研究PFC3D中位参数预测模型和基于半体机械合的回填强度模拟
Yong Wang1,2, Chen Cao3,4, Defeng Wang5
1School of Resources and Safety Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
Scientific reports
|December 9, 2025
概括
这项研究引入了一种用于预测水泥填充性能的新模型,将水化与机械性能联系起来. 该模型准确预测强度和变形,有助于高效的矿山设计.
科学领域:
- 地质技术工程 地质技术工程
- 计算力学 计算力学 计算力学
- 材料科学 是一种材料科学.
背景情况:
- 混凝土填充对矿山的稳定性至关重要.
- 准确预测其机械性能对于安全高效的采矿操作至关重要.
- 现有的模型往往缺乏对化学机械合的详细机制理解.
研究的目的:
- 开发和验证PFC3D.中水泥填充后的中参数预测模型.
- 为了建立水化程度和宏观机械性能之间的定量相关性.
- 为性能预测创建一个合的化学机械框架.
主要方法:
- 使用了PFC3D中的平行结合接触模型.
- 建立了介面尺度参数 (例如,刚度比,粘合参数) 和宏观性质 (例如,弹性模量,波松比,压力强度) 之间的关系.
- 开发了一个结合的化学机械框架,整合了水分,机械反应和中等尺度的参数.
主要成果:
- 在有效模量和宏观弹性模量之间发现了线性关系.
- 在刚度比率和Poisson比率之间发现了强烈的相关性.
- 压力强度显示取决于刚度和粘合参数.
- 模型与实验室测试的验证显示,强度的平均误差低于8.5%,变形的平均误差低于10%.
- 模拟的故障模式与实验观察结果相匹配.
结论:
- 开发的中参数模型准确地预测了在不同条件下水泥填充后的性能.
- 化学机械框架为参数的确定提供了机械基础.
- 该模型可靠地评估实际停止条件下的回填强度,支持预测建模.
相关概念视频
01:21Plastic Deformations of Members with a Single Plane of Symmetry
When a structural member undergoes plastic deformation due to bending, it is crucial to understand the position of the neutral axis and the stress distribution. This member, characterized by a single plane of symmetry, exhibits a uniform stress distribution, with negative stress above the neutral axis and positive stress below. Notably, the neutral axis does not align with the centroid of the cross-section. This misalignment is typical in cases where the cross-section is not rectangular or...
01:30Typical Model Studies
Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.