本文選題：自燃火災(zāi)　切入點(diǎn)：煙氣流動(dòng)　出處：《中北大學(xué)》2014年碩士論文

【摘要】：煤礦火災(zāi)是煤礦五大災(zāi)害之一，它不僅燒毀大量的煤炭資源，還造成人員傷亡和經(jīng)濟(jì)損失，嚴(yán)重影響了煤礦的安全生產(chǎn)。煤礦發(fā)生火災(zāi)后會(huì)產(chǎn)生有毒有害氣體和大量熱量，并形成火風(fēng)壓。風(fēng)流在火災(zāi)動(dòng)力的作用下，容易發(fā)生狀態(tài)紊亂，從而造成巨大的損失。自燃火災(zāi)占所有煤礦火災(zāi)的70%以上。因此，研究煤礦自燃火災(zāi)，對(duì)于煤礦的安全生產(chǎn)以及社會(huì)的穩(wěn)定有著重要的意義。另外，根據(jù)煤礦工作面的實(shí)際情況，研究自燃火災(zāi)的綜合防治技術(shù)，對(duì)制訂合適的防滅火方案，快速高效的火災(zāi)防治也有著重大意義。 研究煤礦自燃火災(zāi)煙氣流動(dòng)是認(rèn)識(shí)礦井自燃火災(zāi)規(guī)律、建立預(yù)測(cè)理論、開發(fā)防治技術(shù)的基礎(chǔ)。本文通過分析自燃火災(zāi)煙氣發(fā)生、發(fā)展過程的規(guī)律，建立了自燃火災(zāi)時(shí)期煙氣流動(dòng)的的數(shù)學(xué)模型和物理模型。本文利用CFX軟件設(shè)置邊界條件和初始參數(shù)，模擬火災(zāi)煙氣流動(dòng)，分析通風(fēng)條件對(duì)煙氣流動(dòng)的影響，得出以下結(jié)論：煤礦發(fā)生自燃火災(zāi)后，在沒有通風(fēng)的情況下，燃燒產(chǎn)生的煙氣會(huì)對(duì)稱流動(dòng)，從中間往兩側(cè)同時(shí)流動(dòng)；在有通風(fēng)的條件下，隨著風(fēng)速的增加，煙氣向風(fēng)流入口處流動(dòng)的速度減慢，直至不流動(dòng)。 本文還以某煤礦的綜放工作面為對(duì)象研究了自燃火災(zāi)的綜合防治技術(shù)。結(jié)合工作面的實(shí)際情況，，根據(jù)煤樣升溫氧化實(shí)驗(yàn)結(jié)果，決定加強(qiáng)工作面自燃發(fā)火預(yù)測(cè)預(yù)報(bào)，采用注氮和灌漿為主，阻化劑防火和氮?dú)馀菽瓬缁鸬燃夹g(shù)相結(jié)合的自燃綜合防治技術(shù)，以防治綜放工作面自燃發(fā)火，也為極軟、高瓦斯突出、易自燃特厚煤層的自燃火災(zāi)防治提供了一定的經(jīng)驗(yàn)。
[Abstract]:Coal mine fire is one of the five major disasters in coal mine. It not only burns a large number of coal resources, but also causes casualties and economic losses, which seriously affects the safety of coal mine production. Under the action of fire power, wind flow is prone to state disorder, resulting in huge loss. Spontaneous combustion fire accounts for more than 70% of all coal mine fires. Therefore, the study of coal mine spontaneous combustion fire, In addition, according to the actual situation of coal mining face, the comprehensive prevention and control technology of spontaneous combustion fire is studied, and the appropriate fire prevention and extinguishing scheme is made, which is of great significance to the safety production of coal mine and the stability of society. Rapid and efficient fire prevention is also of great significance. The study of spontaneous combustion smoke flow in coal mine is the basis of understanding the law of mine spontaneous combustion fire, establishing prediction theory and developing prevention and control technology. This paper analyzes the law of the occurrence and development process of spontaneous combustion fire smoke. The mathematical and physical models of flue gas flow during spontaneous combustion fire are established. In this paper, the boundary conditions and initial parameters are set up by using CFX software to simulate the smoke flow, and the influence of ventilation conditions on flue gas flow is analyzed. The following conclusions are drawn: after the spontaneous combustion fire occurs in a coal mine, the smoke generated by combustion will flow symmetrically from the middle to the two sides without ventilation, and under the condition of ventilation, with the increase of the wind speed, The flow of smoke to the inlet of the wind flow slowed until it did not flow. This paper also studies the comprehensive prevention and control technology of spontaneous combustion fire in a fully mechanized caving face of a coal mine. According to the actual situation of the working face and the experimental results of coal sample heating and oxidation, it is decided to strengthen the prediction and prediction of spontaneous combustion combustion in the working face. The integrated prevention and control technology of spontaneous combustion is adopted, which is composed of nitrogen injection and grouting, fire prevention of chemical inhibitor and fire extinguishing by nitrogen foam, so as to prevent spontaneous combustion in fully mechanized caving face, which is also very soft and high gas outburst. The self-ignition fire prevention and control of easy self-ignition thick coal seam provides certain experience.
【學(xué)位授予單位】：中北大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TD753

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