Study on the Performance Evaluation Method and Application of Drainage Nonwoven Geotextile in the Yellow River Sediment Filling Reclamation Area

Huang Sun, Zhenqi Hu (), Deyun Song, Xinran Nie and Shuai Wang
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Huang Sun: College of Geosciences and Surveying Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China
Zhenqi Hu: College of Geosciences and Surveying Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China
Deyun Song: College of Geosciences and Surveying Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China
Xinran Nie: Key Laboratory of Poyang Lake Watershed Agricultural Resources and Ecology of Jiangxi Province, Jiangxi Agricultural University, Nanchang 330045, China
Shuai Wang: College of Geosciences and Surveying Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China

Land, 2024, vol. 13, issue 10, 1-14

Abstract: Technical challenges associated with drainage and filling efficacy confront the Yellow River sediment filling reclamation, a novel approach to reclaiming coal-mined subsided lands. This study proposes an improved geotextile performance evaluation method to address the shortcomings of current geotextile screening methodologies in the drainage of the Yellow River sediment. This method comprehensively considers essential characteristics under working conditions, such as permeability, soil conservation, and blockage prevention properties, including indicators such as the permeability coefficient and sediment retention rate of geotextiles under pressure. Indoor flume filling and drainage experiments were implemented to verify the efficacy of geotextile drainage. The improved method identified thermal-bonded nonwoven geotextiles of 200 and 250 g·m −2 as having the highest comprehensive evaluation scores. The experimental results showed that these geotextiles significantly improved their drainage efficiency and better met the specific requirements of the Yellow River sediment filling reclamation. Traditional screening methods may be unsuitable for sediment drainage conditions, necessitating sediment interception and rapid drainage due to the streaming water–sediment mixture. Therefore, the newly established performance evaluation method is more appropriate for the specific requirements. It is recommended that a simple vibrating device be installed to maintain 20 vibrations per minute to keep drainage channels clear and provide stable drainage performance in engineering applications.

Keywords: Yellow River sediment; filling reclamation; nonwoven geotextile; drainage; evaluation method and application (search for similar items in EconPapers)
JEL-codes: Q15 Q2 Q24 Q28 Q5 R14 R52 (search for similar items in EconPapers)
Date: 2024
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