[1]YOU Yang,TIAN Peng,YANG Wenjin,et al.Influence of Coal Mining Subsidence on Sandy Geomorphology and Vegetation Habitat in Sandy Area[J].Research of Soil and Water Conservation,2021,28(02):88-92+98.
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Influence of Coal Mining Subsidence on Sandy Geomorphology and Vegetation Habitat in Sandy Area
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 02
Page number:
88-92+98
Column:
Public date:
2021-02-06
- Title:
- Influence of Coal Mining Subsidence on Sandy Geomorphology and Vegetation Habitat in Sandy Area
- CLC:
- X37
- DOI:
- -
- Abstract:
- In order to explore the ‘secondary desertification' problems and countermeasures caused by coal mining subsidence in the arid and semi-arid sandy area, through field partition quadrat survey, using statistical methods, detailed research on the subsidence collapse edge, the central subsidence and subsidence basin led to the collapse of central crack width and strewn at random, the vegetation of displacement and tilt, dry sand and wind erosion/wind laid situation has carried out. The results show that the width and density of cracks are the smallest in the margin of collapse, the second in the middle of collapse, and the largest in the basin of collapse, whereas the changes of fracture staggering and surface damage are the opposite; the average displacement length of vegetation in the subsidence area is more than 60 cm, and the change of tilt rate is between 5.67 and 28.63; the average depth of main wind erosion/wind laid is up to -30.52 cm/+25.41 cm, which is the most serious in the collapse margin; the displacement length and change of tilt rate of vegetation are in positive linear correlation with the height of collapse fracture and the fragmentation of surface; the average thickness of the dry sand layer at the collapse edge was more than 14 cm, which increased by 4～6 cm compared with the control, while the changes in the central subsidence and the subsidence basin were about 11 cm, which increased by 1～4 cm compared with the non-collapse; the wind erosion rate of the collapse edge is as high as 83.34%, followed by 52.06% in the central subsidence, and is 51.84% in subsidence basin. The comprehensive analysis shows that the collapse edge has the strongest impact on sandy land surface and vegetation habitat, and is the key area for ecological restoration. It is suggested to carry out zonal control in time after coal mining collapse and take appropriate measures to avoid the occurrence of ‘secondary desertification' in the subsidence area.
- References:
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Last Update:
2021-02-10