摘要
采用速封注式注浆囊袋封孔技术对顺层钻孔进行封孔,并对封孔效果进行分析。研究表明:利用高压注浆充填钻孔周围裂隙,消除了钻孔的漏气通道,使钻孔得到可靠支护,杜绝了钻孔因扰动而产生新的漏气通道,有效提升抽放浓度;与原封孔工艺相比,单孔浓度提高了2倍,单孔纯流量提高了3倍,显著提升了钻孔的利用率与瓦斯抽采率。
The speed of sealing type grouting pouch hole sealing technology for bedding drilling hole sealing, and analyze the effect of hole sealing, research data show that the use of high pressure grouting around the borehole fissure filling, eliminate the hole leakage passage, reliable supporting drilling, and put an end to the drilling due to disturbance in the new air leakage passage, effective improve drainage concentration; Compared with the intact hole process, puckering concentrations increased two times,puckering pure flow increased three times, significantly improve the efficiency of drilling and gas extraction rate.
出处
《煤炭技术》
CAS
北大核心
2015年第8期148-150,共3页
Coal Technology
关键词
顺层钻孔
瓦斯抽采
封孔
gas extraction
bedding
drilling hole sealing
