含大直径中空孔的直眼掏槽在岩巷掘进的应用  

The application of parallel cut with large diameter hollow bore in rock drivage

作　　者：刁先鹏 

机构地区：[1]中国平煤神马建工集团有限公司建井一处,河南省平顶山市467000

出　　处：《中国煤炭》2015年第8期77-80,共4页China Coal

摘　　要：为加大八矿运输上山掘进工作面爆破进尺,根据施工现场的实际地质情况,决定采用CMJ17HT全液压钻车代替YT-28型风钻打眼。重新设计了爆破参数,改用含大直径中空孔的直眼掏槽方式进行爆破掘进。经过近半个月的现场试验,爆破进尺有明显提高,说明增加掏槽眼自由面的面积,有利于提高爆破进尺。In order to increase the blasting footage in driving face of transportation uphill in No.8mine,the CMJ17 HT full hydraulic drill carriage was chosen to replace the YT-28 type pneumatic drill according to the actual geological conditions in the construction site.The blasting parameters are redesigned,and parallel cut with large diameter hollow bore was applied during blasting excavation.After conducting field trails for nearly half a month,the blasting footage had been significantly increased,which showed that enlarging the free surface area of cutting hole could help to increase the blasting footage.

关 键 词：爆破掘进 大直径中空眼 直眼掏槽 自由面 CMJ17HT全液压钻车 

分 类 号：TD263[矿业工程—矿井建设]