银山铅锌矿北山区深部通风系统改造

针对银山铅锌矿北山区深部通风困难的状况，分析了北山区通风系统存在的主要问题，为了适应生产发展的需要，结合矿体赋存条件和生产布局对原通风系统进行了改造，新系统投入运行后，深部我条件有较大改善，达到了预期目的。

A Reform on Deep Ventilation System of Yinshan Lead-Zinc Mine in North Area

Considering the difficulty of deep Ventilation,the main problems exist in the primary ventilation system of Yinshan orefield in north area are analysed . Combining the occurrence with distribution of orebody,the primary ventilation system is reformed.The result shows that the condition of deep ventilation is improved and the desired results have been achieved.