Abstract
The restoration of open-pit mining coal mine areas is imminent, and it is of great significance to put forward a set of reasonable restoration concepts. According to the geographical location and economic conditions of the mining areas, this paper combines multiple restoration concepts and measures such as “fundamental reforestation”, “near-natural restoration”, “introduction of agricultural and forestry industries” and “development of cultural tourism in abandoned land” in a scientific way, the combination has been successfully applied in the restoration and comprehensive utilization project in an open-pit coal mine area in Datong, Shanxi, China. This concept realizes the reuse of abandoned open-pit coal mines and closely follows the national strategy of poverty alleviation and rural revitalization, in pursuit of the national vision of “clear waters and green mountains are mountains of gold and silver.”
Highlights
In recent years, coal resources still occupy an important position in China's energy structure
John [3] believes that the ecological restoration of open-pit mining areas should rely on scientific theories and technologies, and improving the public's awareness of environmental protection and strengthening environmental management, achieving the restoration of open-pit mining areas in terms of both technology and management
The current restoration of open-pit mining areas mainly includes: greening of openpit mining areas [9], land reclamation [10], ecotourism, botanical parks[11], etc., and have achieved good results in practical applications, actual engineering projects lacks applicable conditions for the repair methods of open-pit mining areas and the proper concept and methodology under the guidance of the national strategy in the new era, by taking a mine repair project in Datong, Shanxi as an example, this paper proposes a repair-and-reuse system for open-pit mining areas, accumulating experience for future mine restoration projects
Summary
Coal resources still occupy an important position in China's energy structure. Since the 1970s, the environmental management of open-pit mining has been discussed as a major issue at home and abroad [2]. Due to the special geological structure and composition of coal mines, the process of coal mining will artificially form dumps, gangues, and open pits, etc.[4] If mining is not strictly performed in accordance with guiding principles, the open pit mining process often causes environmental issues such as soil and water loss, ground subsidence of pits, destruction of biodiversity, and pollution of groundwater by chemical-containing wastewater in the mining process, which has a great impact on the ecological environment, resulting in geological disasters such as mudslide, open-pit mining slope sliding, etc., [5,6,7] which severely endanger the normal life and economic development of local residents. Experts and scholars at home and abroad have conducted targeted research on the issues of subsidence areas, fly ash yards, barrows, contaminated soil and water in open-pit coal mining areas through methods such as classification statistics, management modeling, and analogy, achieving certain success in some areas. The current restoration of open-pit mining areas mainly includes: greening of openpit mining areas [9], land reclamation [10], ecotourism, botanical parks[11], etc., and have achieved good results in practical applications, actual engineering projects lacks applicable conditions for the repair methods of open-pit mining areas and the proper concept and methodology under the guidance of the national strategy in the new era, by taking a mine repair project in Datong, Shanxi as an example, this paper proposes a repair-and-reuse system for open-pit mining areas, accumulating experience for future mine restoration projects
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