本文關(guān)鍵詞： 高溫礦井 耦合放熱 傳熱機理 溫度場演化規(guī)律 風(fēng)流溫度預(yù)測　出處：《遼寧工程技術(shù)大學(xué)》2014年博士論文　論文類型：學(xué)位論文

【摘要】：隨著煤炭開采向深部發(fā)展,由開采深度的增加和采掘機械化程度的提高所引起的礦井熱害問題愈來愈嚴重,已經(jīng)成為制約煤礦安全開采的難題之一。礦井的高溫環(huán)境,不僅影響礦山企業(yè)的生產(chǎn)安全和降低作業(yè)人員的工作效率,而且還危害職工的身心健康和生命安全。改善井下氣候條件,防止熱害發(fā)生,進行熱害防治理論和技術(shù)研究,已經(jīng)成為煤礦安全高效生產(chǎn)的重要任務(wù)。論文以傳熱學(xué)、流體力學(xué)、地質(zhì)學(xué)、通風(fēng)安全學(xué)、采礦學(xué)為基礎(chǔ),在熱源傳統(tǒng)分類方法的基礎(chǔ)上,按照熱源的空間尺度不同,將熱源分為點源、線源和面源；分析了原巖溫度和礦井風(fēng)流熱力學(xué)參數(shù)的測定方法,完善了礦井熱害調(diào)查方法和體系；采用Comsol Multiphysics軟件分別對巷道內(nèi)點源、線源、面源與風(fēng)流的熱交換進行了數(shù)值仿真分析,得出了不同熱源、不同位置等條件下與風(fēng)流熱交換的基本規(guī)律和巷道內(nèi)溫度場分布狀態(tài)。對礦井巷道內(nèi)的熱源分布和風(fēng)流影響因素進了行研究,建立了井下風(fēng)流壓力和溫度預(yù)測的熱力學(xué)參數(shù)計算模型,提出了沿風(fēng)流流動路線對風(fēng)流溫度進行分段迭加的預(yù)測方法；對巷道內(nèi)存在多種熱源耦合作用下風(fēng)流溫度進行數(shù)值仿真,得到了多熱源相互作用下風(fēng)流溫度場的分布狀態(tài)和演化規(guī)律；對礦井降溫技術(shù)方案采用數(shù)值仿真方法進行了優(yōu)化,結(jié)果表明,該方法能夠準確預(yù)測降溫方案后風(fēng)流的溫度,為科學(xué)準確地制定降溫方案提供依據(jù)。以東海礦生產(chǎn)工作面為例,根據(jù)實際存在的熱害問題,采用現(xiàn)場測試、理論分析等方法,對工作面進行了熱源解析,提出了降溫技術(shù)方案,并采用計算機仿真對降溫方案進行優(yōu)化和溫度預(yù)測,將預(yù)測結(jié)果與實際應(yīng)用效果進行了比較,表明該方法可以用于確定實際礦井降溫方案。
[Abstract]:With the development of coal mining to the deep, the problem of thermal damage caused by the increase of mining depth and mechanization of mining is becoming more and more serious, which has become one of the difficult problems restricting the safe mining of coal mine. It not only affects the production safety of mining enterprises and reduces the working efficiency of workers, but also endangers the health of workers and the safety of their lives. The paper is based on heat transfer, fluid mechanics, geology, ventilation safety, mining science, based on the traditional classification method of heat source, according to the space scale of heat source. The heat source is divided into point source, line source and non-point source, the measuring method of original rock temperature and thermodynamic parameters of mine air flow is analyzed, and the investigation method and system of mine thermal hazard are improved. The point source and line source in roadway are analyzed by Comsol Multiphysics software. The heat exchange between the surface source and the air flow is analyzed numerically, and different heat sources are obtained. The basic rules of heat exchange with air flow and the distribution of temperature field in roadway under different positions are studied. The distribution of heat source and the influencing factors of air flow in mine roadway are studied. The calculation model of thermodynamic parameters for the prediction of air flow pressure and temperature is established, and the prediction method of superposition of air flow temperature along the air flow route is put forward. Numerical simulation of air flow temperature under the coupling of multiple heat sources in roadway is carried out, and the distribution state and evolution law of air flow temperature field under the interaction of multiple heat sources are obtained, and the numerical simulation method is used to optimize the mine cooling technology scheme. The results show that the method can accurately predict the air flow temperature after the cooling scheme, and provide the basis for the scientific and accurate formulation of the cooling scheme. Taking the Donghai Coal Mine production face as an example, according to the actual thermal hazard problem, the field test is carried out. Based on the theoretical analysis and other methods, the heat source of the working face is analyzed, and the technical scheme of cooling is put forward, and the optimization and temperature prediction of the cooling scheme are carried out by computer simulation, and the results are compared with the actual application results. It shows that this method can be used to determine the actual mine cooling scheme.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2014
【分類號】：TD727.2

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本文編號：1545677