长江流域资源与环境 >> 2022, Vol. 31 >> Issue (6): 1370-1380.doi: 10.11870/cjlyzyyhj202206017

• 生态环境 • 上一篇    下一篇

1973~2020年淮北市采煤塌陷区时空变化及其影响研究

刘沁萍1,李欢1,田洪阵1*,魏娜1,杨萌萌2,乔荣锋3   

  1. (1.天津工业大学经济与管理学院,天津 300387;2.国立釜山大学土木与环境工程系,韩国 釜山 46241;3.天津工业大学环境科学与工程学院,天津 300387)
  • 出版日期:2022-06-20 发布日期:2022-07-11

Spatio-temporal Changes in Coal Mining Subsidence and Their Impacts in Huaibei from 1973 to 2020 

LIU Qin-ping1, LI Huan1, TIAN Hong-zhen1, WEI Na1, YANG Meng-meng2, QIAO Rong-feng3   

  1. (1. School of Economics and Management, Tiangong University, Tianjin 300387, China; 2. Department of Civil and Environmental Engineering, Pusan National University, Pusan 46241, Republic of Korea; 3. School of Environmental Science and Engineering, Tiangong University, Tianjin 300387, China)
  • Online:2022-06-20 Published:2022-07-11

摘要: 煤炭是重要的能源,但是在开采后形成的地表沉陷特别是塌陷在平原地区造成了对耕地和建设用地的巨大破坏,对粮食产量、植被覆盖和塌陷区居民的生产、居住、生活产生了重大影响。利用Landsat MSS、TM、ETM+和OLI影像,通过目视解译获取了1973~2020年6个时段的淮北市采煤塌陷区的边界信息,通过监督分类和目视修正提取了5个时段的土地利用信息,分析了塌陷区的时空变化特征及其对土地利用、植被覆盖等的影响。结果表明:(1)虽然塌陷区被不断地回填,但是塌陷区的数量和总面积在近50 a里不断增加,在2020年共有塌陷区243个,总面积约1.2万hm2。(2)塌陷的土地以耕地为主,建设用地其次,塌陷的耕地面积呈现增加趋势。(3)塌陷区回填的规模不断扩大,回填后主要用作建设用地,其次是耕地。塌陷导致了农民失去土地、搬迁,粮食产量减少,同时也破坏了地表植被。研究成果可以为塌陷区的管理、开发、利用等提供科学支撑。

Abstract: Coal is an important energy source, but the surface subsidence formed after coal mining, especially in the subsidence areas, has caused significant damage to cultivated and construction land on the plain areas, impacting food production, vegetation cover and the production, housing and living conditions of residents in the subsidence areas. We used Landsat MSS, TM, ETM+, and OLI images to obtain outlines of coal mining subsidence areas in Huaibei over 6 periods from 1973 to 2020 through visual interpretation. We also extracted land use information over 5 periods through supervision classification and visual correction. The spatio-temporal changes in coal mining subsidence and their impacts on landuse and vegetation cover were analyzed. Although the subsidence areas are being continuously reclaimed, the number and total area of the subsidence areas have been increasing in the past ~50 years. In 2020, there are 243 coal mining subsidence areas with a total area of ~12 000 hm2. The collapsed land is mainly cultivated land, followed by construction land, and the area of collapsed cultivated land shows an increasing trend. The scale of land reclamation in the subsidence areas continues to expand. After reclamation, it is mainly used as construction land, followed by cultivated land. The collapse has caused farmers to lose their land, people to relocate, and reduction of grain production. At the same time, it also has damaged the vegetation. The results could be used to support the management, development and exploitation of collapsed land.

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