中国矿业大学胡振琪教授等：黄河泥沙充填复垦采煤塌陷地无纺土工布排水性能评估与关键过程模拟试验

阅读文章原文：http://ijabe.net/article/doi/10.25165/j.ijabe.20241706.8897

黄河泥沙充填复垦采煤塌陷地无纺土工布排水性能评估与关键过程模拟试验

孙煌1，胡振琪1,2*，宋德云1，王 帅1，余 益1

（1. 中国矿业大学（北京）土地复垦与生态重建研究所，北京100083，中国

2. 中国矿业大学环境与空间信息学院，徐州 221116，江苏，中国）

摘要：将淤积的黄河泥沙应用到缺土的采煤塌陷地复垦，解决了泥沙淤积与采煤塌陷地治理的双重问题，是一项绿色清洁技术。然而，排水问题成为主要挑战。通过在充填条带末端采用无纺布，成功解决了细颗粒泥沙流失和排水效率问题。

该研究探索并评估了不同规格无纺布在水分疏排中的有效性，并进行系统的评估和关键过程模拟试验，分析了在黄河泥沙充填复垦时排水中的关键过程障碍因素。

结果表明：1）通过等效孔径、渗透系数、梯度比等指标，实验表明，N1、N2、T1、T2、T3、T4型无纺布具有适宜的等效孔径和优越的渗透性，以及良好的防堵性能，理论上满足保土性、渗水性和防堵性。

2）排水无纺布淤堵的关键因素包括无纺布的等效孔径、厚度、垂直渗透系数、荷载承受能力、梯度比和泥沙截留率，这些因素需要在实际应用中通过室内试验进行综合考量以优化选择。

3）黄河泥沙充填排水中无纺布的选择应基于特定应用场景的工程需求，构建综合评价体系，涵盖保土性、透水性、防堵性以及补充性能指标，以确保所选材料满足特定技术要求并具有经济合理性。该研究为黄河泥沙充填复垦排水工程中土工布的筛选和应用提供了有效的见解，可推动黄河泥沙在矿山生态修复工程中的实际应用。

关键词：无纺土工布；排水性能；黄河泥沙；采煤塌陷地；充填复垦；工程建设

DOI：10.25165/j.ijabe.20241706.8897

引用信息： Sun H, Hu Z Q, Song D Y, Wang S, Yu Y. Evaluation of nonwoven geotextile drainage performance and experimental simulation of key processes in Yellow River sediment-backfilled reclaimed coal-mined subsided lands. Int J Agric & Biol Eng, 2024; 17(6): 193–201.

Evaluation of nonwoven geotextile drainage performance and experimental simulation of key processes in Yellow River sediment-backfilled reclaimed coal-mined subsided lands

Huang Sun1 , Zhenqi Hu1,2* , Deyun Song1 , Shuai Wang1 , Yi Yu1

(1. Institute of Land Reclamation and Ecological Restoration, China University of Mining and Technology-Beijing, Beijing 100083, China;

2. School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China)

Abstract：The innovative utilization of Yellow River sediment to reclaim coal-mined subsided lands addresses dual environmental challenges by offering a sustainable remediation technique. However, efficient water drainage constitutes a significant hurdle in this context. The strategic placement of nonwoven geotextile at the tail end of the fill sections has ameliorated fine sediment loss and drainage efficacy issues. This study assesses various nonwoven geotextile grades for their effectiveness in moisture expulsion, integrating comprehensive evaluations and simulation tests of pivotal processes. The findings reveal that selected nonwoven geotextiles (N1, N2, T1, T2, T3, T4) demonstrate appropriate apparent opening size (AOS) and permeability, coupled with clogging resistance, aligning with theoretical criteria for soil conservation, water permeation, and blockage prevention. Crucial to the nonwoven geotextile’s clogging are factors such as apparent opening size (AOS), thickness, permeability, load capacity, gradient ratio (GR), and sediment retention - all requiring meticulous selection for real-world application. The choice of nonwoven geotextile in the drainage of Yellow River sediment reclaimed lands must hinge on a holistic assessment framework, encompassing retention, permeability, anti-clogging attributes, and additional performance metrics, to ensure that the materials fulfill the specific technical standards while remaining cost-effective. This study provides valuable insights into the selection and application of geotextiles in Yellow River sediment-backfilled reclamation drainage projects, contributing to the advancement of mine ecological restoration practices, particularly in the context of Yellow River sediment-backfilled reclamation projects.

Keywords: nonwoven geotextile, drainage performance, Yellow River sediment, coal-mined subsided land, filling reclamation, engineering construction

DOI: 10.25165/j.ijabe.20241706.8897

Citation:Sun H, Hu Z Q, Song D Y, Wang S, Yu Y. Evaluation of nonwoven geotextile drainage performance and experimental simulation of key processes in Yellow River sediment-backfilled reclaimed coal-mined subsided lands. Int J Agric & Biol Eng, 2024; 17(6): 193–201.