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揭示深部破裂岩体波速特征及深部破裂对岩体卸荷、损伤、完整性及弹性模量的影响,以叶巴滩水电站岸坡深部破裂为典型实例,开展深部破裂现象精细测绘与声波测试。研究表明:根据宏观地质特征与波速,可将深部破裂划分为轻微松弛型、中等松弛型、强烈松弛型;轻微松弛型深部破裂岩体纵波波速大于4 200m/s,中等松弛型深部破裂岩体纵波波速3 000~4 500m/s,强烈松弛型深部破裂岩体纵波波速小于3 000m/s;轻微松弛型深部破裂对岩体卸荷程度、损伤程度、强度弱化影响较小,中等松弛型深部破裂次之,强烈松弛型深部破裂影响最为显著;轻微松弛型深部破裂岩体较完整,中等松弛型深部破裂岩体完整性差-较破碎;强烈松弛型深部破裂岩体已处于较破碎-破碎状态。
The effect of deep velocity of ruptured rock mass and deep rupture on the unloading, damage, integrity and elastic modulus of rock mass are revealed. The deep rupture of bank slope at Yebaitan Hydropower Station is a typical example, and the deep rupture phenomenon is finely mapped and sonicated. The results show that according to the macro-geological characteristics and wave velocity, the deep faults can be divided into slight relaxation mode, moderate relaxation mode and intense relaxation mode. The P-wave velocity of the slightly-relaxed deep-ruptured rock mass is more than 4 200 m / s, P wave velocity is 3000 ~ 4500 m / s, P wave velocity is less than 3 000 m / s in the strongly-relaxed deep-ruptured rock mass. Slightly loose deep-rupture has little effect on rock unloading degree, damage degree and strength weakening. Followed by strong and deep relaxation. The slightly relaxed and deep-ruptured rocks are relatively intact, the moderate and deep-lying deep-ruptured rocks are poorly intact and fragmentary, and the strongly-relaxed and deep-ruptured rocks are in a more fragmented and fragmented state .