Land reshaping method of imitating natural geomorphology for open-pit mine dump in eastern grassland area of China

被引：0
|
作者：
Li S. [1 ]
Guo X. [1 ]
Li X. [1 ]
Sun Z. [1 ]
Yan J. [2 ,3 ]
机构：
[1] Beijing Research Institute of Land Renovation and Ecological Restoration Science and Technology, China Coal Technology & Engineering Group, Beijing
[2] Tangshan Research Institute, China Coal Technology & Engineering Group, Tangshan
[3] Tiandi(Tangshan) Mining Science and Technology Company Ltd., Tangshan
来源：
Meitan Xuebao/Journal of the China Coal Society | 2019年 / 44卷 / 12期
关键词：
Dump slope; Eastern grassland area; Natural topography shaping; Normalized vegetation index; Stability safety factor;
D O I：
10.13225/j.cnki.jccs.SH19.1278
中图分类号：
学科分类号：
摘要：
The eastern grassland area is a large-scale coal-fired power base dominated by open-pit mining in China. Due to its fragile ecological environment, the slope of the dumping site in open-pit mining is prone to landslide, subsidence and collapse. Therefore, the slope shape of dump is of significance to the protection of ecological environment and the sustainable development of mining industry. In order to explore a more scientific method for the slope shaping of open-pit dump, in this study, a normalized difference vegetation index (NDVI) and slope stability analysis are used to compare the effects of three slope shaping methods (step type, slope type and wave type, which the wave type and slope type are designed by imitating natural landform) in the external dumping site of the Baori Hiller open-pit mine. The results show that ① the NDVI index of different shaped slope is wave type (NDVI=0.551)>slope type (NDVI=0.475)>step type (NDVI=0.340), but all of them are smaller than that of the surrounding natural topography, the plant growth of wave shaped slope is better than that of slope and step shaped slope; ② the high step plant coverage is low. On the low step (650 m platform >660 m platform >670 m platform), the water loss of the low step slope is less than that of the high step; ③ the slope stability is negatively correlated with the slope angle, and the stability of different shaping slopes is realized as wave slope type slope (F=2.711)>Slope type (F=2.513)>step type (F=1.073), the wave type and slope type slope are all within the safe range, and the step slope landslide is basically stable; ④ the NDVI and stability coefficient of three types of slope shape have the same trend, the higher the vegetation coverage, the higher the slope stability. The wave-shaped shaping method of the natural dump of the excavation field outside the Baori Hiller open-pit mine has the best effect. © 2019, Editorial Office of Journal of China Coal Society. All right reserved.
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页码：3636 / 3643
页数：7
相关论文
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