本文選題：遺煤自燃　切入點(diǎn)：數(shù)值模擬　出處：《西安科技大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著煤層賦存深度及開采強(qiáng)度的不斷加大,遺煤自燃引發(fā)瓦斯爆炸的燃爆耦合災(zāi)害日漸凸顯。本文以崔家溝煤礦2207綜采工作面采空區(qū)為研究對象,通過現(xiàn)場實(shí)測、數(shù)值模擬及理論分析的方法,研究高瓦斯易自燃煤層采空區(qū)燃爆耦合危險(xiǎn)區(qū)域及災(zāi)害危險(xiǎn)性,為礦井的災(zāi)害防治提供依據(jù)。在采空區(qū)現(xiàn)場布置測點(diǎn),束管監(jiān)測采空區(qū)兩道遺煤內(nèi)的氧氣及瓦斯?jié)舛茸兓?結(jié)合相應(yīng)的漏風(fēng)強(qiáng)度劃分采空區(qū)三帶,得出正常推進(jìn)情況下,氧化升溫帶在采空區(qū)兩道處較寬,在采空區(qū)中部由進(jìn)風(fēng)側(cè)的36m寬縮至回風(fēng)側(cè)的25m寬,且采空區(qū)無自然發(fā)火危險(xiǎn)。利用FLUENT軟件模擬采空區(qū)流場分布,雙指標(biāo)劃分采空區(qū)三帶并與現(xiàn)場實(shí)測的三帶結(jié)果進(jìn)行比對,得出數(shù)值模擬具有一定的可靠性,其氧化升溫帶及瓦斯?jié)舛葓龅姆植伎捎糜谥笇?dǎo)現(xiàn)場的災(zāi)害防治工作;分析了供風(fēng)量對采空區(qū)三帶分布的影響,得出隨著供風(fēng)量的增大,氧化升溫帶逐漸遠(yuǎn)離工作面,但其分布范圍不斷擴(kuò)大。從煤自燃和瓦斯爆炸的發(fā)生條件入手,對采空區(qū)燃爆耦合災(zāi)害的致災(zāi)機(jī)理進(jìn)行了進(jìn)一步探討,并在判定耦合危險(xiǎn)區(qū)域的基礎(chǔ)上,提出引入溫度場對耦合區(qū)域的危險(xiǎn)性進(jìn)行分析;應(yīng)用數(shù)值模擬的氧化升溫帶及瓦斯?jié)舛确植冀Y(jié)果,劃分不同供風(fēng)量下的采空區(qū)燃爆耦合危險(xiǎn)區(qū)域,得出耦合危險(xiǎn)區(qū)域分布的寬度和廣度隨供風(fēng)量的增加而增大;以崔家溝礦2207工作面的燃爆耦合危險(xiǎn)區(qū)域?yàn)榛A(chǔ),引入現(xiàn)場和實(shí)驗(yàn)溫度變化數(shù)據(jù),分析得到大約在工作面停采后第14天時(shí),極可能發(fā)生采空區(qū)燃爆耦合災(zāi)害,應(yīng)及時(shí)采取防控措施。本文以現(xiàn)場實(shí)測為基礎(chǔ),綜合應(yīng)用數(shù)值模擬、理論分析,判定采空區(qū)燃爆耦合危險(xiǎn)區(qū)域及其危險(xiǎn)性的方法與研究得出的結(jié)果,能夠?yàn)楦咄咚挂鬃匀济簩硬煽諈^(qū)燃爆耦合災(zāi)害提供治理依據(jù)。
[Abstract]:With the increasing of coal seam occurrence depth and mining intensity, the coupling disaster of gas explosion caused by coal spontaneous combustion is becoming more and more prominent. This paper takes the goaf of Cuijiagou coal mine 2207 fully mechanized mining face as the research object, through the field measurement, By numerical simulation and theoretical analysis, the coupling hazard area and disaster risk of goaf in goaf of high gas spontaneous combustion coal seam are studied in order to provide basis for disaster prevention and control of mine. By monitoring the change of oxygen and gas concentration in two coals in the goaf, combining with the corresponding air leakage intensity, the paper divides the three zones of goaf into three zones, and concludes that under normal propulsion, the oxidation heating zone is wider in the two channels of the goaf. In the middle of the goaf, the width of the goaf is reduced from 36 m wide to 25 m width of the return wind side, and there is no spontaneous combustion hazard in the goaf. The distribution of the flow field in the goaf is simulated by FLUENT software, and the three zones of goaf are divided by two indexes and compared with the measured results of the three zones in the field. It is concluded that the numerical simulation has certain reliability, and the distribution of oxidation heating zone and gas concentration field can be used to guide the disaster prevention and control work on the spot, and the influence of air supply on the distribution of three zones in goaf is analyzed, and the results show that the distribution of air supply increases with the increase of air supply. The oxidation heating zone is gradually far away from the working face, but its distribution range is expanding continuously. From the conditions of spontaneous combustion of coal and gas explosion, the mechanism of coupling disaster caused by combustion and explosion in goaf is further discussed. On the basis of determining the coupling dangerous area, the paper puts forward that the temperature field is introduced to analyze the hazard of the coupling region, and the results of oxidation heating zone and gas concentration distribution are applied to the numerical simulation. The distribution width and width of the coupling hazard area are obtained by dividing the coupling dangerous area of goaf under different air supply rate with the increase of air supply, and based on the coupling dangerous area of Cuijiagou coal mine 2207 working face. By introducing the field and experimental temperature variation data, it is obtained that the coupling disaster of combustion and explosion in goaf is likely to occur on the 14th day after the mining stoppage at the working face, and the preventive and control measures should be taken in time. In this paper, based on the field measurement, the numerical simulation is applied synthetically. The theoretical analysis, the method and the research result of judging the dangerous area and the danger of the coupling of explosion and combustion in the goaf can provide the control basis for the coupling disaster of the combustion and explosion in the goaf of the coal seam with high gas easily spontaneous combustion.
【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TD752.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王海賓;侯國培;褚翔宇;;唐口煤礦采空區(qū)瓦斯與火耦合災(zāi)害綜合治理技術(shù)研究[J];煤炭技術(shù);2016年07期

2 裴曉東;張人偉;馬偉南;;高瓦斯易自燃采空區(qū)瓦斯與煤自燃耦合模擬研究[J];煤炭科學(xué)技術(shù);2016年04期

3 程衛(wèi)民;張孝強(qiáng);王剛;楊鑫祥;辛林;;綜放采空區(qū)瓦斯與遺煤自燃耦合災(zāi)害危險(xiǎn)區(qū)域重建技術(shù)[J];煤炭學(xué)報(bào);2016年03期

4 周西華;門金龍;李誠玉;宋東平;劉振嶺;張樹嶺;;綜放孤島工作面采空區(qū)自燃與爆炸危險(xiǎn)區(qū)監(jiān)測及數(shù)值模擬[J];安全與環(huán)境學(xué)報(bào);2016年01期

5 陳沖沖;張學(xué)博;閆潮;;采空區(qū)瓦斯涌出源位置對瓦斯分布影響的數(shù)值模擬[J];安全與環(huán)境學(xué)報(bào);2015年05期

6 高建良;王立峰;劉明信;;采空區(qū)瓦斯涌出源位置對瓦斯?jié)舛燃白匀紟Х植嫉挠绊慬J];安全與環(huán)境學(xué)報(bào);2015年02期

7 羅俊峰;蔣仲安;王洪勝;張中意;;U+I型通風(fēng)下采空區(qū)瓦斯運(yùn)移規(guī)律的數(shù)值模擬[J];現(xiàn)代礦業(yè);2015年03期

8 李樹剛;安朝峰;潘宏宇;林海飛;丁洋;;采空區(qū)煤自燃引發(fā)瓦斯爆炸致災(zāi)機(jī)理及防控技術(shù)[J];煤礦安全;2014年12期

9 張培鵬;蔣金泉;秦廣鵬;武泉林;許麗娜;;堅(jiān)硬頂板垮落誘發(fā)瓦斯爆燃機(jī)理及預(yù)防[J];采礦與安全工程學(xué)報(bào);2014年05期

10 楊勝強(qiáng);秦毅;孫家偉;蔣春林;倫嘉云;;高瓦斯易自燃煤層瓦斯與自燃復(fù)合致災(zāi)機(jī)理研究[J];煤炭學(xué)報(bào);2014年06期

相關(guān)博士學(xué)位論文 前3條

1 曹凱;綜放采空區(qū)遺煤自然發(fā)火規(guī)律及高效防治技術(shù)[D];中國礦業(yè)大學(xué);2013年

2 車強(qiáng);采空區(qū)氣體三維多場耦合規(guī)律研究[D];中國礦業(yè)大學(xué)（北京）;2010年

3 文虎;煤自燃過程的實(shí)驗(yàn)及數(shù)值模擬研究[D];西安科技大學(xué);2003年

相關(guān)碩士學(xué)位論文 前5條

1 趙穎杰;煤礦采空區(qū)火源點(diǎn)定位方法及應(yīng)用研究[D];中國礦業(yè)大學(xué);2015年

2 張紅升;采空區(qū)流場與瓦斯運(yùn)移規(guī)律數(shù)值模擬研究[D];河北工程大學(xué);2013年

3 馮普金;Y型通風(fēng)回采工作面采空區(qū)流場和瓦斯分布規(guī)律研究[D];河南理工大學(xué);2012年

4 陳晉;綜放采場“O”形圈內(nèi)瓦斯運(yùn)移規(guī)律研究[D];太原理工大學(xué);2011年

5 汪長明;地面鉆孔抽采條件下半封閉采空區(qū)瓦斯運(yùn)移及分布規(guī)律研究[D];煤炭科學(xué)研究總院;2007年

，

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