Behavior of Apparent Chloride Diffusion Coefficient of Fly Ash Concrete Under Long-Term Marine Exposure

Yoon, Yong-Sik; Kwon, Seung-Jun

doi:10.2139/ssrn.4051149

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…According to the practical experience of our research group, the following measures can be taken in order to improve the activity and purity of the filling materials in the preparation process [43][44][45].…”

Section: Performance-optimization Methods Of Coal-gangue Materialsmentioning

confidence: 99%

Study on the Mining Effect and Optimal Design of Longwall Full Mining with Paste Partial Filling

Zhou,

Wang,

Liao

et al. 2024

Minerals

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Various methods of longwall full mining with partial filling have been extensively researched to satisfy the specific mining needs of pressurized-coal and residual-coal resources. This study introduces three longwall partial-filling-mining techniques: room–pillar filling mining, parallel-strip filling mining, and vertical-strip filling mining. Numerical simulations are employed to evaluate the efficacy of these methods. The findings indicate that vertical-strip filling mining results in minimal surface deformation and a more uniform distribution of displacements. In practical operations, the effectiveness of filling largely depends on the choice of filling technology and materials. The research further includes an optimization analysis of the filling technology, emphasizing the composition of the coal-gangue-paste filling system and the refinement of its components. Additionally, the study aims to explore the optimization analysis of filling materials, specifically focusing on performance-optimization methods. The experimental results illustrate that optimizing the filling materials can enhance the performance of filling paste, improving both early-stage and long-term compressive strength. Moreover, the paper examines the quantitative characterization of paste-filling-mining subsidence at various stages in conjunction with theoretical knowledge. Subsequently, mining-subsidence-control measures are recommended to address the primary deformation factors across different stages. Through an in-depth examination of filling-method designs, enhancements in filling technology, and predictions regarding filling-mining subsidence, this research offers valuable insights for optimizing longwall partial-filling-mining methods.

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Section: Performance-optimization Methods Of Coal-gangue Materialsmentioning

confidence: 99%

Study on the Mining Effect and Optimal Design of Longwall Full Mining with Paste Partial Filling

Zhou,

Wang,

Liao

et al. 2024

Minerals

View full text Add to dashboard Cite

show abstract

Section: Performance Optimization Methods Of Coal Gangue Materialsmentioning

confidence: 99%

Different methods of longwall full mining partial filling and optimal design of filling process

Wang

Lü

et al. 2023

Preprint

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Different methods of longwall full mining partial filling have been extensively studied to meet the special mining requirements of pressure coal resources and residual coal resources. The research aims to reduce production costs, ensure safe and efficient production of filling mining. Three longwall partial filling mining technologies are proposed: room-pillar filling mining, parallel strip filling mining, and vertical strip filling mining. Numerical simulation and the Analytic Hierarchy Process (AHP) model are utilized to analyze the effects of these methods. The results demonstrate that vertical strip filling mining exhibits the smallest surface deformation and the most regular displacement distribution. Additionally, an AHP model is employed to determine the index weights for safety, economic factors, stress, displacement, and filling cost. A hierarchical structure is established with safety and economic mining as the target layer, and stress, displacement, and economic factors as the criterion layer. The vertical strip filling mining method was calculated as the comprehensive optimal scheme. In practical operations, the filling technology and filling material performance play crucial roles in determining the filling effect. The study includes the optimization analysis of the filling technology, focusing on the composition of the coal gangue paste filling system and the optimization of the system components. Additionally, the study investigates the optimization analysis of filling materials, particularly the performance optimization methods. Experimental results demonstrate that optimizing the filling materials can improve the performance of the filling paste, enhancing both early-stage and long-term compressive strength. This research can provide valuable insights into the optimal design of longwall partial filling mining methods.

show abstract

Sustainable longwall partial filling mining strategies and optimal design of paste filling process

Zhou,

Wang,

Liao

et al. 2024

Preprint

View full text Add to dashboard Cite

Different methods of longwall full mining partial filling have been extensively studied to meet the special mining requirements of pressure coal resources and residual coal resources. The research aims to reduce production costs, ensure safe and efficient production of filling mining. Three longwall partial filling mining technologies are proposed: room-pillar filling mining, parallel strip filling mining, and vertical strip filling mining. Numerical simulation and the Analytic Hierarchy Process (AHP) model are utilized to analyze the effects of these methods. The results demonstrate that vertical strip filling mining exhibits the smallest surface deformation and the most regular displacement distribution. Additionally, an AHP model is employed to determine the index weights for safety, economic factors, stress, displacement, and filling cost. A hierarchical structure is established with safety and economic mining as the target layer, and stress, displacement, and economic factors as the criterion layer. The vertical strip filling mining method was calculated as the 1comprehensive optimal scheme. In practical operations, the filling technology and filling material performance play crucial roles in determining the filling effect. The study includes the optimization analysis of the filling technology, focusing on the composition of the coal gangue paste filling system and the optimization of the system components. Additionally, the study investigates the optimization analysis of filling materials, particularly the performance optimization methods. Experimental results demonstrate that optimizing the filling materials can improve the performance of the filling paste, enhancing both early-stage and long-term compressive strength. This research can provide valuable insights into the optimal design of longwall partial filling mining methods.

show abstract

Behavior of Apparent Chloride Diffusion Coefficient of Fly Ash Concrete Under Long-Term Marine Exposure

Cited by 3 publications

References 13 publications

Study on the Mining Effect and Optimal Design of Longwall Full Mining with Paste Partial Filling

Study on the Mining Effect and Optimal Design of Longwall Full Mining with Paste Partial Filling

Different methods of longwall full mining partial filling and optimal design of filling process

Sustainable longwall partial filling mining strategies and optimal design of paste filling process

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