Combined Treatments of Underground Coal Slurry: Laboratory Testing and Field Application

During the coal mining process, underground water is generated from the longwall face. In the meantime, the coal cutting process would produce coal particles. Coal slurry is generated in the underground working site, especially for water abundant coal mines. The generated coal slurry is treated to p...

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Autores principales: Xinguo Zhang, Yue Dong, Jinhai Zhao, Bin Gong, Zixuan Meng, Jia Lin
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Lenguaje:EN
Publicado: MDPI AG 2021
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Acceso en línea:https://doaj.org/article/b31002711d2e4887bd15d508657cd8b7
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spelling oai:doaj.org-article:b31002711d2e4887bd15d508657cd8b72021-11-11T19:55:55ZCombined Treatments of Underground Coal Slurry: Laboratory Testing and Field Application10.3390/w132130472073-4441https://doaj.org/article/b31002711d2e4887bd15d508657cd8b72021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4441/13/21/3047https://doaj.org/toc/2073-4441During the coal mining process, underground water is generated from the longwall face. In the meantime, the coal cutting process would produce coal particles. Coal slurry is generated in the underground working site, especially for water abundant coal mines. The generated coal slurry is treated to prevent water pollution. Due to the extensively existing of the suspended solid, the traditional process method would often introduce new problems. In this study, laboratory testing was conducted to investigate the characteristics, including the particle size distribution of the coal sludge, coal slurry compositions, slurry viscosity and coal mine water quality. In order to improve the coal slurry treatment efficiency, based on the laboratory results, a novel combined treatment of underground coal slurry is proposed. First, the coarse grained coal slurry is process by a vibrating screening machine. Then, the coal slurry containing fine coal powders is processed through a settling pond. The sedimentation results of the coal solid materials are analyzed. The polymer flocculant is also added into the coal slurry to improve the sedimentation. These combined treats of the coal slurry significantly remove the suspended solid and improve the quality of the coal mine water. Based on the laboratory testing, the specific details of the field applications are designed. The key novelty of this paper is the underground background. All of these treatments are based on the underground environment and are capable of being applied in underground workings. From field applications and observations, these novel combined treatments of coal slurry in the underground site are effective. This study provides a novel method to treat the coal slurry, which has innovations from engineering aspect. These procedures are useful for the underground coal slurry treatment, especially for water-abundant coal mines. The normal coal production is guaranteed and less affected by the coal slurry discharge process. Meanwhile, the water pollution problem is much addressed and the damage of coal slurry to the environment is reduced.Xinguo ZhangYue DongJinhai ZhaoBin GongZixuan MengJia LinMDPI AGarticlecoal slurryparticle sizemine waterpolymer flocculantfield applicationviscosityHydraulic engineeringTC1-978Water supply for domestic and industrial purposesTD201-500ENWater, Vol 13, Iss 3047, p 3047 (2021)
institution DOAJ
collection DOAJ
language EN
topic coal slurry
particle size
mine water
polymer flocculant
field application
viscosity
Hydraulic engineering
TC1-978
Water supply for domestic and industrial purposes
TD201-500
spellingShingle coal slurry
particle size
mine water
polymer flocculant
field application
viscosity
Hydraulic engineering
TC1-978
Water supply for domestic and industrial purposes
TD201-500
Xinguo Zhang
Yue Dong
Jinhai Zhao
Bin Gong
Zixuan Meng
Jia Lin
Combined Treatments of Underground Coal Slurry: Laboratory Testing and Field Application
description During the coal mining process, underground water is generated from the longwall face. In the meantime, the coal cutting process would produce coal particles. Coal slurry is generated in the underground working site, especially for water abundant coal mines. The generated coal slurry is treated to prevent water pollution. Due to the extensively existing of the suspended solid, the traditional process method would often introduce new problems. In this study, laboratory testing was conducted to investigate the characteristics, including the particle size distribution of the coal sludge, coal slurry compositions, slurry viscosity and coal mine water quality. In order to improve the coal slurry treatment efficiency, based on the laboratory results, a novel combined treatment of underground coal slurry is proposed. First, the coarse grained coal slurry is process by a vibrating screening machine. Then, the coal slurry containing fine coal powders is processed through a settling pond. The sedimentation results of the coal solid materials are analyzed. The polymer flocculant is also added into the coal slurry to improve the sedimentation. These combined treats of the coal slurry significantly remove the suspended solid and improve the quality of the coal mine water. Based on the laboratory testing, the specific details of the field applications are designed. The key novelty of this paper is the underground background. All of these treatments are based on the underground environment and are capable of being applied in underground workings. From field applications and observations, these novel combined treatments of coal slurry in the underground site are effective. This study provides a novel method to treat the coal slurry, which has innovations from engineering aspect. These procedures are useful for the underground coal slurry treatment, especially for water-abundant coal mines. The normal coal production is guaranteed and less affected by the coal slurry discharge process. Meanwhile, the water pollution problem is much addressed and the damage of coal slurry to the environment is reduced.
format article
author Xinguo Zhang
Yue Dong
Jinhai Zhao
Bin Gong
Zixuan Meng
Jia Lin
author_facet Xinguo Zhang
Yue Dong
Jinhai Zhao
Bin Gong
Zixuan Meng
Jia Lin
author_sort Xinguo Zhang
title Combined Treatments of Underground Coal Slurry: Laboratory Testing and Field Application
title_short Combined Treatments of Underground Coal Slurry: Laboratory Testing and Field Application
title_full Combined Treatments of Underground Coal Slurry: Laboratory Testing and Field Application
title_fullStr Combined Treatments of Underground Coal Slurry: Laboratory Testing and Field Application
title_full_unstemmed Combined Treatments of Underground Coal Slurry: Laboratory Testing and Field Application
title_sort combined treatments of underground coal slurry: laboratory testing and field application
publisher MDPI AG
publishDate 2021
url https://doaj.org/article/b31002711d2e4887bd15d508657cd8b7
work_keys_str_mv AT xinguozhang combinedtreatmentsofundergroundcoalslurrylaboratorytestingandfieldapplication
AT yuedong combinedtreatmentsofundergroundcoalslurrylaboratorytestingandfieldapplication
AT jinhaizhao combinedtreatmentsofundergroundcoalslurrylaboratorytestingandfieldapplication
AT bingong combinedtreatmentsofundergroundcoalslurrylaboratorytestingandfieldapplication
AT zixuanmeng combinedtreatmentsofundergroundcoalslurrylaboratorytestingandfieldapplication
AT jialin combinedtreatmentsofundergroundcoalslurrylaboratorytestingandfieldapplication
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