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›› 2020, Vol. 37 ›› Issue (4): 442-449.DOI: 10.7523/j.issn.2095-6134.2020.04.002

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Influence of underground coal mining on soil fertility quality in the northwestern arid and semi-arid regions: a review

MA Kang1, YANG Fan2, ZHANG Yuxiu1   

  1. 1. School of Chemical and Environmental Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China;
    2. Zaoquan Coal Mine, Shenhua Ningxia Coal Group, Yinchuan 750410, China
  • Received:2019-06-03 Revised:2019-08-02 Online:2020-07-15
  • Supported by:
     

Abstract: The arid and semi-arid regions are typically ecologically fragile areas in China. Underground coal mining caused geological structure damage and surface deformation, resulting in land subsidence and ground fissures, and further leading to an increase in soil sand content and porosity, as well as a decrease in soil water retention capacity. Moreover, the loss of soil nutrients is triggered, the microbial community is disturbed, and soil enzyme activity is also affected. The soil fertility quality might be reduced ultimately by the mining. This paper mainly focuses on the mechanism of coal mining subsidence and change trend of soil structure, based on the effects of coal mining on soil physical, chemical, and biological properties, the mechanism of underground coal mining on soil fertility quality in the northwestern arid and semi-arid regions was discussed. The results have an important theoretical significance for accelerating the restoration of mining subsidence soil, development of land reclamation technology and ecological environment protection.

 

Key words: arid and semi-arid desert regions, ecologically fragile areas, coal mining subsidence, soil quality

CLC Number: