hole shrinkage

基本解釋

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.
后溝金礦采用平底結(jié)構(gòu)淺孔留礦法先采礦房，后用中深孔崩落法回采礦柱，經(jīng)兩年多的生產(chǎn)實(shí)踐，取得較好的技術(shù)經(jīng)濟(jì)指標(biāo)。
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.
本文介紹了鑄鋼件邊冒口氣縮扎的產(chǎn)生部位及特征，并對其形成機(jī)理及防止措施進(jìn)行了探討。
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.
淺孔留礦法對急傾斜薄礦脈的礦體開采是一種有效的采礦方法，具有高效低耗與工藝簡單等優(yōu)點(diǎn)。