hole shrinkage

基本解释

As a result, the short hole shrinkage method with flat bottom structure was employed to mine the stope firstly, then stoping ore pillar by medium length hole caving method.
后沟金矿采用平底结构浅孔留矿法先采矿房，后用中深孔崩落法回采矿柱，经两年多的生产实践，取得较好的技术经济指标。
Synopsis: This paper introduces the position and characteristics of the blow hole shrinkage in the side riser of cast steel castings and probes into the formation mechanism and its prevention.
本文介绍了铸钢件边冒口气缩扎的产生部位及特征，并对其形成机理及防止措施进行了探讨。
Short-hole shrinkage mining is an effective method for mining steep-thin veins, and it has advantages of high-efficiency and low-waste and simple technology.
浅孔留矿法对急倾斜薄矿脉的矿体开采是一种有效的采矿方法，具有高效低耗与工艺简单等优点。