近年来，全国各地开发利用坑道式人防工程越来越多。其中，一些规模较大的坑道工程被设计改造为商业用途。因商业性质具有客流量大，通风疏散困难等特点，其空调及防排烟问题尤需引起高度重视。笔者于几年前参与设计了青岛市“902”工程即中山地下商城。该商城于1994年初施工， In recent years, more and more tunneling civil air defense projects have been developed and utilized throughout the country. Among them, some of the larger tunnel projects were designed to transform into commercial use. Due to the commercial nature of large passenger flow, ventilation and evacuation difficulties and other characteristics of its air-conditioning and smoke control problems, especially the need to attach great importance. A few years ago, I participated in the design of Qingdao City, “902” project that Zhongshan underground mall. The mall was constructed in early 1994,