2105 working face of Jiuxin Coal Industry Co.,Ltd.is a soft coal seam,the coal seam has poor permeability,the gas extraction borehole is difficult to seal,and the gas leakage is serious in the late drilling period.In view of this situation,an integrated sealing and plugging device was developed to implement the sealing process,which has the dual functions of grouting sealing and gas leakage sealing.The practical application results show that the average gas volume fraction increased from 19.1%to 41.1%during 0-100 d of drilling,and the average gas volume fraction increased to 50.2%after 30 d of gas leakage disposal.The sealing process can effectively solve the problem of gas leakage in the late sealing period of drilling,and effectively improve the volume fraction of gas extraction in the late drilling period.
关键词
低透气性煤层/瓦斯抽采/封堵一体化/封堵器
Key words
low permeability coal seam/gas extraction/integration of sealing and plugging/sealing and plugging device
维普
万方数据