基于弹塑性理论的溃坝尾矿砂下泄冲击力研究∗

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基于弹塑性理论的溃坝尾矿砂下泄冲击力研究∗

更新时间：2025-09-25

- 基于弹塑性理论的溃坝尾矿砂下泄冲击力研究∗
- Study on Impact of Dam Break Tailings Sand based on Elastomer Collision Theory
- 防灾减灾工程学报 2020年第1期页码：29-34
- 作者机构：
  
  中国水利水电科学研究院,北京,100038
- 作者简介：
- 基金信息：
  
  国家重点研发计划项目（2017YFC0804607）资助
- DOI：
  中图分类号： TV649
- 纸质出版：2020
- 稿件说明：
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蔡红,吴帅峰,魏迎奇,严俊,孙黎明.基于弹塑性理论的溃坝尾矿砂下泄冲击力研究∗[J].防灾减灾工程学报,2020,(1):29-34

CAI Hong. Study on Impact of Dam Break Tailings Sand based on Elastomer Collision Theory[J]. 2020, (1): 29-34.
蔡红,吴帅峰,魏迎奇,严俊,孙黎明.基于弹塑性理论的溃坝尾矿砂下泄冲击力研究∗[J].防灾减灾工程学报,2020,(1):29-34 DOI：

CAI Hong. Study on Impact of Dam Break Tailings Sand based on Elastomer Collision Theory[J]. 2020, (1): 29-34. DOI：

摘要

为确定溃坝尾矿砂下泄冲击力，以弹塑性力学为基础，从微粒弹性碰撞入手，建立单尾矿砂微粒的冲击模型，并扩展至团聚尾矿砂的冲击力求解模型，推导出均匀级配、固液耦合的冲击力计算公式。结果表明：单尾矿砂微粒可通过弹性力学理论描述碰撞过程、求解碰撞力和碰撞时间；尾矿砂团聚微粒的碰撞模型的构建应考虑液相的粘聚力、颗粒间的接触和局部力系向空间转化三个方面；冲击速度、平均粒径和含沙量对冲击力的影响均呈幂函数型增加，干密度呈线性增加，相同边界条件下，冲击速度的改变对冲击力的影响最大，平均粒径和含沙量次之，干密度影响最小，该结果代表了尾矿砂所特有的细颗粒、级配均匀所展现的特征，为尾矿砂下泄冲击计算提供理论依据。

Abstract

In order to determine the impact force of tailing sands advancing after dam-break

based on elastoplastic mechanics and starting from the elastic collision of particles

the impact model of single tailings particle is established and extended to the impact force solving model of aggregate tailing sands

in addition

the calculation formula for the impact force of uniformly-graded and solid-liquid coupling is derived. The results show that single tailings particle can describe the collision process

solve the collision force and collision time by means of elastic mechanics theory; The cohesion of liquid

the contact between particles and the transformation of local force system into space should be considered in the construction of collision model of tailings agglomerated particles; The influence of impact velocity

average particle size and sand content on impact force increases in power function

but that of dry density increases linearly

and under the same boundary conditions

the change of impact velocity has the greatest impact on impact force

average particle size and sand content are followed

and then finally the dry density

this reveals the characteristics displayed of fine particles and uniformly-graded that peculiar to tailing sands. And it provides a theoretical basis for the impact calculation of tailing sands advancing.

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references

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