摘要
针对寺河二号井9#开采煤层瓦斯抽采浓度低的问题,引进两种封孔工艺与原有封孔工艺进行对比试验研究,结果表明:囊袋式注浆封孔工艺技术较聚氨酯封孔技术瓦斯浓度提高了30%以上,固孔效果明显;并通过理论推导得到不同预抽期和预抽率下的钻孔布置间距,为9#煤层瓦斯预抽钻孔布置提供了参考。
Aiming at the gas drainage concentration is low in Sihe No. 2 Mine 9^# coal seam. borehole sealing technique introduced with the original sealing technique shows that gas concentration grouting sealing technology than the polyurethane sealing technology increased more than 30% , solid h vious;different pre -drainage times and layout spacing are obtained through theory derivation, to prov Comparing two of the bag type ole effect is obid reference for the pre -drainage gas sealing layout in 9^# coal seam.
出处
《山西焦煤科技》
2015年第8期8-10,14,共4页
Shanxi Coking Coal Science & Technology
基金
国家重大科技专项2011ZX05063
关键词
封孔工艺
瓦斯浓度
瓦斯流量
布孔间距
Borehole sealing technique
Gas concentration
Gas flow
Layout spacing
