摘要
主要介绍了复式三角形分层分段直眼掏槽、复式正方形分层分段直眼掏槽以及孔内微差分段直眼掏槽在石灰岩井筒爆破中的对比试验情况。结果表明:复式正方形分层分段掏槽在试验井筒中有最佳的爆破效果,并应用现有岩石动力学的成果分析了这一试验结果的原因。此外,试验还表明最佳的炮孔深度接近于井筒的半径。
Field experiments of vertical staged cutting with a duplex-triangle, with a duplex-square, and with millisecond delay in a hole are reported in this paper. It is found that the staged cut with duplex-square has the best blasting effect in trial shafts sinking. This experimental result is analyzed with the existing achievements of rock dynamics. In addition, our experiments also indicate that the best depth of blast hole is close to shaft radius.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2003年第4期636-640,共5页
Chinese Journal of Rock Mechanics and Engineering
关键词
井巷工程
立井
中深孔爆破
分层分段
直眼掏槽
roadway engineering, shaft, blasting in medium and deep holes, stage-by-stage cutting, vertical hole cutting
