The research results show that the stability of rock beam-pillar depends on the mechanicalgeometry characteristic of the system, and it has nothing to do with the external factors.
研究结果表明，岩梁-矿柱系统的稳定性取决于系统自身的力学-几何特性，与外界因素无关。
2
They also discuss a wide range of applications, including the use of lasers for studying dynamic behavior of mechanical components, and fractal geometry for recognizing patterns.
他们还讨论了识别模式的应用广泛，包括了激光器的研究动态行为的机械零件的使用范围，并分形几何。
3
Mechanical sticking can be caused by junk in the hole, wellbore geometry anomalies, cement, keyseats or a buildup of cuttings in the annulus.