Soil reconstruction and water-salt transport mechanism of waste dump in arid open-pit coal mine in Northwest China

The ecological restoration of mine dump is a major environmental problem faced by open-pit mining, and it is an important factor restricting the construction of green open-pit coal mine. Soil reconstruction is an important step in the ecological restoration of dumps. The northwest coal base, represe...

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Published inMéitàn xuébào Vol. 49; no. 3; pp. 1556 - 1569
Main Authors Kai ZHANG, Xiaonan LI, Kaikai BAO, Kaisheng JIANG, Xiaoyuan WANG, Xuying TAN
Format Journal Article
LanguageChinese
Published Editorial Office of Journal of China Coal Society 01.04.2024
Subjects
capillary water rising
coal gasification slag
red mudstone
soil reconstruction
water and salt transport
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Summary:The ecological restoration of mine dump is a major environmental problem faced by open-pit mining, and it is an important factor restricting the construction of green open-pit coal mine. Soil reconstruction is an important step in the ecological restoration of dumps. The northwest coal base, represented by Xinjiang, is characterized by water scarcity and salinization. Soil water and salt migration is a key indicator to determine the success of soil reconstruction. At present, the research focuses on the surface soil reconstruction to improve soil nutrients and promote plant growth. There are few studies on the functional soil reconstruction of water and salt control, and the mechanism of water and salt transportation under different soil reconstruction methods is still unclear. Based on the characteristics of coal resource endowment in Xinjiang, from the perspective of coal circular economy, this study used coal gasification slag (CGS), a by-product of energy and chemical industry, as a reconstruction materia
ISSN:0253-9993
DOI:10.13225/j.cnki.jccs.XH23.1457