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一、基本情况陕西省石砭峪水库采用定向爆破筑坝,其爆破装药量达1582吨,爆破分主爆区(左岸)付爆区(右岸),两爆区均布置两排药包,两排药包起爆时间间隔为2.16秒。该水库坝址区,岩石为片麻状花岗岩,两岸地形陡峻,平均坡度达45—60度;坡高达200—300米,两岸边坡均有岸边重力裂隙,一般深度达3—6米,个别的深度达20—30米,在地形突出的部分,被大裂隙切割,构成岸边活动岩体。爆破前最为人们关心的最大的活动岩体有三:1.左岸上游鳖盖;2.左岸下游三角体;3.右岸上游老虎咀。爆破中,后一岩体
I. Basic Conditions Directional blasting and damming are carried out in Shihanyu Reservoir in Shaanxi Province, with a total explosive capacity of 1582 tons. The blasting area (left bank) of the blasting area (right bank) is divided into two rows of kits, Two rows of kits detonated at intervals of 2.16 seconds. The reservoir dam site, the rock for the gneiss granite, the steep terrain across the Taiwan Strait, the average slope of 45-60 degrees; up to 200-300 meters up the slope, both banks have shoreline gravity cracks, the general depth of 3-6 meters, The individual depth of 20-30 meters, in the prominent part of the terrain, was cut by the large cracks, constitute the rock body activities on the bank. Before the blasting most people are concerned about the largest activities of rock three: 1. Leftover upstream turtle cover; 2. The left bank of the lower triangular body; 3. The right bank upstream of the tiger Tsui. Blasting, after a rock