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Journal of Material Sciences
ISSN: 2321-6212
I n t e r n a t i o n a l C o n f e r e n c e o n
Metal, Mining and
Magnetic Materials
N o v e m b e r 0 1 - 0 2 , 2 0 1 8
P a r i s , F r a n c e
Metal and Magnetism 2018
The study of Longwall Top Coal Caving method at Thar Coal,
Pakistan
Niaz Muhammad Shahani
1
, Zhijun Wan
1
, Guichen Li
1
,
Bi Shike
1
and Abdul Ghani Pathan
2
1
China University of Mining and Technology, China
2
Mehran University of Engineering and Technology, Pakistan
R
esearch studies have shown that there is an extensive quantity of lignite coal reserves in the form of thick coal seams at Thar
Coal, Pakistan. The Top Coal Caving methodology is the most efficient and effective for the extraction of these thick coal
seams. The Longwall Top Coal Caving (LTCC) is an underground mining method that is gradually developed and accepted in the
recent years. This method has turn into the key method for thick coal seams and getting better results in China. However, recent
attention by many researchers has resulted in improvement of this LTCC method in different corners of the world. In this research
study, 6 m thick coal seam is modelled successfully and the mechanism of top coal and top coal recovery ratio demonstrated
by the numerical simulation with the help of UDEC2D and PFC2D software at Block-9 Thar Coal. In the simulation results, the
maximum vertical abutment stress was found at a distance of 3 m in front of face. A comprehensive study of the existence of
top coal has shown that a 3 m thick layer of coal just above the shield can be easily caved behind the face. At the cutting-caving
height ration of 1:1 and drawing interval of 0.8 m 84.9% of top coal recovery ratio is successfully achieved. Thar Coal is the first
coal mine that will use LTCC method in Pakistan. Hence, this research conclusion can provide useful information in the future
production at Thar Coal.
shahani.niaz@gmail.comJ Mat. Sci. 2018, Volume:6
DOI: 10.4172/2321-6212-C7-033