一、概述石泉水利枢纽,位于汉江上游陕西省石泉县境,壩址在石泉县城上游约一公里的峡谷出口段,河谷呈梯形,两岸山势陡峻,枯水河面(高程360米)宽约180米,基岩高程354米左右。壩区当秦岭背科之东翼,为石碳二选纪变质岩系。壩址主要基岩为云母石英片岩及针柱状云母石英片岩互层,且无明显界限,岩性较为坚硬,可钻性7～9级,岩石湿抗压强度除局部黑云母片理密集带和含绢云母 I. Overview Shiquan Water Control Project is located in the upstream of Hanjiang River in Shiquan County, Shaanxi Province. The dam site is about one kilometer upstream of Shiquan County. The valley is trapezoid, and the steep mountains and rivers (elevation 360m) are 180 Meter, bedrock elevation of 354 meters. Dam area when Qinling back of the eastern wing, for the second carbon-bearing metamorphic rocks. The main bedrock of the dam site is mica-quartz schist and acicular-mica-quartz schist interbed, and there is no clear boundary between them. The lithology is relatively hard and the drillability is from 7 to 9. The wet compressive strength of the rock besides the intensive biotite banding and Sericite containing