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Utilization of fly ash nano-composite coated jute geotextile as a reinforcement material in the stabilization of coal mine overburden dump slopes.

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Title: Utilization of fly ash nano-composite coated jute geotextile as a reinforcement material in the stabilization of coal mine overburden dump slopes.
Authors: Chakraborty, Tapabrata1 (AUTHOR) tapa855.blp@gmail.com, Pal, Supriya1 (AUTHOR), Mandal, Mrinal Kanti2 (AUTHOR)
Source: Sādhanā: Academy Proceedings in Engineering Sciences. Jun2026, Vol. 51 Issue 2, p1-17. 17p.
Subjects: Geotextiles, Slope stability, Strength of materials, Hydrophobic surfaces, Coal mine waste, Nanostructured materials, Geotechnical engineering
Geographic Terms: India
Abstract: The increasing power requirement in India has driven the expansion of open-cast coal mining, leading to considerable overburden (OB) generation. Managing OB presents challenges due to slope instability and spatial constraints, particularly in high stripping ratio mines. This study explores the potential of nano-composite coated jute geotextile (JGT) as a reinforcement material to enhance OB dump stability and accommodate larger volumes. A composite coating of polymethyl methacrylate (PMMA), polystyrene (PS), and fly ash fillers significantly improved JGT's mechanical properties. Tensile strength increased by 55.7% in the machine direction (MD) and 51.0% in the cross-machine direction (XMD) without compromising porosity. The coated JGT exhibited hydrophobic characteristics, with a water contact angle (WCA) of 110.6° and a higher interface friction angle, improving slope stability. Durability tests showed that coated JGT retained 91.2% tensile strength after six months of low-pH water exposure, while untreated JGT fully degraded. Geotechnical centrifuge modeling demonstrated an 89.56% reduction in settlement at the crest and complete elimination of settlement on the slope face with reinforcement. Numerical modeling indicated a 6.25% increase in the factor of safety, enabling steeper and taller OB dumps, thereby increasing slope capacity by 18.98%. Large-scale production of nano-composite coated JGT has been successfully implemented, ensuring quality consistency. Cost analysis highlights significant savings, positioning nano-composite coated JGT as a cost-effective, sustainable alternative to synthetic geotextiles. This innovative approach offers a robust solution for stabilizing OB dumps in coal mining, addressing both environmental and economic concerns. [ABSTRACT FROM AUTHOR]
Copyright of Sādhanā: Academy Proceedings in Engineering Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Utilization of fly ash nano-composite coated jute geotextile as a reinforcement material in the stabilization of coal mine overburden dump slopes.
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  Label: Abstract
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  Data: The increasing power requirement in India has driven the expansion of open-cast coal mining, leading to considerable overburden (OB) generation. Managing OB presents challenges due to slope instability and spatial constraints, particularly in high stripping ratio mines. This study explores the potential of nano-composite coated jute geotextile (JGT) as a reinforcement material to enhance OB dump stability and accommodate larger volumes. A composite coating of polymethyl methacrylate (PMMA), polystyrene (PS), and fly ash fillers significantly improved JGT's mechanical properties. Tensile strength increased by 55.7% in the machine direction (MD) and 51.0% in the cross-machine direction (XMD) without compromising porosity. The coated JGT exhibited hydrophobic characteristics, with a water contact angle (WCA) of 110.6° and a higher interface friction angle, improving slope stability. Durability tests showed that coated JGT retained 91.2% tensile strength after six months of low-pH water exposure, while untreated JGT fully degraded. Geotechnical centrifuge modeling demonstrated an 89.56% reduction in settlement at the crest and complete elimination of settlement on the slope face with reinforcement. Numerical modeling indicated a 6.25% increase in the factor of safety, enabling steeper and taller OB dumps, thereby increasing slope capacity by 18.98%. Large-scale production of nano-composite coated JGT has been successfully implemented, ensuring quality consistency. Cost analysis highlights significant savings, positioning nano-composite coated JGT as a cost-effective, sustainable alternative to synthetic geotextiles. This innovative approach offers a robust solution for stabilizing OB dumps in coal mining, addressing both environmental and economic concerns. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Sādhanā: Academy Proceedings in Engineering Sciences is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s12046-026-03119-3
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      – Code: eng
        Text: English
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        PageCount: 17
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      – SubjectFull: Geotextiles
        Type: general
      – SubjectFull: Slope stability
        Type: general
      – SubjectFull: Strength of materials
        Type: general
      – SubjectFull: Hydrophobic surfaces
        Type: general
      – SubjectFull: Coal mine waste
        Type: general
      – SubjectFull: Nanostructured materials
        Type: general
      – SubjectFull: Geotechnical engineering
        Type: general
      – SubjectFull: India
        Type: general
    Titles:
      – TitleFull: Utilization of fly ash nano-composite coated jute geotextile as a reinforcement material in the stabilization of coal mine overburden dump slopes.
        Type: main
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            NameFull: Chakraborty, Tapabrata
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            NameFull: Pal, Supriya
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            NameFull: Mandal, Mrinal Kanti
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            – D: 01
              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
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              Value: 51
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            – TitleFull: Sādhanā: Academy Proceedings in Engineering Sciences
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