發(fā)布時(shí)間：2018-05-29 16:57

  本文選題：多孔介質(zhì) + 瓦斯運(yùn)移��； 參考：《河北工程大學(xué)》2013年碩士論文

【摘要】：采空區(qū)瓦斯是影響煤礦安全生產(chǎn)的主要危險(xiǎn)因素之一，采空區(qū)瓦斯的防治工作是煤礦安全工作的重中之重，事實(shí)證明相似材料實(shí)驗(yàn)和計(jì)算機(jī)數(shù)值模擬為工作面采空區(qū)瓦斯防治工作的開展提供了重要的技術(shù)手段。本文系統(tǒng)總結(jié)了工作面采空區(qū)流場和瓦斯運(yùn)移規(guī)律國內(nèi)外研究成果，研究成果表明，影響采空區(qū)流場分布和瓦斯運(yùn)移的主要因素是通風(fēng)條件、采空區(qū)孔隙率、來壓步距等�；诖耍疚牟捎孟嗨撇牧蠈�(shí)驗(yàn)和數(shù)值模擬相結(jié)合的研究方法，系統(tǒng)研究分析了通風(fēng)風(fēng)速條件、采空區(qū)孔隙率取值和來壓步距對綜采工作面采空區(qū)流場和瓦斯運(yùn)移規(guī)律的影響。 本文采用理論分析、實(shí)驗(yàn)室相似材料模擬、以及計(jì)算機(jī)數(shù)值模擬相結(jié)合的研究方法，利用計(jì)算流體力學(xué)、多孔介質(zhì)、滲流力學(xué)等基本理論建立綜采工作面采空區(qū)瓦斯?jié)B流數(shù)學(xué)模型，利用FLUENT軟件建立了綜采面采空區(qū)瓦斯?jié)B流的三維數(shù)值模型。首先對不同通風(fēng)條件下孔隙率均勻分布時(shí)采空區(qū)流場和自燃“三帶”分布進(jìn)行了實(shí)驗(yàn)室相似材料模擬，然后利用FLUENT流體力學(xué)軟件對不同通風(fēng)風(fēng)速條件、不同采空區(qū)孔隙率取值和不同來壓步距情況下的采空區(qū)風(fēng)流場、瓦斯運(yùn)移規(guī)律以及自燃“三帶”分布寬度進(jìn)行了數(shù)值模擬研究，對比分析了不同能通風(fēng)風(fēng)速條件、不同采空區(qū)孔隙率取值和不同來壓步距情況下綜采工作面采空區(qū)流場與瓦斯分布規(guī)律，為正確認(rèn)識采空區(qū)流場和瓦斯運(yùn)移規(guī)律提供了理論依據(jù)。最后根據(jù)山西某礦0401綜采工作面的具體數(shù)據(jù)資料對現(xiàn)實(shí)條件下的綜采工作面采空區(qū)流場和瓦斯運(yùn)移規(guī)律進(jìn)行了數(shù)值模擬，，為0401綜采工作面和其他綜采工作面采空區(qū)瓦斯防治工作提供理論依據(jù)和指導(dǎo)意義，對煤礦安全工作面的開展和研究具有重要的指導(dǎo)意義，同時(shí)對深入認(rèn)識綜采工作面采空區(qū)風(fēng)流流場和瓦斯運(yùn)移分布規(guī)律也有一定的理論價(jià)值。
[Abstract]:The gas in goaf is one of the main risk factors affecting the safety of coal mine. The prevention and control of gas in goaf is the most important work in the safety of coal mine. It is proved that the experiment of similar materials and computer numerical simulation provide important technical means for gas prevention and control in goaf of working face. This paper systematically summarizes the domestic and international research results of the flow field and gas migration law in the goaf of the working face. The research results show that the main factors affecting the distribution of the flow field and the gas migration in the goaf are the ventilation condition, the porosity of the goaf, the pressure step distance and so on. Based on this, the effects of ventilation wind speed, porosity of goaf and pressure step on the flow field and gas migration in goaf of fully mechanized mining face are studied systematically by using the method of similar material experiment and numerical simulation. In this paper, theoretical analysis, simulation of similar materials in laboratory, and numerical simulation of computer are used to study, using computational fluid dynamics, porous media, The mathematical model of gas seepage in goaf of fully mechanized mining face is established by the basic theory of seepage mechanics, and the three-dimensional numerical model of gas seepage in goaf of fully mechanized mining face is established by using FLUENT software. The flow field of goaf and the distribution of "three zones" of spontaneous combustion under different ventilation conditions are simulated by similar materials in the laboratory, and then the different ventilation and wind speed conditions are simulated by FLUENT fluid mechanics software. The air flow field, gas migration law and distribution width of "three zones" of spontaneous combustion in different goaf air flow field and different pressure step distance are numerically simulated, and the conditions of different ventilation wind speed are compared and analyzed. The flow field and gas distribution law of goaf in fully mechanized mining face under the condition of different goaf porosity and different pressure step distance provide a theoretical basis for correctly understanding the flow field and gas migration law in goaf. Finally, according to the specific data of 0401 fully mechanized mining face of a certain mine in Shanxi Province, the flow field and gas migration law in goaf of fully mechanized mining face under realistic conditions are numerically simulated. It provides theoretical basis and guiding significance for gas prevention and control work in goaf of 0401 fully mechanized coal face and other fully mechanized coal mining faces, and has important guiding significance for the development and research of coal mine safety working face. At the same time, it has certain theoretical value to deeply understand the air flow field and gas migration distribution law in goaf of fully mechanized mining face.
【學(xué)位授予單位】：河北工程大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TD712

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