基于核磁共振T2谱图的裂隙砂岩疲劳损伤分析

毛思羽,曹平,李建雄,欧传景

Fatigue Damage Analysis of Fractured Sandstone Based on Nuclear Magnetic Resonance T2 Spectrum

Siyu MAO,Ping CAO,Jianxiong LI,Chuanjing OU

表3 各倾角裂隙砂岩的损伤变量D的相关方程

Table 3 Correlation equation of damage variable D of fractured sandstone with different inclination angles

裂隙倾角/（°） D与上限应力比的关系 D与上限应力（σmax）的关系 0 D0=1.14599*x3.33836 D0=1.14599*（σmax/39.58）3.33836 15 D15=1.52838*x10..39212 D15=1.52838*（σmax/33.66）10..39212 30 D30=1.24796*x5.426 D30=1.24796*（σmax/35.75）5.426 45 D45=1.13495*x3.10133 D45=1.13495*（σmax/37.72）3.10133 60 D60=1.30219*x6.46836 D60=1.30219*（σmax/36.51）6.46836