矿井采区开放式上下山相结合开采技术，从根本上解决了传统下山开采通风、排水生产系统复杂，生产管理难度大等一系列生产技术难题。使下山开采不受瓦斯涌出量、涌水量大小的限制，可在缓倾斜煤层开采中普遍应用推广。高坑煤矿在延深四水平首采区采用该技术进行优化设计并结合 Mine mining area open up and down the mountain with a combination of mining technology, a fundamental solution to the traditional downhill mining ventilation, drainage production system complex, production management is difficult and a series of production technology problems. So that downhill mining is not affected by gas emission, the amount of water inflow restrictions, can be widely used in the gentle inclined seam mining promotion. Gaokeng coal mine in the depth of the first four mining areas using the technology to optimize the design and integration