance of coal. In view of the difficulty in observing the migration law of foams in goaf space, the migration mode and rheological characteristics of foams in porous media are studied theoretically, and a numerical model is established in accordance with the actual situation in goaf. This paper simulates the law of foam migration in goaf, studies the influence of air leakage in goaf on foam migration, and analyzes the effect of foam migration and accumulation state on working face fire prevention. Based on the theoretical and practical research and numerical simulation, the field application of the anti-foaming foam in the 1306 working face of Zhaolu Coal Mine is carried out. By studying the foaming equipment and its principle, the application technology and the technical parameters of the anti-foaming foam are determined. The problem of increasing the gas concentration near the corner of return air during the stoppage and withdrawal of 1306 working face has been solved, and good field effect has been obtained, and the efficiency of preventing and extinguishing the foam has been brought into full play.
【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TD752.2

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