本文關(guān)鍵詞： 高瓦斯 采空區(qū) 抽放 自然發(fā)火 數(shù)值模擬　出處：《西安科技大學》2013年碩士論文　論文類型：學位論文

【摘要】：煤層自燃火災嚴重威脅著我國礦井安全生產(chǎn)，其可能引發(fā)瓦斯、煤塵爆炸事故，釀成人員傷亡等的重大惡性事故。高瓦斯礦采空區(qū)浮煤自燃更是我們急需解決的問題，它直接影響礦井工作面的安全生產(chǎn)。 綜采放頂煤技術(shù)對礦井實現(xiàn)高產(chǎn)高效起到重要作用。但是，由于綜放面開采煤層厚度大，尤其是采空區(qū)“兩道”“兩線”頂煤放出率低，造成“兩道”“兩線”處遺煤量較多，高瓦斯礦井為減小采空區(qū)瓦斯?jié)舛�，實施高抽巷和瓦斯排放專用巷對采空區(qū)瓦斯進行抽放，加大了采空區(qū)漏風，增加了浮煤自燃危險性。因此，準確判定綜放采空區(qū)在抽放條件下浮煤自燃危險區(qū)域的位置是預防和撲滅采空區(qū)自然發(fā)火的關(guān)鍵。 本文以黃巖匯煤礦15109工作面為研究背景，從高瓦斯礦井抽放條件下綜放采空區(qū)浮煤自燃的特點出發(fā)，對其采空區(qū)在高抽巷及瓦斯排放專用巷同時運行條件下的漏風流場及氧濃度分布進行數(shù)值模擬研究。首先，在目前的煤自然發(fā)火機理、滲流力學、自然發(fā)火預測、自燃危險區(qū)域判定及數(shù)值模擬研究現(xiàn)狀的基礎(chǔ)上，通過實驗模擬測定煤層自然發(fā)火相關(guān)特性參數(shù)，利用相關(guān)學科知識，建立綜放采空區(qū)在高抽巷及瓦斯排放專用巷同時運行條件下氣體滲流預測模型，，對其進行數(shù)值模擬計算。然后，通過改變高抽巷抽采負壓來研究其對采空區(qū)“三帶”的影響。最后，根據(jù)實際現(xiàn)場觀測，對綜放采空區(qū)在高抽巷及瓦斯排放專用巷同時運行條件下采空區(qū)自燃危險區(qū)域進行靜態(tài)劃分，驗證建立的數(shù)學模型的可靠性和準確性。研究結(jié)果對指導同類型礦井采空區(qū)煤自燃防治具有極大的意義。
[Abstract]:Spontaneous combustion of coal seam is a serious threat to the safety of mine production in China, which may lead to gas, coal dust explosion accident. It is an urgent problem for us to solve the problem of spontaneous combustion of floating coal in goaf of high gas mine, which directly affects the safety of mine face. Fully mechanized top coal caving technology plays an important role in realizing high yield and high efficiency in coal mine. However, because of the large thickness of coal seam in fully mechanized caving face, especially the low caving rate of "two channels" and "two lines" in goaf. In order to reduce the gas concentration in the goaf, the high gas mine carries out the high drainage roadway and the special roadway of gas drainage to drain the gas from the goaf, which increases the air leakage in the goaf. Therefore, it is the key to prevent and extinguish spontaneous combustion in fully mechanized caving caving area. Based on the research background of 15109 face of Huang Yan Hui Coal Mine, this paper starts from the characteristics of spontaneous combustion of floating coal in fully mechanized caving area under the condition of high gas drainage. Numerical simulation of the air leakage field and oxygen concentration distribution in the goaf under the condition of high drainage roadway and special gas drainage roadway is carried out. Firstly, in the present coal spontaneous combustion mechanism, seepage mechanics. On the basis of prediction of spontaneous combustion, judgement of spontaneous combustion danger area and numerical simulation, the related characteristic parameters of spontaneous combustion of coal seam are measured by experimental simulation, and relevant subject knowledge is utilized. The prediction model of gas seepage in fully mechanized caving goaf under the condition of high drainage roadway and special roadway for gas drainage is established, and the numerical simulation calculation is carried out. By changing the negative pressure of high extraction roadway to study its influence on the "three zones" of goaf. Finally, according to the actual field observation. Under the condition of high drainage roadway and special roadway for gas drainage, the danger area of spontaneous combustion of goaf in fully mechanized caving caving is divided statically. The reliability and accuracy of the established mathematical model are verified. The results of the study are of great significance to guide the prevention and control of coal spontaneous combustion in the goaf of the same type of mines.
【學位授予單位】：西安科技大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TD75

【參考文獻】

相關(guān)期刊論文 前10條

1 徐精彩,葛嶺梅,賀敦良;煤炭低溫自燃過程的研究[J];煤炭工程師;1989年05期

2 陳立文;煤層自燃危險程度識別的研究[J];煤炭工程師;1992年05期

3 劉二永;汪云甲;顧強;丁曙光;盛耀彬;;矸石山自燃的溫度場模型[J];礦業(yè)安全與環(huán)保;2007年04期

4 齊慶杰,黃伯軒;用計算機模擬法判斷采空區(qū)自然發(fā)火位置[J];煤炭工程師;1997年05期

5 余楚新,鮮學福,譚學術(shù);煤層瓦斯流動理論及滲流控制方程的研究[J];重慶大學學報(自然科學版);1989年05期

6 郭嗣琮，孫樹江;煤炭自燃的模糊分類與識別[J];阜新礦業(yè)學院學報(自然科學版);1995年01期

7 牛會永;張辛亥;;煤炭自燃機理及防治技術(shù)分類研究[J];工業(yè)安全與環(huán)保;2007年10期

8 盧山,孫培雷;煤堆自燃的理論與計算[J];工業(yè)鍋爐;2004年04期

9 馬尚權(quán);朱建芳;蔡衛(wèi);劉厚福;柳俊倉;;綜放面采空區(qū)遺煤自然發(fā)火特性研究[J];華北科技學院學報;2007年03期

10 張國樞,戴廣龍,王衛(wèi)平;煤炭自燃模擬實驗裝置設(shè)計與研制[J];淮南工業(yè)學院學報;1999年04期

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