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季申矿床为露天一地下联合开采，露天坑底下部保安隔离矿往被露天矿采除，矿区构造破坏现象普遍，矿山地质条件极其复杂。为保持矿山设计生产能力，将地下矿上部5个阶段矿体分为两个矿层同时开采；中间的一个阶段留作层间矿柱，最后开采。文章详述了两个矿层和层间矿柱的回来工艺；并详细阐述了为开采下部矿体设计的串联式连续分段矿房回来工艺。
The Jishen deposit is a joint open-pit and underground mining operation. The security isolation mine in the lower part of the open-pit pit is removed by the open-pit mine. The destruction of the mining area is widespread and the geological conditions of the mine are extremely complicated. In order to maintain the design and production capacity of mines, the ore bodies in the upper five stages of the underground mine are divided into two ore beds at the same time; one of the middle stages is reserved for the interlayer pillars and finally mined. The article details the process of returning two ore layers and interlayer pillars, and elaborates on the tandem continuous mining house back process designed for mining the lower orebody.