义煤集团李沟矿瓦斯抽放系统设计_图文精选.doc

义煤集团李沟瓦斯设计 摘要：矿井瓦斯抽放，是指为了减少和解除矿井瓦斯对煤矿安全生产的威胁，利用机械设备和 专用管道造成的负压，将煤层中存在或释放出来的瓦斯抽出来，输送到地面或其它安全地点 的方法m3/t，是高瓦斯矿井，回采工作面瓦斯绝对涌出量为7.84m3/min，掘进面绝对涌出量为0.9m3/min。本设计针对李沟矿二1煤层开采存在的瓦斯涌出量大、瓦斯超限严重等问题，结合该矿二1煤层透气性系数0.1m2/MPa2·d，钻孔瓦斯流量衰减系数0.0559d-1等基本参数，得出李沟矿属较难抽放型且开采时必须建立瓦斯抽放系统。根据前面所得参数确定李沟矿采用本煤层预抽、边采边抽和采空区抽采相结合的综合瓦斯抽放方法，并且对抽放方法的一些工艺方法和参数进行了设计。抽放系统管路选择了管径350mm的主管及管径统一为220mm的支管。瓦斯抽放泵选择的型号为CBF410-2型水环式真空泵，同时确定了泵站的附属设施。在设计的最后提出了一些具体的安全操作要求说明。 关键词：水 煤与瓦斯突出 。 Ligou mine field gas drainage and exploitation design Abstract: Mine gas drainage is a method that to reduce and eliminate threats of mine gas for coal mine safety production and mechanical equipment and pipelines are used to make negative pressure so the gas which are in the presence or released are extracted out to delivery to the ground or other secure location. The predictions shows that ligou mine relative gas emission is amount of 22.19t, what proved ligou an high-gas coal mine, and the mining face gas absolute emission is amount of 9.41in while heading face absolute Emission as 1.17in. This design for ligou mine two1 coal seam is on amount of the large gas emission, the serious gas gauge problem, combined with the mine coal seam permeability coefficient 0.3849Pa2?d, drilling gas flow attenuation coefficient 0.0283 and so on basic parameters, to draw the conclusion that ligou mine the difficult gas drainage type and it must be the establish an gas drainage system. Front parameters obtained to determine ligou mine the pre-extracting , While mining sauce and goaf drainage combining gas drainage design and drainage method process methods and parameters. Gas drainage pump are selected as 2BEC50type water ring vacuum pumps and ancillary facilities to determine the pumping station. In the final design puts forward requirements and descriptions in some specific security operation. Keywords: hydraulic flushing ;coal and gas outburst coal； mine gas drainage；working face.目 录 引言 1 1 矿井概况 3 1.1 井田概况 3 1.2 矿井开拓开采方式及通风方式 3 1.3 矿井地