一、引言采用先进采矿设备以后,矿山长壁工作面产量逐渐增加,工作面的产量有时可能受到瓦斯的限制.为保证瓦斯浓度在法定值以下,抽放瓦斯是十分必要的。随着采深加大,煤层瓦斯含量也会增加,瓦斯危害会更加严重,将来抽放瓦斯矿井还要增加。二、抽放区设计为了更有效、更经济地抽放瓦斯,应该有一套管路设计及选择抽放泵的优化方q I. INTRODUCTION After using advanced mining equipment, the output of longwall mining face will gradually increase and the working face’s output may be limited by gas sometimes. In order to ensure the gas concentration below the legal value, it is very necessary to drain the gas. As mining depth increases, coal seam gas content will also increase, gas hazards will be more serious, the future extraction of gas mines but also increase. Second, the drainage area design In order to more efficient and more economical gas drainage, there should be a set of pipeline design and selection of drainage pump optimization q