【摘要】：采空區(qū)漏風(fēng)的危害很多，風(fēng)流中攜帶一定量的氧氣，能夠促進(jìn)遺煤的自燃，引發(fā)火災(zāi)；易產(chǎn)生瓦斯積聚，引發(fā)瓦斯災(zāi)害；使有效風(fēng)流減少，這些無疑威脅著井下的安全生產(chǎn)及工人的生命安全。 本文將采空區(qū)簡化為各向同性的多孔介質(zhì)模型；然后根據(jù)流體力學(xué)理論，多孔介質(zhì)流體力學(xué)理論及滲流力學(xué)等相關(guān)理論，運(yùn)用fluent模擬軟件對紅廟礦三源兩匯采空區(qū)漏風(fēng)流場分布規(guī)律進(jìn)行模擬并對采空區(qū)進(jìn)行自燃“三帶”劃分，經(jīng)判斷得到采空區(qū)無遺煤自燃危險性，同時，對模擬結(jié)果進(jìn)行比較，，得出多源多匯采空區(qū)在不同高度范圍的“三帶”分布，以及不僅采空區(qū)水平方向上可能具有遺煤自燃危險性，在一定的空間高度范圍內(nèi)也可能存在此種危險的特點(diǎn)。 通過改變模擬參數(shù)，對漏風(fēng)流場進(jìn)行預(yù)測分析研究，可以得到，漏風(fēng)量的大小對采空區(qū)自燃“三帶”有影響，且當(dāng)漏風(fēng)源和漏風(fēng)匯位置和數(shù)目不變時，隨著漏風(fēng)量的增大，氧化帶也隨之變寬；在漏風(fēng)量一定的情況下，漏風(fēng)源或漏風(fēng)匯的數(shù)目對采空區(qū)三帶也有影響，漏風(fēng)源或漏風(fēng)匯距離工作面越遠(yuǎn)時，氧化帶寬度越大。對進(jìn)一步掌握采空區(qū)內(nèi)存在遺煤自然氧化的區(qū)域及礦井自然火災(zāi)的防治具有重要意義。
[Abstract]:There are many hazards of air leakage in goaf, the air flow carries a certain amount of oxygen, can promote the spontaneous combustion of coal, cause fire, easy to produce gas accumulation, cause gas disaster, reduce the effective air flow, These undoubtedly threaten the safety of underground production and the safety of workers. In this paper, the goaf is simplified as an isotropic porous media model, and then according to the theory of fluid mechanics, the theory of fluid mechanics of porous media and the theory of seepage mechanics, etc. Using fluent simulation software, the distribution of air leakage field in the three sources and two sinks of Hongmiao Mine is simulated, and the "three zones" of spontaneous combustion of the goaf are divided, and the danger of coal spontaneous combustion in the goaf is obtained by judging. At the same time, the simulation results are compared. It is concluded that the distribution of "three zones" in different height ranges in the goaf with multiple sources and multiple sinks, and that there may not only be the danger of coal spontaneous combustion in the horizontal direction of the goaf, but also that such danger may exist in a certain space height range. By changing the simulation parameters and analyzing the air leakage field, it can be concluded that the magnitude of air leakage has an effect on the "three zones" of spontaneous combustion in goaf, and when the position and number of air leakage source and sink are constant, the air leakage increases with the increase of air leakage. At the same time, the number of air leakage source or air leakage sink also affects the third zone of goaf. The farther the air leakage source or sink is from the face, the wider the oxidation zone is. It is of great significance to further understand the natural oxidation of coal in the goaf and the prevention and control of the natural fire in the mine.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TD75

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