一、简要地质情况上马岭水电站引水隧洞全长7600余米,为我国当前已完成的最长的水工隧洞之一。隧洞所通过之岩层为震旦纪雾迷山系矽质灰岩、洪水庄页岩、铁岭灰岩、下寒武纪上马岭页岩,其中并有玢岩、霏细岩,呈岩床侵入。矽质石灰岩中有带条状石连续分布的燧石结核,岩层 First, a brief geological conditions Upper Maling Hydropower Station diversion tunnel total length of more than 7600 meters, is China’s current completed one of the longest hydraulic tunnel. The strata through which the tunnels pass are the Sinian foggy-mire siliceous limestone, Hongshuhuang shale, Tieling limestone, and the Lower Cambrian Shangmaling shale. In addition, there are pluton and feldspathic rock intruded into the rock bed. Silical limestone with strip of stone continuous distribution of flint nodules, rock formations