Determination of the most effective longwall equipment combination in longwall top coal caving (LTCC) method by simulation modelling

Şimşir, Ferhan; Özfırat, M. Kemal

doi:10.1016/j.ijrmms.2007.11.005

Cited by 38 publications

(19 citation statements)

References 4 publications

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“…Production of thick seams using top coal caving is much simpler in comparison to slice mining and requires less development, consequently, the efficiency of production is significantly higher. For thick seams, multi-slice longwall mining is less convenient, less costeffective, and requires more labor than longwall top coal caving (LTCC) methods (Xie et al, 1999;Yasitli and Unver, 2005;Unver and Yasitli, 2006;Simsir and Ozfirat, 2008).…”

Section: Mining Methodsmentioning

confidence: 99%

Finite element modeling of stress distributions and problems for multi-slice longwall mining in Bangladesh, with special reference to the Barapukuria coal mine

Islam

Hayashi

Kamruzzaman³

2009

International Journal of Coal Geology

139

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Section: Mining Methodsmentioning

confidence: 99%

Finite element modeling of stress distributions and problems for multi-slice longwall mining in Bangladesh, with special reference to the Barapukuria coal mine

Islam

Hayashi

Kamruzzaman³

2009

International Journal of Coal Geology

139

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“…Of particular interest is the identification of bottlenecks in the system and the impact of adding a surge bin to diminish the negative impact of bottlenecks. Simsir and Ozfirat () use a simulation model to assess the efficiency of loaders, crushers and conveyor belts, inter alia, and the number of cuts in a coal seam.…”

Section: Miningmentioning

confidence: 99%

Operations research in the natural resource industry

Bjørndal

Herrero

Newman

et al. 2011

Int Trans Operational Res

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Operations research is becoming increasingly prevalent in the natural resource sector, specifically in agriculture, fisheries, forestry and mining. While there are similar research questions in these areas, e. g., how to harvest and/or extract the resources and how to account for environmental impacts, there are also differences, e.g., the length of time associated with a growth and harvesting or extraction cycle, and whether or not the resource is renewable. Research in all four areas is at different levels of advancement in terms of the methodology currently developed and the acceptance of implementable plans and policies. In this paper, we review the most recent and seminal work in all four areas, considering modeling, algorithmic developments and application.Technical University of Madrid Autonomous Government of Madrid Q090705-1

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“…Among the measured coal reserves in China, thick and extra-thick coal seams account for about 45% [3,4]. With the application and promotion of large mining height and top coal caving technology, thick and extra-thick coal seam become the main mined seam due to its high yield and efficiency [5,6]. Compared with traditional coal mining methods, large mining height and top coal caving methods have higher requirements for the sections of the underground strap joint chamber and washing chamber, etc.…”

Section: Introductionmentioning

confidence: 99%

Dome Roof Fall Geohazards of Full-Seam Chamber with Ultra-Large Section in Coal Mine

et al. 2019

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Featured Application: In this study, the mechanism of roof fall of full-seam ultra-large section chamber was uncovered and the corresponding control technology was put forward and successfully applied. The study provide a successful case of roof fall control in a special condition, and has a guiding and reference significance for ultra-large section chamber control during extra-thick coal seam mining, which is beneficial to ensure the production efficiency of coal mine. Abstract:The roof fall hazard is more likely to take place within chamber with ultra-large section, which would not only damage mechanical equipment, but also cause casualties. In this paper, the strap joint chamber of the Tashan coal mine is studied, and finite and discrete element method (FDEM) is used to establish the numerical model of the roof fall of the chamber dome. The simulation results show that the chamber dome mainly undergoes shear failure and forms a large number of cracks. With further development and penetration of cracks, a distinct roof separation is found in the chamber dome. When the crack develops to the dome surface of the chamber, under the effect of the mine pressure, the coal body is separated from the surface of the chamber and the roof fall hazard occurs. Based on the mechanism of roof fall hazard of the chamber dome, it is concluded that improving the shear strength of the surrounding rock and reducing the crack penetration are the main ways to control the roof fall. Therefore, the high-strength anchor bolt and cable support is adopted to fill the cracks and improve the shear strength of the surrounding rock. The result showed that the roof separation of the chamber dome in the field is confined to 0.012 m. The surrounding rock is well controlled and no roof fall occurs.

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Determination of the most effective longwall equipment combination in longwall top coal caving (LTCC) method by simulation modelling

Cited by 38 publications

References 4 publications

Finite element modeling of stress distributions and problems for multi-slice longwall mining in Bangladesh, with special reference to the Barapukuria coal mine

Finite element modeling of stress distributions and problems for multi-slice longwall mining in Bangladesh, with special reference to the Barapukuria coal mine

Operations research in the natural resource industry

Dome Roof Fall Geohazards of Full-Seam Chamber with Ultra-Large Section in Coal Mine

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