Demonstration Project of Safe and Efficient Mining Operations in Extra-thick Coal Seam

Jin-hui Wang

doi:10.15302/J-FEM-2016040

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Front. Eng ›› 2016, Vol. 3 ›› Issue (3) : 264-274. DOI: 10.15302/J-FEM-2016040

ENGINEERING MANAGEMENT REPORTS

Demonstration Project of Safe and Efficient Mining Operations in Extra-thick Coal Seam

Jin-hui Wang

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Abstract

Mineable coal reserves in thick and extra-thick seams account for 44% of the total deposit in China. Fully-mechanized top-coal caving technology is a new mining method of safe and efficient underground operations in extra-thick seams in China. The development of fully-mechanized top-coal caving technology in China, which was successfully applied in Face 8105 in Tashan Coal Mine, Datong, Shanxi, China, is analyzed in this paper. Studies on movement pattern of top-coal and roof from fully-mechanized top caving face in 14–20 m extra-thick seams have been carried out. A series of key technologies were successfully developed, including strata control technology, equipment for high-efficient and high-recovery top caving operations, and safety guarantee technology for low gas occurrence and high gas emission. As a result, the fully-mechanized top-coal caving Face 8105, with large mining height in Tashan Coal Mine, has achieved a recovery rate of 88.9% and an average equipment operation rate of 92.1%. With coal production of 10.84 Mt in 2011, the demonstration project is a technology and equipment breakthrough for fully-mechanized top-coal caving face in extra-thick coal seams with large mining height.

Keywords

demonstration project / extra-thick coal seam / large mining height / fully-mechanized top-coal caving recovery rate / strata control / safety guarantee

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Jin-hui Wang. Demonstration Project of Safe and Efficient Mining Operations in Extra-thick Coal Seam. Front. Eng, 2016, 3(3): 264‒274 https://doi.org/10.15302/J-FEM-2016040

References

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2016 The Author(s) 2016. Published by Higher Education Press. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0)