高瓦斯矿井工作面瓦斯综合抽采技术分析

瓦斯抽采效果是保障高瓦斯工作面安全生产的前提。为了降低高瓦斯工作面前方煤体的瓦斯含量,防止采空区瓦斯涌入工作面造成瓦斯超标,本文分析了采用水力压裂增加煤层透气性,形成相互交织的瓦斯抽放通道,通过本煤层抽放钻孔提前预抽煤层瓦斯,并通过高、中位钻孔和穿透钻孔抽放采空区瓦斯的工作面瓦斯综合抽采技术。采用该技术可有效降低工作面前方煤体、采空区和上隅角的瓦斯含量,保障工作面安全回采。

Analysis of Comprehensive Gas Drainage Technology in Working Face of High Gas Mine

The effect of gas extraction is the premise of ensuring the safety production of high gas working face.In order to reduce the gas content of coal body in front of high gas working face and prevent gas gushing into working face in goaf from causing gas exceeding the standard.In this paper,hydraulic fracturing is used to increase the permeability of coal seam and form interwoven gas drainage channels.The gas in coal seam is pre-pumped through the drainage boreholes in this coal seam in advance,and the comprehensive gas drainage technology in the working face of gas drainage in goaf through high,medium and penetrating boreholes is analyzed.This technology can effectively reduce the gas content in the coal body,goaf and upper corner in front of the working face,and ensure the safe mining of the working face.