基于核磁共振<i>T</i><sub>2</sub>谱图的裂隙砂岩疲劳损伤分析

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2 大孔占比随疲劳上限应力比的拟合方程特性

Table 2 Characteristics of fitting equation of proportion of large pores with fatigue upper limit stress

裂隙倾角/（°）	拟合曲线方程	拟合系数R²	X=0.96的拟合数值
0	y=0.15421+0.58142*x^3.33836	0.97290	0.66156
15	y=0.14508+0.44167*x^10.39212	0.97241	0.43406
30	y=0.15864+0.50032*x^5.426	0.99970	0.55955
45	y=0.17174+0.34557*x^3.10133	0.93511	0.47622
60	y=0.13469+0.55907*x^6.46836	0.99831	0.56402