关键词: 生态修复, 废弃矿区, 资源再利用, 价值评估

Abstract: Resource reuse valuation of ecological restoration in abandoned mining areas is one of the hotspots in urban sustainable development research. We assessed resource reuse value of ecological restoration in abandoned mining areas in Xuzhou City. Based on analysis of ecological vulnerability, we firstly estimated insured value of disaster prevention for eliminating geological disasters hidden troubles through ecological restoration. By analyzing the spatiotemporal change of land cover before and after ecological restoration, through market value method and shadow project method, we estimated supply increment, valueadded benefits and environmental value effect of urban construction land in abandoned mining areas including abandon pits and coal mining subsidence, and ecosystem service value of other land types. The results showed that the ecological elasticity index of representational region is up to 0.72, which belongs to high fragility. As a result of ecological restoration, insured value of disaster prevention is 2.661 billion yuan in urban abandoned mining areas, the number of disaster prevention beneficiary group increased from 1540 to 12290, with a growth rate of 698%. Land supply increment of urban construction land is 226.81 hectares, with the value-added benefits of 1.778 billion yuan (price in 2015). Ecosystem services value of abandoned mining areas was 89.64 million yuan in 2015, a 28% increase compared to 69.96 million yuan in 2005. This study reveals that enhancing disaster prevention capability for eliminating geological disasters and optimizing environment through ecological restoration is the main way of resource reuse in abandoned mining areas, and an important path to achieve sustainable development in resourcesbased cities.

Key words: ecological restoration, abandoned mining area, resource reuse, value assessment.