本文選題：煤自燃 + 自燃“三帶”��； 參考：《西安科技大學(xué)》2013年碩士論文

【摘要】：我國(guó)的煤炭資源非常豐富，煤自燃程度卻非常嚴(yán)重，這不僅影響了煤礦的安全生產(chǎn)，而且造成了大量煤炭資源的浪費(fèi)。任家莊煤礦11306工作面斷層較多，地質(zhì)條件復(fù)雜，煤層自然發(fā)火期短，自燃傾向性高，煤層含有瓦斯，煤塵具有爆炸性，一旦發(fā)生煤自燃災(zāi)害，將會(huì)造成嚴(yán)重的危害。因此，本文研究重點(diǎn)就是該工作面煤層的自然發(fā)火規(guī)律及相應(yīng)的預(yù)報(bào)、預(yù)防措施。 通過(guò)對(duì)采空區(qū)煤自燃“三帶”理論的分析，，研究了煤的氧化自燃過(guò)程，得出了采空區(qū)“三帶”劃分的指標(biāo)，總結(jié)出綜采面煤層自燃的特點(diǎn)及規(guī)律。 通過(guò)煤自然發(fā)火實(shí)驗(yàn)研究，得出了11306煤層的煤自燃特性參數(shù)：浮煤厚度、氧氣濃度、漏風(fēng)強(qiáng)度，并且得出了該煤層最短自然發(fā)火期為65天。 通過(guò)對(duì)11306工作面采空區(qū)現(xiàn)場(chǎng)觀測(cè)，得出了該工作面實(shí)際的推進(jìn)速度以及采空區(qū)的浮煤厚度、氧氣濃度、CO濃度及漏風(fēng)強(qiáng)度，并結(jié)合煤自然發(fā)火實(shí)驗(yàn)的結(jié)果，最終得出了該采空區(qū)“三帶”劃分范圍，確定了自燃危險(xiǎn)區(qū)域和極限推進(jìn)速度。 基于11306工作面煤自然升溫實(shí)驗(yàn)和現(xiàn)場(chǎng)觀測(cè)的指標(biāo)參數(shù)，用Fluent軟件對(duì)其采空區(qū)內(nèi)部的氧濃度場(chǎng)及壓力場(chǎng)進(jìn)行了相似模擬，并根據(jù)11306工作面煤層的自燃特點(diǎn)及規(guī)律，建立了以溫度與指標(biāo)氣體監(jiān)測(cè)為主的煤自然發(fā)火早期預(yù)報(bào)體系，并提出了以黃泥灌漿與注氮為主的防滅火措施。
[Abstract]:China's coal resources are very rich, but the degree of coal spontaneous combustion is very serious, which not only affects the safety of coal production, but also causes a large amount of waste of coal resources. There are many faults in No. 11306 face of Renjiazhuang Coal Mine, complicated geological conditions, short spontaneous combustion period, high spontaneous combustion tendency, gas in coal seam and explosive coal dust. Once coal spontaneous combustion disaster occurs, it will cause serious harm. Therefore, the research emphasis of this paper is the spontaneous combustion law of the coal seam and the corresponding prediction and prevention measures. Based on the analysis of the theory of "three zones" of coal spontaneous combustion in goaf, the process of coal oxidation spontaneous combustion is studied, the index of "three zones" division in goaf is obtained, and the characteristics and rules of spontaneous combustion of coal seam in fully mechanized coal face are summarized. Through the experimental study of coal spontaneous combustion, the coal spontaneous combustion characteristic parameters of 11306 coal seam are obtained: the thickness of floating coal, the concentration of oxygen, the air leakage intensity, and the shortest spontaneous combustion period of this coal seam is 65 days. Based on the field observation of goaf of 11306 face, the actual speed of advance, the thickness of floating coal, the concentration of CO and the intensity of air leakage in goaf are obtained, and the results of coal spontaneous combustion experiment are also given. Finally, the "three zones" of the goaf are divided, and the danger zone of spontaneous combustion and the limit propelling speed are determined. Based on the coal natural heating test and field observation index parameters of 11306 working face, the oxygen concentration field and pressure field in the goaf are simulated by fluent software, and according to the spontaneous combustion characteristics and rules of coal seam in 11306 working face, the oxygen concentration field and pressure field in the goaf are simulated by fluent software. The early prediction system of coal spontaneous combustion is established, which is based on temperature and index gas monitoring, and the fire prevention and extinguishing measures based on yellow mud grouting and nitrogen injection are put forward.
【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TD75

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