【摘要】：本論文主要是針對黃巖匯煤礦綜采放頂煤單一煤層開采,開采煤層為15#煤層,其上覆煤巖層有13#、12#、11#、9#、8#等薄煤層及K2和K3灰?guī)r,采煤工作面瓦斯涌出量以鄰近層瓦斯涌出量為主,鄰近層瓦斯涌出量占采煤工作面瓦斯涌出量的85%以上,高抽巷抽采卸壓瓦斯是攔截高瓦斯礦井綜采放頂煤鄰近層卸壓瓦斯的有效途徑。本文主要以卸壓煤巖層瓦斯賦存和流動(dòng)基本理論及采場覆巖裂隙演化理論為基礎(chǔ),分析了采后上覆煤巖層的卸壓原理,結(jié)合數(shù)值模擬,研究了開采煤層上覆“兩帶”的范圍,得出冒落帶的高度約為15m,裂隙帶的高度約為60m。運(yùn)用理論知識研究了高抽巷在工作面傾向上的布置范圍和距離開采煤層頂板的合理層位,結(jié)合15109工作面和15102工作面布置高抽巷的設(shè)計(jì)基礎(chǔ)參數(shù)及實(shí)際考察數(shù)據(jù)效果等有關(guān)技術(shù)資料,研究結(jié)果表明高抽巷距離回風(fēng)巷道水平投影50m,距離開采煤層頂板以上約55m時(shí),抽采效果最好。恰好處于理論分析和數(shù)值模擬的裂隙帶,該層位為卸壓瓦斯流動(dòng)及儲(chǔ)集提供了通道和空間,是瓦斯的富集和運(yùn)移場所,同時(shí)也說明了理論分析與現(xiàn)場實(shí)際結(jié)果相吻合。
[Abstract]:This paper is mainly aimed at the single coal seam of fully mechanized caving in Huang Yan Hui coal mine. The coal seam is 15 # coal seam. There are 13 #12 #12 #11 #9 #n9 #qun8# coal seams and K2 and K3 limestone in the overlying coal seam. The gas emission amount in the mining face is mainly the gas emission from the adjacent strata. The amount of gas emission from adjacent strata accounts for more than 85% of the amount of gas emission in coal mining face. High drainage roadway is an effective way to intercept the pressure relief gas in the surrounding strata of fully mechanized top coal caving in high gas mine. In this paper, based on the basic theory of gas occurrence and flow in relief coal seam and the evolution theory of overburden fracture in stope, the pressure relief principle of overlying coal strata after mining is analyzed. Combined with numerical simulation, the scope of "two zones" overlying coal seam is studied. The height of the caving zone is about 15m and the height of the fissure zone is about 60m. Using theoretical knowledge, this paper studies the layout range and the reasonable horizon of the roof of the coal seam in the face inclination of the high drawing roadway. Combined with the basic design parameters of 15109 and 15102 working faces and the actual investigation data, the research results show that the horizontal projection of the high extraction roadway is 50 m, and the distance is about 55 m above the roof of the coal seam. The extraction effect is the best. It is just in the fracture zone of theoretical analysis and numerical simulation, which provides the passage and space for the gas flow and reservoir, and is the place of gas accumulation and migration. At the same time, it also shows that the theoretical analysis is in agreement with the actual results in the field.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TD712.6

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本文編號：2197542