走向高位钻孔抽放采空区瓦斯试验研究

Experimental Study on Gas Drainage in Goaf by High-level Boreholes

本文对沁和能源集团永安煤矿215综放工作面采用走向高位钻孔抽放采空区瓦斯进行试验研究,对215工作面高位钻孔布置进行了分析,阐述了钻孔施工工艺。对1号、2号钻场瓦斯抽放量进行实测,指出了瓦斯浓度不高、瓦斯抽放量不大的问题,分析了抽放效果欠佳的原因,为下一步改进高位钻孔抽放工艺和提高抽放效果提供了依据。

This paper makes an experimental study on gas drainage in goaf by high-level boreholes in 215 fully mechanized caving face of Qinhe Energy Group Yongan Coal Mine,analyses the arrangement of high-level boreholes in 215 working face,and expounds the construction technology of boreholes.The gas drainage quantity of No.1 and No.2 drilling sites is measured.The problems of low gas concentration and small gas drainage quantity are pointed out.The causes of poor drainage effect are analyzed,which provides a basis for further improvement of high-level borehole drainage technology and drainage effect.