Spatio-temporal evolution evaluation of geological environment of large open-pit coal mine areas in Xilin Gol league

被引：0
|
作者：
He H. [1 ]
Mu W. [2 ]
Zhang X. [1 ]
Song Y. [1 ]
Lü Y. [1 ]
Wu X. [1 ]
Ye B. [3 ]
Bai Z. [3 ]
机构：
[1] School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing
[2] School of Engineering and Technology, China University of Geosciences (Beijing), Beijing
[3] School of Land Science and Technology, China University of Geosciences (Beijing), Beijing
来源：
Earth Science Frontiers | 2024年 / 31卷 / 03期
关键词：
geological environment; hierarchical analysis; impact index model; open-pit coal mine areas; spatial; temporal evolution evaluation; vegetation coverage;
D O I：
10.13745/j.esf.sf.2023.6.28
中图分类号：
学科分类号：
摘要：
After more than 20 years of development in the large open-pit coal mine areas in Xilin Gol league, Inner Mongolia, a series of mining geological environmental problems have been generated and the geological environment of the mine area has been damaged to some extent, therefore, the evaluation of the spatial and temporal evolution of the geological environment of the large open-pit coal mine areas can provide a reference for the ecological and geological environment restoration of the mine areas. This study evaluates the spatial and temporal evolution of the geological environment in three large mining areas in Xilin Gol league. Firstly, through site investigation, it was clarified that the main mining geological environment problems in the study area mainly include four categories, such as vegetation coverage decline, land occupation (drainage field and industrial sites), topography landscape destruction (open-pit mining) and aquifer destruction. Then remote sensing images were used to quantitatively obtain information on mine geological environment problems between 2000 and 2020, and a mining geological environment evaluation index system was established. After that, the hierarchical analysis was applied to determine the weights of various geological environmental problems, and the impact index model based on GIS was used to evaluate and zone the impact of mine geological environment and explore the law of spatial and temporal evolution of mine geological environment. The results of the study show that: (1) The decreasing vegetation coverage, the area of the land occupied by the soil discharge site and the area of the open pit destroying the landscape of topography and geomorphology are increasing with time in the three large mining areas. (2) The impact of mining on the geological environment in the large mining area is divided into five class sub-areas: no impact area, slight impact area, general impact area, stronger impact area and strong impact area. (3) The spatial and temporal evolution pattern of the geological environment in the three large mining areas is basically the same, and the spatial distribution characteristics and the area change pattern of different impact areas with time are different. © 2024 Science Frontiers editorial department. All rights reserved.
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页码：443 / 457
页数：14
相关论文
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