依据西南成品油管线隧道穿越岩溶区河流施工的工程实践，介绍了岩溶区河流下隧道施工时特殊情况下的岩石爆破方法，提供了隧道发生涌水、围岩变形和穿越溶洞时的施工办法和有关措施。提出了岩溶区河流下隧道施工的建议。

On basis of construction of the rivercrossing karst tunnels on the oildelivery pipe lines in southwest of China, the author presents the blasting method adopted for the construction of the rivercrossing tunnels in karst regions, describes the construction methods and relevant countermeasures to cope with the tunnel water inflows, ground deformation and the karst geology and makes some recommendations on the construction of rivercrossing tunnels in karst regions.