摘要
在露天开采向井下开采过渡期间,露天爆破震动造成井下巷道破坏;为此,采取了一系列技术措施降低爆破震动,保证了露天采矿生产和井下掘进工程的正常进行。这些措施包括孔内分段装药,孔内、孔间、排间联合微差起爆,合理选用微差时间及起爆顺序;同时辅以增减上、下梯段高度,孔底间隔垫层等。文中详细讨论了孔内分段数的确定,段高的调整,微差时间和起爆顺序的选择以及井下巷道受损程度的判断方法。
During the transition of surface mining to underground mining,the underground workings were damaged by surface blasting vibrationFor this reason,a series of technological measures were taken,thus ensuring normal surface mining and underground driftingThese measures include the decked charge in a hole,the millisecond blasting of combining inhole and interhole delays with interrow delay,reasonable delay interval and blasting sequenceThe other measures involve increasing the heights of upper or down benches and putting a buffer pad in the bottom of a holeIn this paper,the determination of decked charge number,the adjustment of bench height,the selection of delay interval and initiating sequence and the judgment of heading damage degree were discussed in more detail
出处
《工程爆破》
2002年第4期62-66,88,共6页
Engineering Blasting
关键词
露天减震爆破
露天矿
间隔装药
微差爆破
减震措施
矿山爆破
Openpit mine
Transition of surface to underground mining
Decked charge
Millisecond blasting
Vibration-reduction measures
