【摘要】：漏風是導致采空區(qū)遺煤自燃的主要原因之一,同時也對采空區(qū)內瓦斯涌出具有重要影響,因此研究工作面采空區(qū)漏風意義重大。論文主要研究工作面不同通風和瓦斯抽采條件對采空區(qū)漏風的影響,分析各個因素對工作面采空區(qū)漏風的影響,并根據分析結果制定相應的對策�；�"O"型圈冒落壓實和非線性滲流理論,建立了采空區(qū)內流場數學模型;采用專業(yè)的流體力學模擬軟件fluent對劉莊礦151305工作面采空區(qū)漏風流場進行了數值模擬,結合劉莊礦該工作面實際開采條件,反演得到采空區(qū)滲透率分布模型,并對工作面采空區(qū)漏風流場和滲透率分布進行分析。結果表明:該工作面采空區(qū)流場分布符合"O"型圈特征,漏風范圍在工作面傾向0～160m,其中0-20m范圍內漏風最為嚴重;采空區(qū)滲透率下降最快區(qū)域在距開切眼煤壁走向0-15m和距進、回風側煤壁傾向0-15m范圍內,工作面后方走向0-70m范圍次之,其他區(qū)域滲透率基本不變;工作面自然危險區(qū)域為采空區(qū)進風側走向25-95m和回風側走向15-120m。在工作面采空區(qū)漏風現狀模擬的基礎上,分別模擬分析了高抽巷瓦斯抽采、工作面供風量及工作面風阻對采空區(qū)漏風的影響。根據模擬結果,擬合得到采空區(qū)漏風量與高抽巷瓦斯抽采量、工作面供風量及工作面風阻之間分別為指數、三次函數和一次函數關系。通過分析得出,高抽巷瓦斯抽采量和工作面供風量分別存在對采空區(qū)漏風量影響的臨界值,并分析得到該工作面臨界值的大小。若高抽巷瓦斯抽采量和工作面供風量小于其臨界值,則對采空區(qū)漏風影響最大的是工作面風阻,其次是工作面供風量,最小是高抽巷抽采量;若高抽巷瓦斯抽采量和工作面供風量大于其臨界值,則對采空區(qū)漏風影響最大的是工作面供風量,其次是高抽巷瓦斯抽采量,最小是工作面風阻。另外,對工作面采空區(qū)漏風范圍也進行了考察,結果表明,高抽巷瓦斯抽采量、工作面風量和風阻對工作面漏風范圍有一定影響,其值越大,漏風范圍也越大,其中高抽巷瓦斯抽采量最為明顯。
[Abstract]:Air leakage is one of the main causes of coal spontaneous combustion in goaf, and it also has an important influence on gas emission in goaf, so it is of great significance to study the air leakage in goaf of working face. This paper mainly studies the influence of different ventilation and gas extraction conditions on the air leakage in goaf, analyzes the influence of various factors on the air leakage in goaf, and formulates corresponding countermeasures according to the analysis results. Based on the theory of "O" ring caving compaction and nonlinear seepage, a mathematical model of the flow field in goaf is established, and the leakage flow field in goaf of 151305 working face in Liuzhuang Mine is numerically simulated by the professional fluid dynamics simulation software fluent. Combined with the actual mining conditions of the working face in Liuzhuang Mine, the permeability distribution model of the goaf is obtained by inversion, and the air leakage field and permeability distribution in the goaf are analyzed. The results show that the distribution of flow field in goaf of this face accords with the characteristics of "O" circle, the air leakage range is 0 ~ 160 m in the face, and the air leakage is the most serious in the range of 0-20 m, the fastest decrease of permeability in the goaf is in the distance of 0-15 m from the coal wall of the open cut hole and the distance into the coal wall. Within the range of 0-15m, the back direction of the coal face is 0-70m, the permeability of other areas remains unchanged, and the natural dangerous area of the face is the gob air side strike 25-95m and the backwind side strike 15-120m. On the basis of the simulation of the air leakage in the goaf of the working face, the effects of the gas drainage in the high drainage roadway, the air supply rate and the air resistance on the air leakage in the goaf are simulated and analyzed respectively. According to the simulation results, the relationship between air leakage in goaf and gas extraction in high drainage roadway is obtained. The relationship between air supply and air resistance is exponential, cubic function and primary function respectively. Through analysis, it is concluded that the critical value of gas extraction and air supply in high drainage roadway has influence on the air leakage in goaf, and the critical value of this face is obtained by analysis. If the amount of gas extraction and air supply in high drainage roadway is less than its critical value, the biggest influence on the air leakage in goaf is the air resistance in the face, the next is the air supply in the working face, and the minimum is the high drainage volume in the roadway. If the amount of gas drainage and the amount of air supply in the working face are greater than the critical value, the biggest influence on the air leakage in the goaf is the air supply in the face, the next is the amount of gas drainage in the high drainage roadway, and the minimum is the air resistance in the working face. In addition, the scope of air leakage in the goaf of working face is also investigated. The results show that the amount of gas drainage, the amount of air and the air resistance of the face have certain influence on the scope of air leakage of the face, and the larger the value, the bigger the scope of air leakage. Among them, high drainage roadway gas drainage is the most obvious.
【學位授予單位】：安徽理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TD728

【相似文獻】

相關期刊論文 前10條

1 戴廣龍;綜采放頂煤工作面采空區(qū)漏風與氧氣濃度分布規(guī)律研究[J];礦業(yè)安全與環(huán)保;2001年03期

2 郭玉森;采空區(qū)漏風規(guī)律的研究[J];煤礦開采;2001年01期

3 周成軍;;采空區(qū)涌出氣體綜合分析法測采空區(qū)漏風量[J];煤礦安全;2007年09期

4 王旭;郝迎格;宋先明;馬旭;;南屯煤礦大面積采空區(qū)漏風控制技術與實踐[J];煤礦安全;2011年07期

5 劉英學,夏蓓婭,鄔培菊,韓國杰;采空區(qū)漏風機理與防治對策研究[J];焦作工學院學報;1998年04期

6 于偉;;通風構筑物位置與采空區(qū)漏風關系探析[J];煤礦開采;2008年06期

7 吳中立;劉西才;趙時海;邵輝;;用六氟化硫氣體示蹤技術檢測采空區(qū)漏風[J];煤炭科學技術;1983年04期

8 B.Г.伊吉舍夫,B。A.波爾托拉,邵啟胤;泡沫幕對采空區(qū)漏風的影響[J];煤炭工程師;1990年06期

9 В.Г.伊吉舍葉夫,B.A.波爾多拉,周蒲英;泡沫帷幕對采空區(qū)漏風的影響[J];中州煤炭;1990年05期

10 梅福樹;戴廣龍;秦汝祥;周言安;陳梅勇;;潘一東礦Y型回采工作面采空區(qū)漏風檢測[J];礦業(yè)安全與環(huán)保;2014年02期

相關會議論文 前3條

1 王旭;郝迎格;宋先明;馬旭;;南屯煤礦大面積采空區(qū)漏風控制技術研究與實踐[A];第六屆全國煤炭工業(yè)生產一線青年技術創(chuàng)新文集[C];2011年

2 鄭忠亞;梁成;張福勇;;高瓦斯易自燃特厚煤層采空區(qū)漏風流場數值模擬研究[A];第三屆全國煤礦機械安全裝備技術發(fā)展高層論壇暨新產品技術交流會論文集[C];2012年

3 何俊忠;楊宏偉;;SF_6示蹤氣體在采空區(qū)漏風量測定及注氮優(yōu)化中的應用[A];2012年全國煤礦安全學術年會論文集[C];2012年

相關博士學位論文 前1條

1 王紅剛;采空區(qū)漏風流場與瓦斯運移的疊加方法研究[D];西安科技大學;2009年

相關碩士學位論文 前5條

1 南偉;檸條塔礦淺埋煤層大采高綜采面采空區(qū)漏風規(guī)律研究[D];西安科技大學;2015年

2 張睿卿;U型通風工作面采空區(qū)漏風影響因素研究[D];安徽理工大學;2017年

3 邵煒航;基于網絡解算的采空區(qū)漏風分析可視化實現[D];西安科技大學;2011年

4 李明珠;鳳凰山礦沿空留巷Y型通風方式下采空區(qū)漏風規(guī)律研究[D];太原理工大學;2012年

5 郭飛鵬;采空區(qū)漏風流場和瓦斯分布規(guī)律研究[D];河南理工大學;2011年

，

本文編號：2150060