borehole sealing

基本解释

It introduces one kind of new technology—— "ladder"-like sealing off a borehole by slipping casting.
提出了一种针对深钻孔的注浆封孔新方法——“阶梯”式注浆封孔方法。
In coring drilling, under-water cement grouting was often used for wall protection, leakage blocking, borehole sealing and downhole accident treatment.
在岩心钻探中，常常要用水下灌注水泥的方法来护壁、堵漏、封孔、处理井故。
Because of the weak borehole sealing and inadequate use of the initial free face, the higher investment and unsatisfactory blasting effect still exist in the mine tunnel excavation blasting.
由于炮孔堵塞不牢和初始自由面利用不充分，井下平巷的掘进开挖爆破仍存在投入大、爆破结果欠理想等问题。