黄岩汇煤矿高抽巷抽采瓦斯技术研究
发布时间：2018-08-22 15:36
【摘要】：本论文主要是针对黄岩汇煤矿综采放顶煤单一煤层开采,开采煤层为15#煤层,其上覆煤岩层有13#、12#、11#、9#、8#等薄煤层及K2和K3灰岩,采煤工作面瓦斯涌出量以邻近层瓦斯涌出量为主,邻近层瓦斯涌出量占采煤工作面瓦斯涌出量的85%以上,高抽巷抽采卸压瓦斯是拦截高瓦斯矿井综采放顶煤邻近层卸压瓦斯的有效途径。本文主要以卸压煤岩层瓦斯赋存和流动基本理论及采场覆岩裂隙演化理论为基础,分析了采后上覆煤岩层的卸压原理,结合数值模拟,研究了开采煤层上覆“两带”的范围,得出冒落带的高度约为15m,裂隙带的高度约为60m。运用理论知识研究了高抽巷在工作面倾向上的布置范围和距离开采煤层顶板的合理层位,结合15109工作面和15102工作面布置高抽巷的设计基础参数及实际考察数据效果等有关技术资料,研究结果表明高抽巷距离回风巷道水平投影50m,距离开采煤层顶板以上约55m时,抽采效果最好。恰好处于理论分析和数值模拟的裂隙带,该层位为卸压瓦斯流动及储集提供了通道和空间,是瓦斯的富集和运移场所,同时也说明了理论分析与现场实际结果相吻合。
[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.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TD712.6
本文编号：2197542
[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.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TD712.6
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