Soil Preferential Flow Characteristics in Coal Mine Subsidence Area under Different Rainfall Duration

GUO Qiaoling; HU Qian; DAI Bin; YUAN Yizhe; PENG Zikang

doi:10.13870/j.cnki.stbcxb.2025.01.026

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Soil Preferential Flow Characteristics in Coal Mine Subsidence Area under Different Rainfall Duration

更新时间：2025-03-14

- Soil Preferential Flow Characteristics in Coal Mine Subsidence Area under Different Rainfall Duration
- Vol. 39, Issue 1, Pages: 130-140(2025)
- 作者机构：
  
  1. 东华理工大学水资源与环境工程学院,南昌,330013
  2. 地下水污染成因与修复江西省重点实验室,南昌,330013
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2025.01.026
  CLC： X132
- Published：2025
- 稿件说明：
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GUO Qiaoling, HU Qian, DAI Bin, et al. Soil Preferential Flow Characteristics in Coal Mine Subsidence Area under Different Rainfall Duration[J]. 2025, 39(1): 130-140.
DOI：

GUO Qiaoling, HU Qian, DAI Bin, et al. Soil Preferential Flow Characteristics in Coal Mine Subsidence Area under Different Rainfall Duration[J]. 2025, 39(1): 130-140. DOI： 10.13870/j.cnki.stbcxb.2025.01.026.

摘要

目的为研究采煤塌陷区裂缝引发的优先流特征，为科学合理地开展矿区水资源管理及生态治理实践工作提供支撑。方法在神府-东胜煤田采煤塌陷区选取3条同一宽度(3 cm)的裂缝，开展相同降雨强度、不同降雨历时的染色示踪试验。采用Adobe Photoshop 2020、Image Pro Plus 6.0、SketchUp Pro 2019、Auto CAD 2019等处理软件，分析不同降雨历时下的裂缝优先流特征。结果 1) 神府-东胜采煤塌陷区优先流发生区域的土壤水分体积分数、孔隙度、饱和导水率大于非优先流区域，体积质量和田间持水量小于非优先流区域；2)降雨历时分别为10、20、30 min时，相应的基质流深度分别为5、8、10 cm；优先流发育深度分别为26.4、47.7、44.3 cm。降雨历时越长，基质流和优先流发育越深；3)各试验点染色面积比均随着土层深度增加呈减小趋势，形态上表现为S形状。当降雨历时较短时，染色面积比随着土层深度变化的幅度较小；当降雨历时较长时，染色面积比曲线波动增大。4)总体上，随着土层深度增加，宽染色路径的数量在减少，细小染色路径数量增加，染色路径总数呈先增加后减小趋势。且降雨历时越长，相同深度处土壤染色路径越宽，宽路径数量越多。结论研究成果可为煤炭矿区土地复垦和生态治理提供科学依据。

Abstract

Objective Research on the preferential flow characteristics triggered by cracks in coal mining subsidence areas can provide support for scientific and rational development of water resource management and ecological management practice in the mining area.Methods Three cracks of the same width (3 cm) were selected in the coal mining subsidence area of Shenfu-Dongsheng Coal Field to carry out the staining tracer test under the same rainfall intensity and different rainfall durations. Processing software such as Adobe Photoshop 2020

Image Pro Plus 6.0

SketchUp Pro 2019

and Auto CAD 2 019 were used to analyze the preferential flow characteristics of cracks under different rainfall durations.Results 1) Soil volumetric water content

porosity

and saturated hydraulic conductivity in the preferential flow occurrence area of the Shenfu-Dongsheng coal mining subsidence area were greater than those in the non-preferential flow area

and the volumetric weight and field water-holding capacity were less than those in the non-preferential flow area zone. 2) When the rainfall duration was 10

20 and 30 min

the corresponding depths of substrate flow were 5

8 and 10 cm

respectively

while the depths of preferential flow were 26.4

47.7 and 44.3 cm

respectively. The longer the rainfall duration

the deeper the development of substrate and preferential flow. 3) The staining area ratio at each test site showed a decreasing trend with the increase of soil depth

and the morphology showed an S shape. When the rainfall duration was short

the magnitude of change in the coloring area ratio with soil depth was small; when the rainfall duration was long

the fluctuation of the coloring area ratio curve increased. 4) In general

with the increase of soil depth

the number of wide staining paths decreased

the number of fine staining paths increased

and the total number of staining paths showed a tendency of increasing first and then decreasing. The longer the rainfall duration

the wider the soil staining paths at the same depth was

and there were more wide paths.Conclusion The findings can provide a scientific basis for land reclamation and ecological management in coal mining areas.

关键词

Keywords

references

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