单一低透气性煤层顶分层采面卸压抽采技术研究

 摘 要：受工作面回采影响，通常在工作面前方10 m范围内形成卸压带，在此区域内煤体渗透性和孔隙率进一步增加，这些客观因素在一定程度上间接为瓦斯抽采提供了便利条件。本文以鹤壁中泰矿业31021综采工作面为例，研究了采动影响下卸压瓦斯抽采作用，以及通过对工作面瓦斯抽采数据分析，研究了单一低透气性煤层综采工作面卸压瓦斯的抽采效果。

Application research on relief gas drainage technique in top slicing coal face of single seam with low permeability

AbstractThe relaxation zone is formed 10 meters in front of the working face because of mining. To some extent, the objective condition which coal seam permeability and porosity in relaxation zone indirectly provides favorable conditions for gas extraction. In this paper, taking the 31021 fully mechanized mining face in Hebi Zhongtai Mining in Henan for example, the gas drainage in pressure releasing area is studied under the mining effect. A remarkable effect has been obtained by relief gas drainage technique in top slicing coal face of single seam with low permeability, based on the gas extraction data analysis.