提高下向钻孔抽采效果的技术研究  

Technical research on improving the extraction effect of downward drilling holes

作　　者：靳春震 于小明 冯磊[2] 

机构地区：[1]淮浙煤电公司顾北矿,安徽淮南232151 [2]安徽理工大学能源与安全学院,安徽淮南232001

出　　处：《陕西煤炭》2012年第4期46-47,42,共3页Shaanxi Coal

摘　　要：北一(6-2)轨道上山下部车场高抽巷下向钻孔成孔、护孔、排渣及抽采中排水困难导致下向钻孔抽采效果差。通过全程下套管提高成孔率,采用多步段封孔技术提高封孔严密性,在孔内加设高压气管,利用高压气体清除孔内积水及煤岩粉,切实提高了下向钻孔的抽采效果。The pore- forming, protection of drillings, slag discharge and drainage difficulties leads to poor extraction effect of downward drilling holes. The paper introduced the technologies that improving the pore - forming rate by the entire casing, improving the sealing tightness by multi - step sealing technology and clearing the water and coal powder from borehole using high pressure air. Practice shows that the technologies can improve the extraction effect of downward drilling holes.

关 键 词：下向钻孔 成孔 孔内积水 抽采效果 

分 类 号：TD712.6[矿业工程—矿井通风与安全]