The mine of Fengshuigou of Pingzhuang Mining Bureau invaded by little mines is diffical bank suceed and hard to carry out routine production.

• 风水沟煤矿因受小煤窑侵占，采场接续非常紧张，正常生产难以维持，为改变生产被动局面，该矿在确定延深方式时采用方案比较法进行了优化选择。