Results 121 to 130 of about 1,698,756 (161)

Application of the Vibration to the Top Coal Caving

Applied Mechanics and Materials, 2011
The article discussed the advantages and disadvantages of the traditional long wall top coal caving (LTCC) first, then proposed a new technique of top coal caving with vibration. The theoretical basis of the technique was elaborated.The top coal vibration system and its control system have been designed as such when the system works, the emulsion pump ...
Xuan Xiang Jian, Yong Jun Yang, Yi Lin
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Caving mechanisms of loose top-coal in longwall top-coal caving mining method

International Journal of Rock Mechanics and Minings Sciences, 2014
Abstract The top-coal caving mining method, developed steadily in the past two decades, has become the main method for thick seam coal mining in China. In recent years, the core research areas in the top-coal caving mining are the mechanisms of top-coal caving and the improvement of top-coal recovery ratio.
Like Wei, Haohao Liu
exaly   +2 more sources

Stress analysis of longwall top coal caving

International Journal of Rock Mechanics and Mining Sciences, 2010
Longwall top coal caving (LTCC) is a relatively new method of mining thick coal seams that is currently achieving high productivity and efficiency in application, particularly in China. The technique is similar to traditional longwall mining in that a cutting head slices coal from the lower section of the coal seam onto a conveyor belt installed in ...
Alehossein, Habib, Poulsen, Brett A.
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Effect of Key Parameters on Top Coal First Caving and Roof First Weighting in Longwall Top Coal Caving: A Case Study

International Journal of Geomechanics, 2020
Abstract The first caving of top coal and the first weighting of roof strata in Longwall Top Coal Caving (LTCC) mining were analyzed in a parametric study by using a discontinuum modeling technique...
Tien Dung Le
exaly   +2 more sources

Flow of top coal and roof rock and loss of top coal in fully mechanized top coal caving mining of extra thick coal seams

Arabian Journal of Geosciences, 2016
This study investigates the flow and caving characteristics of top coal and roof rock, as well as top coal loss pattern in the fully mechanized top coal caving mining of extra thick coal seams. The two dimensional discrete element numerical simulation software program, particle flow code (PFC), is used for the simulation of top coal caving and the ...
Ningbo Zhang, Changyou Liu, Peiju Yang
exaly   +2 more sources

Optimization of the Process Parameters of Fully Mechanized Top-Coal Caving in Thick-Seam Coal Using BP Neural Networks

Sustainability, 2022
The method of fully mechanized top-coal caving mining has become the main method of mining thick-seam coal. The process parameters of fully mechanized caving will affect the recovery rate and gangue content of top coal.
Minfu Liang
exaly   +2 more sources

Investigation of the effect of caving height on the efficiency of the longwall top coal caving production method applied in inclined and thick coal seams by physical modeling

International Journal of Rock Mechanics and Minings Sciences, 2023
© 2022 Elsevier LtdThe longwall top coal caving (LTCC) production method, applied by forming a face in the horizontal thickness of the seam and also called horizontal section top coal caving, especially in studies originating from China, is widely used ...
Arif ÇELİK, Y Özçelik
exaly   +2 more sources

Drawing mechanism of fractured top coal in longwall top coal caving

International Journal of Rock Mechanics and Mining Sciences, 2020
Abstract This work proposed a progressive-sectional failure model (PSFM) based on Particle Flow Code (PFC) to simulate top coal drawing process in longwall top coal caving (LTCC) mining. The progressive-sectional fracturing of top coal was reproduced in simulation.
Zhengyang Song, Heinz Konietzky, Martin Herbst   +2 more
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Modeling Top Coal Disintegration in Thick Seams in Longwall Top Coal Caving

Journal of Mining Science, 2019
The geomechanical model of the powered roof support-top coal-roof rock system is developed. For investigation of disintegration processes in top coal of thick seam, numerical modeling with finite element discretization of a study domain is carried out using the authors’ original code.
V. I. Klishin, V. N. Fryanov, L. D. Pavlova, G. Yu. Opruk   +3 more
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Force chains in top coal caving mining

International Journal of Rock Mechanics and Mining Sciences, 2020
Abstract During the top coal caving mining, rock mass becomes fractured, and the physical status of top coal and overlying strata in the vicinity of the working face changes from continuous to discontinuous medium. It is considerably difficult to explain in theory the transition and action of mining-induced pressure in discrete top coal and fractured
Jin-an Wang, Liu Yang, Fei Li, Chao Wang
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