Experimental Study on Flow Velocity and Its Influence Factors on Abandoned Dreg Slope in Shenfu Coalfield

DONG Yukun; WANG Wenlong; HUANG Yimei; OUYANG Chaobo

doi:10.13961/j.cnki.stbctb.2016.04.027

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Experimental Study on Flow Velocity and Its Influence Factors on Abandoned Dreg Slope in Shenfu Coalfield

- Experimental Study on Flow Velocity and Its Influence Factors on Abandoned Dreg Slope in Shenfu Coalfield
- Bulletin of Soiland Water Conservation Vol. 36, Issue 4, Pages: 148-151(2016)
- 作者机构：
  
  1. 西北农林科技大学资源环境学院, 陕西杨凌,712100
  2. 土壤侵蚀与旱地农业国家重点实验室, 陕西杨凌,712100
  3. 中国科学院水利部水土保持研究所, 陕西杨凌,712100
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2016.04.027
  CLC：
- Published：2016
- 稿件说明：
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DONG Yukun, WANG Wenlong, HUANG Yimei, et al. Experimental Study on Flow Velocity and Its Influence Factors on Abandoned Dreg Slope in Shenfu Coalfield[J]. Bulletin of Soiland Water Conservation, 2016, 36(4): 148-151.
DOI：

DONG Yukun, WANG Wenlong, HUANG Yimei, et al. Experimental Study on Flow Velocity and Its Influence Factors on Abandoned Dreg Slope in Shenfu Coalfield[J]. Bulletin of Soiland Water Conservation, 2016, 36(4): 148-151. DOI： 10.13961/j.cnki.stbctb.2016.04.027.

摘要

[目的] 研究弃土弃渣体坡面流速变化规律及砾石含量、坡度、放水流量、含沙量对坡面流速的影响，为揭示弃土弃渣体侵蚀机理提供科学依据。[方法] 采用野外放水冲刷试验方法研究神府煤田弃土弃渣坡面流速。[结果] 弃土弃渣体在不同放水流量下平均流速随产流历时会在一定的范围内波动，表现为多谷多峰的特点，而且随放水流量增大，断面内平均流速波动程度增强。弃土弃渣体坡面流速与弃土弃渣体中砾石含量、放水流量及含沙量均呈显著的幂函数关系，与坡度呈显著的二次函数关系。逐步回归分析表明，砾石含量和放水流量的共同作用对弃土弃渣体坡面流速的影响最为显著。[结论] 弃土弃渣体坡面流速变化复杂，砾石含量和上方来水是影响流速的最关键因素。

Abstract

[Objective] The slope flow velocity in abandoned dreg site and the effects of gravel content

slope gradient

water flows discharge

and sediment concentration on it were demonstrated to provide scientific reference for revealing the erosion mechanism on dreg site. [Methods] Field scouring experiment was carried out to study the velocity of residue slop in Shenfu Coalfield. [Results] Results showed that flow velocity experienced fluctuated processes within a certain range on all flow discharge conditions. The velocity along discharge time was multi-valley multimodal

and its fluctuation range observed in flow sections increased with the increase of discharge amount. Power function could be used to describe the relationships between flow velocity and the influence factors

including gravel content

flow discharge and sediment concentration. Quadratic power function could express the relationship between velocity and slope gradient. Stepwise regression analysis showed both flow discharge and gravel content significantly influenced flow velocity. [Conclusion] Variation of flow velocity on abandoned dreg slope was complicated. Gravel amount and upstream catchment area were two key factors influencing flow velocity.

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references

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