本文關(guān)鍵詞： 瓦斯抽采 鉆孔參數(shù) 數(shù)值模擬 結(jié)果分析 應(yīng)用技術(shù)　出處：《遼寧工程技術(shù)大學(xué)》2014年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：采煤過(guò)程中的瓦斯問(wèn)題一直困擾著煤礦的安全生產(chǎn),因而對(duì)采煤過(guò)程中瓦斯問(wèn)題的研究是保證煤礦安全生產(chǎn)的重要內(nèi)容。煤層預(yù)抽這一措施是目前認(rèn)為的對(duì)生產(chǎn)安全最有效的措施,如何提高抽采效率一直都是國(guó)內(nèi)外研究的重點(diǎn)。本文首先從滲流理論、擴(kuò)散理論、流體力學(xué)及計(jì)算流體力學(xué)進(jìn)行了理論分析,其次根據(jù)實(shí)際情況做了假設(shè)條件和建立的模擬模型,最后針對(duì)回采工作面的順煤層瓦斯抽放鉆孔進(jìn)行了數(shù)值模擬,分析了在抽放過(guò)程中不同參數(shù)對(duì)抽采效果的影響,給實(shí)際生產(chǎn)操作提供一定的理論參考。山西襄礦集團(tuán)晉平煤業(yè)因?yàn)橥咚箚?wèn)題使得生產(chǎn)受到了困擾,建立了瓦斯抽采系統(tǒng)。本文對(duì)晉平煤業(yè)3#煤層105、107工作面的抽采系統(tǒng)進(jìn)行數(shù)據(jù)采集,建立了二維多孔介質(zhì)模型,利用FLUETN進(jìn)行了模擬研究。分析不同抽放孔徑、不同抽采負(fù)壓和不同煤層滲透率的情況下,鉆孔抽采的影響范圍。將模擬結(jié)果與現(xiàn)階段的抽采效果進(jìn)行比較,評(píng)價(jià)及優(yōu)化抽采系統(tǒng)布孔的合理性,并對(duì)以后的抽采計(jì)劃提供參考,增強(qiáng)生產(chǎn)的安全系數(shù),給煤礦的安全生產(chǎn)提供更多的理論依據(jù)。
[Abstract]:The gas problem in coal mining process has been puzzling the safety of coal production. Therefore, the study of gas in coal mining process is an important content to ensure the safety of coal production. The measure of coal seam pre-drainage is considered to be the most effective measure for production safety. How to improve the extraction efficiency has always been the focus of domestic and foreign research. Firstly, the theoretical analysis of seepage theory, diffusion theory, hydrodynamics and computational fluid mechanics is carried out. Secondly, according to the actual situation, the hypothetical condition and the established simulation model are made. Finally, the numerical simulation is carried out for the gas drainage borehole in the coal seam of the mining face. This paper analyzes the influence of different parameters on the extraction effect in the process of drainage, which provides a certain theoretical reference for the actual production operation. Shanxi Xiang Coal Mine Group Jinping Coal Industry is troubled by the gas problem. The gas drainage system is established. In this paper, the data of extraction system of 105,107 coal face in Jinping Coal Industry is collected, and a two-dimensional porous medium model is established. The simulation study was carried out by using FLUETN. Under the conditions of different pumping aperture, different suction negative pressure and different permeability of coal seam. Compare the simulation results with the current extraction effect, evaluate and optimize the rationality of the drainage system, and provide a reference for the future extraction plan, enhance the safety factor of production. To provide more theoretical basis for coal mine safety production.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TD712.6

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