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。