Experimental Study on Impermeability Law of Aquiclude Reconstructed by Mudstone of External Dump in Arid Zone

In order to achieve the goal of ecological restoration, plant irrigation, and water retention in the external dump of open-pit coal mine in the arid desert area, it is proposed to use the mudstone in the stripped material to reconstruct the surface aquiclude and improve the water holding capacity of...

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Main Authors: Li Ma, Chendong Liu, Yinli Bi, Suping Peng, Kaisheng Jiang, Hui Zhang, Qiang Luo, Fei Xue, Tianxin Xu, Tianxiang Li, Jing Wu, Jiahao Tian, Dongxu Zhang
Format: Article
Language:English
Published: Hindawi Limited 2021-01-01
Series:Advances in Civil Engineering
Online Access:http://dx.doi.org/10.1155/2021/5561794
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spelling doaj-eb30ba92e8954ffca51b26f60ba02ef02021-05-31T00:33:13ZengHindawi LimitedAdvances in Civil Engineering1687-80942021-01-01202110.1155/2021/5561794Experimental Study on Impermeability Law of Aquiclude Reconstructed by Mudstone of External Dump in Arid ZoneLi Ma0Chendong Liu1Yinli Bi2Suping Peng3Kaisheng Jiang4Hui Zhang5Qiang Luo6Fei Xue7Tianxin Xu8Tianxiang Li9Jing Wu10Jiahao Tian11Dongxu Zhang12School of Energy EngineeringSchool of Energy EngineeringCollege of Geology and EnvironmentState Key Laboratory for Coal Resources and Safe MiningShenhua Xinjiang Qitai Energy Co., Ltd.International Exchange and Cooperation OfficeSchool of Energy EngineeringSchool of Energy EngineeringSchool of Energy EngineeringSchool of Energy EngineeringSchool of Energy EngineeringSchool of Energy EngineeringCCTEG Shenyang Research InstituteIn order to achieve the goal of ecological restoration, plant irrigation, and water retention in the external dump of open-pit coal mine in the arid desert area, it is proposed to use the mudstone in the stripped material to reconstruct the surface aquiclude and improve the water holding capacity of the topsoil. By taking the Hongshaquan Open-Pit Coal Mine as the study object, the red mudstone of mining level +650 was selected as the topsoil aquiclude material through the geological survey. XRD diffraction experiments are used to determine the composition of red mudstone including kaolinite mineral, quartz, potash feldspar, albite, and illite. The moisture content of the red mudstone is 4.16% as measured by the indoor drying experiment. And the particle size of 0.5 mm, 1 mm, and 2 mm and the thickness of 5 cm, 10 cm, and 20 cm rock samples were selected to conduct the indoor soil column experiment. Three indicators of initial infiltration rate, stable infiltration rate, and average infiltration rate were obtained according to the analysis and calculation of the water column drop rate, wet peak drop rate, and cumulative infiltration rate so that the permeability law and coefficient of each group of tests can be known. The finite element transient analysis theory and numerical simulation method were adopted to verify the results of physical experiments. The research results show that +650 level red mudstone has a strong antiseepage ability, and the smaller the particle size, the better the antiseepage performance. For 0.5 mm and 2 mm particle sizes, as the paving height increases, the water-proof effect is better. The laying height of 1 mm particle size has no obvious influence on the water barrier effect. The physical simulation was confirmed to have the same result trend as the numerical simulation, both of which are quadratic functions with the error within a reasonable range.http://dx.doi.org/10.1155/2021/5561794
collection DOAJ
language English
format Article
sources DOAJ
author Li Ma
Chendong Liu
Yinli Bi
Suping Peng
Kaisheng Jiang
Hui Zhang
Qiang Luo
Fei Xue
Tianxin Xu
Tianxiang Li
Jing Wu
Jiahao Tian
Dongxu Zhang
spellingShingle Li Ma
Chendong Liu
Yinli Bi
Suping Peng
Kaisheng Jiang
Hui Zhang
Qiang Luo
Fei Xue
Tianxin Xu
Tianxiang Li
Jing Wu
Jiahao Tian
Dongxu Zhang
Experimental Study on Impermeability Law of Aquiclude Reconstructed by Mudstone of External Dump in Arid Zone
Advances in Civil Engineering
author_facet Li Ma
Chendong Liu
Yinli Bi
Suping Peng
Kaisheng Jiang
Hui Zhang
Qiang Luo
Fei Xue
Tianxin Xu
Tianxiang Li
Jing Wu
Jiahao Tian
Dongxu Zhang
author_sort Li Ma
title Experimental Study on Impermeability Law of Aquiclude Reconstructed by Mudstone of External Dump in Arid Zone
title_short Experimental Study on Impermeability Law of Aquiclude Reconstructed by Mudstone of External Dump in Arid Zone
title_full Experimental Study on Impermeability Law of Aquiclude Reconstructed by Mudstone of External Dump in Arid Zone
title_fullStr Experimental Study on Impermeability Law of Aquiclude Reconstructed by Mudstone of External Dump in Arid Zone
title_full_unstemmed Experimental Study on Impermeability Law of Aquiclude Reconstructed by Mudstone of External Dump in Arid Zone
title_sort experimental study on impermeability law of aquiclude reconstructed by mudstone of external dump in arid zone
publisher Hindawi Limited
series Advances in Civil Engineering
issn 1687-8094
publishDate 2021-01-01
description In order to achieve the goal of ecological restoration, plant irrigation, and water retention in the external dump of open-pit coal mine in the arid desert area, it is proposed to use the mudstone in the stripped material to reconstruct the surface aquiclude and improve the water holding capacity of the topsoil. By taking the Hongshaquan Open-Pit Coal Mine as the study object, the red mudstone of mining level +650 was selected as the topsoil aquiclude material through the geological survey. XRD diffraction experiments are used to determine the composition of red mudstone including kaolinite mineral, quartz, potash feldspar, albite, and illite. The moisture content of the red mudstone is 4.16% as measured by the indoor drying experiment. And the particle size of 0.5 mm, 1 mm, and 2 mm and the thickness of 5 cm, 10 cm, and 20 cm rock samples were selected to conduct the indoor soil column experiment. Three indicators of initial infiltration rate, stable infiltration rate, and average infiltration rate were obtained according to the analysis and calculation of the water column drop rate, wet peak drop rate, and cumulative infiltration rate so that the permeability law and coefficient of each group of tests can be known. The finite element transient analysis theory and numerical simulation method were adopted to verify the results of physical experiments. The research results show that +650 level red mudstone has a strong antiseepage ability, and the smaller the particle size, the better the antiseepage performance. For 0.5 mm and 2 mm particle sizes, as the paving height increases, the water-proof effect is better. The laying height of 1 mm particle size has no obvious influence on the water barrier effect. The physical simulation was confirmed to have the same result trend as the numerical simulation, both of which are quadratic functions with the error within a reasonable range.
url http://dx.doi.org/10.1155/2021/5561794
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