In mining the extremely fractured thin ore body, the separation of waste rock in the conventional shrinkagestoping was replaced by the separation of the rich ore and retaining the lean ore.
对极破碎薄矿体的开采，采用了将常规的留矿法中分选废石改为分选富矿石留贫矿石的采矿方法。
2
The technical mining conditions of mineral deposit of Baofengshan Lead-Zinc Mine are stated in detail, some problems in application of shorthole shrinkagestoping introduced.
详述了宝丰山铅锌矿的矿床开采技术条件，介绍了浅孔留矿法在应用中存在的问题。
3
Based on the existing conditions, Pindu Municipal Gold Mine preferred short-hole shrinkagestoping without sill, intermediate and crown pillar to other mining methods and obtained excellent result.