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。

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Oilfield is mined under the condition of function of edge-bottom water, when there is often crowded cement content, and through sealing borehole realize to seal high aquifer.

油田在边底水作用的条件下开采，作业时往往具有挤水泥措施内容，通过封堵炮眼实现封堵高含水层段。

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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。

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