本文選題：綜放工作面采空區(qū) + 注氮防滅火��； 參考：《安徽理工大學》2013年碩士論文

【摘要】：煤在自然界的自燃現(xiàn)象是一直客觀存在的。礦井火災伴隨的有毒有害氣體還將可能引起礦井的瓦斯爆炸,對井下工作人員以及生產(chǎn)設備構成嚴重的安全威脅。煤體自燃同時會致使煤炭資源的大量浪費,并導致環(huán)境惡化,從而帶來人員的傷亡和龐大的經(jīng)濟損失,尤其是近些年,隨著綜合機械化采煤技術的發(fā)展,礦井的開采強度不斷增強,采空區(qū)的范圍也隨之增大,通風系統(tǒng)也變得更加復雜,致使煤體自燃火災最能成為影響煤礦生產(chǎn)安全的主要災害之一。據(jù)資料分析,全國重點煤礦與統(tǒng)配煤礦中,自燃火災的次數(shù)占整個礦井火災總次數(shù)的90%以上,其中發(fā)生遺煤自燃的采空區(qū)火災占總火災次數(shù)近60%,因此,井下采空區(qū)是自燃火災發(fā)生的主要區(qū)域。 本文以正行煤礦1504工作面綜放采空區(qū)遺煤量多、遺煤易自燃、冒落高度大以及工作面推進速度慢等因素為背景,對采空區(qū)進行了注氮惰化氧化帶防滅火措施,建立了注氮防滅火以及束管檢測的完整防滅火體系。首先,通過采集14、15煤的煤樣,運用熱分析實驗以及程序升溫氧化實驗,得出14、15煤在不同水分和粒徑條件下的放熱量與吸氧量隨溫度變化的規(guī)律,以及14、15煤在低溫氧化條件下的氣體生成規(guī)律,并優(yōu)選CO與C2H4作為采空區(qū)煤體自燃的指標性氣體。其次,結合以往的注氮工藝經(jīng)驗,采用上隅角埋管式的注氮工藝,并通過fluent數(shù)值模擬,確定了最佳注氮口位置,應將注氮口安設在深入采空區(qū)20m的位置,指導了現(xiàn)場注氮以及束管檢測系統(tǒng)的建立。接著,運用matlab軟件結合數(shù)值分析,對采空區(qū)注氮前后的各種氣體含量做了精確處理,并采用有限的數(shù)據(jù)反演出注氮前的三帶范圍,以及：matlab三維成像技術,直觀的得出了采空區(qū)氣體分布規(guī)律,確定了三帶前后的變化寬度,劃分出了采空區(qū)危險性區(qū)域,最終對注氮效果進行了評價,及時反饋、調(diào)整各注氮參數(shù),完善了采空區(qū)注氮防滅火系統(tǒng)。
[Abstract]:The spontaneous combustion of coal in nature has always existed objectively. The poisonous and harmful gas associated with mine fire may also cause gas explosion in the mine and pose a serious safety threat to underground workers and production equipment. Spontaneous combustion of coal will also cause a large amount of waste of coal resources, and lead to environmental deterioration, resulting in casualties and huge economic losses, especially in recent years, with the development of comprehensive mechanized coal mining technology, With the increasing mining intensity, the scope of the goaf increases, and the ventilation system becomes more complex, which makes the spontaneous combustion of coal body fire the most important disaster affecting the safety of coal production. According to the analysis of data, the number of spontaneous fire in key coal mines and integrated coal mines in China accounts for more than 90% of the total number of fires in the whole mine, in which the number of fires in the goaf where spontaneous combustion of coal remains accounts for nearly 60% of the total number of fires. Underground goaf is the main area of spontaneous combustion fire. Based on the factors such as the large amount of coal left in the fully mechanized caving goaf of No. 1504 face of Zhenghang Coal Mine, the easy spontaneous combustion of the remaining coal, the large height of the caving and the slow speed of the working face, the measures of preventing and extinguishing the fire in the goaf with nitrogen inert oxidation zone are carried out in this paper. A complete fire extinguishing system with nitrogen injection and beam tube detection was established. First of all, by collecting coal samples of 14Y15 coal, using thermal analysis experiment and temperature programmed oxidation experiment, the variation of heat release and oxygen absorption with temperature under different water and particle size conditions is obtained. The gas formation law of 14Y15 coal under the condition of low temperature oxidation and CO and C2H4 are selected as the index gas of spontaneous combustion of coal body in goaf. Secondly, combined with the previous experience of nitrogen injection process, the upper corner burying tube nitrogen injection process was adopted, and through fluent numerical simulation, the optimum position of nitrogen injection port was determined, and the nitrogen injection port should be located at the position of 20 m deep in the goaf. The establishment of field nitrogen injection and beam tube detection system is guided. Then, by using matlab software and numerical analysis, the gas content before and after nitrogen injection in goaf is treated accurately, and the range of three bands before nitrogen injection is reversed with limited data, and the three-dimensional imaging technology of: MATLAB is used. The distribution law of gas in goaf is obtained intuitively, the width of change before and after three zones is determined, the dangerous area of goaf is divided, the effect of nitrogen injection is evaluated, the feedback is timely, and the parameters of nitrogen injection are adjusted. The system of nitrogen injection and fire extinguishing in goaf has been improved.
【學位授予單位】：安徽理工大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TD752.2

【參考文獻】

相關期刊論文 前10條

1 鄧軍,徐精彩,陳曉坤;煤自燃機理及預測理論研究進展[J];遼寧工程技術大學學報;2003年04期

2 秦躍平;劉偉;郝永江;孫全;王亞茹;;采空區(qū)內(nèi)埋“花管”注氮及效果研究[J];礦業(yè)安全與環(huán)保;2012年04期

3 紀忠,梁棟,王繼仁,都文會;采空區(qū)注氮防火中氮氣運移規(guī)律的實驗研究[J];阜新礦業(yè)學院學報(自然科學版);1993年02期

4 馮小平;采空區(qū)高溫點位置確定的計算機模擬分析[J];淮南礦業(yè)學院學報;1995年01期

5 于樹江,李宗翔,張錦鵬;采空區(qū)防火注氮過程的數(shù)值模擬與參數(shù)確定[J];黑龍江科技學院學報;2004年04期

6 余明高,賈海林,潘榮錕;烏達礦區(qū)煤自燃預測標志氣體研究[J];河南理工大學學報(自然科學版);2005年02期

7 唐家德;;基于MATLAB的非線性曲線擬合[J];計算機與現(xiàn)代化;2008年06期

8 宋萬新;楊勝強;徐全;;基于氧氣體積分數(shù)的高瓦斯采空區(qū)自燃“三帶”的劃分[J];采礦與安全工程學報;2012年02期

9 李宗翔,孫廣義,王繼波;綜放工作面煤柱內(nèi)漏風與耗氧過程的數(shù)值模擬[J];力學與實踐;2001年04期

10 張瑞林,楊運良,史本林,杜禮明;綜放采空區(qū)自燃帶的三維數(shù)值模擬研究[J];煤礦安全;2000年10期

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