يعرض 2,181 - 2,200 نتائج من 24,549 نتيجة بحث عن '(( significant decrease decrease ) OR ( significant ((trend decrease) OR (greater increase)) ))', وقت الاستعلام: 0.33s تنقيح النتائج
  1. 2181

    UCS texts data. حسب Na Zhao (112953)

    منشور في 2025
    "…The results indicate that: (1) the presence of pores prolongs both the time to failure and the onset of the AE burst stage, with longer durations observed at higher pore dip angles; (2) AE signal amplitude and frequency vary significantly across different loading stages, and the b-value exhibits an “increase–fluctuation–decreasetrend, with the decreasing stage serving as a precursor to rock instability; (3) pore dip angle strongly influences crack propagation types: dip angles of 0°–30° favor axial cracks and through-going wing cracks, 45°–75° angles tend to induce co-planar and wing crack connectivity, while 90° angles cause crack deviation, hindering through-going failure; (4) intact rock fails in a tensile–shear mixed mode, whereas the number of shear cracks in rocks with pores initially increases and then decreases with dip angle, reaching a maximum at 45°, resulting in shear-dominated failure. …"
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