1) Blast hole infilling
加密炮孔
2) spread densification
加密炮排
1.
Through large amount testing works,made sure that in the middle part of poor condition area,to use technique of long spread receiving,spread densification,economic and reasonable seismic data acquisition methods and parameters,have gotten better seismic data,found main mineable coal seam hosting and structural development conditions.
通过大量试验工作,确定了在条件差区域中间地段,采用大排列接收、加密炮排等技术经济合理的地震数据采集方法和参数,取得了较好的地震资料,查明了主要可采煤层的赋存情况和构造发育情况。
3) bore hole compression coefficient
炮孔密集系数
1.
The key is how to select reasonable bore hole compression coefficient m in the design of wide-space blasting.
宽孔距爆破设计的关键在于选取合理的炮孔密集系数m,根据宽孔距破岩机理,利用几何关系,推导出最佳的炮孔密集系数m=2 3,并提出了比较系统的爆破设计方法,包括炮孔平面布置参数确定,起爆顺序等。
4) dense holes blasting
密集炮孔爆破法
5) closely spaced perforation
加密射孔
补充资料：第二孔(继发孔)型缺损
第二孔(继发孔)型缺损
ostium secondary defect
是心房间隔在形成上发生障碍，一般缺损较大，多在卵圆孔附近称第二孔(继发孔)型缺损。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条