• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Volcanology and Geothermal Research >Particle interaction inside debris flows: Evidence through experimental data and quantitative clast shape analysis
【24h】

Particle interaction inside debris flows: Evidence through experimental data and quantitative clast shape analysis

机译：泥石流内部的颗粒相互作用：通过实验数据和定量碎屑形状分析的证据

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Results of analytical experiments related to the dynamic behavior of debris flows are presented. Particle in-teraction and the amount and type of fines content present in the matrix, aspects that govern debris flow be-havior, are studied via the morphological evolution of constituent particles. Four different mixtures of water and sediment with compositions resembling debris flows were prepared and put into a rotating drum, known as a Los Angeles standard abrasion machine, and studied at different time intervals. For each sampling time, quantitative shape analysis was performed using three morphological coefficients, MC_2, MC_(3-8), and MC_(30-34). Coefficient MC_2 gives information about particle ellipticity. MC_(3-8) is related to basic irregularities at a macro scale, such as roundness. MC30-34 is related to microscale irregularities like surface texture. Coefficient MC_(3-8) was shown to be very sensitive to silt content in the matrix, and coefficient MC_(30-34) to the presence of clay. All three coefficients point to the fact that changes in shape between granulometric classes are gradual and fol-low a power law. Coarse granulometric classes acquire more circular and smooth profiles while small particles maintain their irregular profiles. This phenomenon is the result of clast interaction processes within mixtures. Clast collisions between particles produce comminution of the coarsest fractions, while finer particles fracture along their entire surface. The rate at which these changes occur is related to the type of fine sediment present in the matrix. Changes in particle shape are an important tool for revealing internal dynamics because they are related to clast interaction and affect sedimentation processes inside these flows. This type of experiment, al-though not on a real scale, provides important physical information for understanding the phenomena that occur inside debris flows, enabling the study of a variety of textural parameters and their changes at regular time intervals. The experimental patterns observed offer new insights into clast-clast interaction, rounding and comminuting theory, with important implications for understanding Theological behavior and kinematics of flows and related hazards.
机译：提出了与泥石流动态行为有关的分析实验结果。通过组成颗粒的形态演变研究了颗粒相互作用以及基质中细粉含量的数量和类型，这些特征决定着泥石流的行为。准备了水和沉积物的四种不同混合物，其组成类似于泥石流，然后将其放入称为洛杉矶标准磨蚀机的转鼓中，并在不同的时间间隔进行研究。对于每个采样时间，使用三个形态系数MC_2，MC_（3-8）和MC_（30-34）进行定量形状分析。系数MC_2提供有关粒子椭圆度的信息。 MC_（3-8）与宏观上的基本不规则性（例如圆度）有关。 MC30-34与微小的不规则形状（如表面纹理）有关。系数MC_（3-8）对基质中的泥沙含量非常敏感，系数MC_（30-34）对粘土的存在非常敏感。所有这三个系数都表明，粒度级别之间的形状变化是渐进的，并且遵循幂定律。粗粒度分类获得更多的圆形和光滑轮廓，而小颗粒保持其不规则轮廓。这种现象是混合物中的相互作用相互作用的结果。粒子之间的碎裂碰撞会粉碎最粗糙的部分，而较细的粒子会沿其整个表面破裂。这些变化发生的速率与基质中细颗粒沉积物的类型有关。颗粒形状的变化是揭示内部动力学的重要工具，因为它们与岩屑相互作用有关，并影响这些流内部的沉积过程。这种类型的实验虽然不是真正的规模，但它提供了重要的物理信息，可帮助理解泥石流内部发生的现象，从而能够研究各种纹理参数及其在固定时间间隔的变化。观察到的实验模式提供了对熔岩-熔岩相互作用，四舍五入和混合理论的新见解，对理解流变的神学行为和运动学及相关危害具有重要意义。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号