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| 1 | Direct measurement and theoretical prediction model of interparticle adhesion force between irregular planetary regolith particles显示文摘Interparticle adhesion force has a controlling effect on the physical and mechanical properties of planetary regolith and rocks.The current research on the adhesion force of planetary regolith and rock particles has been primarily based on the assumption of smooth spherical particles to calculate the intergranular adhesion force;this approach lacks consideration for the adhesion force between irregular shaped particles.In our study,an innovative approach was established to directly measure the adhesion force between the arbitrary irregular shaped particles;the probe was modified using simulated lunar soil particles that were a typical representation of planetary regolith.The experimental results showed that for irregular shaped mineral particles,the particle size and mineral composition had no significant influence on the interparticle adhesion force;however,the complex morphology of the contact surface predominantly controlled the adhesion force.As the contact surface roughness increased,the adhesion force gradually decreased,and the rate of decrease gradually slowed;these results were consistent with the change trend predicted via the theoretical models of quantum electrodynamics.Moreover,a theoretical model to predict the adhesion force between the irregular shaped particles was constructed based on Rabinovich’s theory,and the prediction results were correlated with the experimental measurements. | Heping Xie Qi Wu Yifei Liu Yachen Xie Mingzhong Gao Cunbao Li | 2023 | International Journal of Mining Science and Technology2023，33，11： | 0 |
| 2 | 不同应力路径下岩石细观力学性能离散元研究显示文摘岩体工程中的应力状态对围岩的稳定性具有重要影响。为研究地下巷道中岩体应力状态对围岩稳定性的影响规律,基于离散元理论,对地下巷道开挖过程的应力状态进行分析,开展了围压卸载—轴压增加、围压卸载—轴压不变和围压卸载—轴压减少3种不同卸载路径下的三轴压缩数值模拟试验,并与常规三轴压缩试验进行对比,分析了不同应力路径下的岩石宏观强度特征及细观损伤过程差异性。结果表明:强度准则和应力张量状态不受卸载路径的影响,但不同应力路径下岩体的损伤过程不同,围压卸载—轴压不变应力路径下的微观裂纹发育最密集,而围压卸载—轴压增加应力路径下的裂纹丛集速度最快。研究结果可为地下巷道开挖过程中的围岩应力卸载破坏分析提供参考。 | 李杰林 王京瑶 肖益盖 李小双 | 2023 | 黄金科学技术2023，31，1： | 0 |
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