Abstract
The effective production of high-quality anthracite has attracted increasing global attention. Based on the coal occurrence in Yongxia Mining Area and mining conditions of a coalface in Xinqiao Coal Mine, we proposed a systematic study on the technical support for the production of high-quality anthracite. Six key steps were explored, including coal falling at the coalface, transport, underground bunker storage, main shaft hoisting, coal preparation on the ground, and railway wagon loading. The study resulted in optimized running parameters for the shearers, and the rotating patterns of the shearer drums was altered (one-way cutting was employed). Mining height and roof supporting intensity were reduced. Besides, loose presplitting millisecond blasting and mechanized mining were applied to upgrade the coal quantity and the lump coal production rate. Additionally, the coalface end transloading, coalface crush, transport systems, underground storage, and main shaft skip unloading processes were improved, and fragmentation-prevention techniques were used in the washing and railway wagon loading processes. As a result, the lump coal production rate was maintained at a high level and fragmentation was significantly reduced. Because of using the parameters and techniques determined in this research, high-quality coal production and increased profits were achieved. The research results could provide theoretical guidance and methodology for other anthracite production bases.
Highlights
IntroductionAs one of six approved domestic anthracite production bases, Yongxia Mining Area (YMA)
As one of six approved domestic anthracite production bases, Yongxia Mining Area (YMA)of Henan Province in China has an intended capacity of 10 million tons yearly
Mine (XCM), we the technical supports for the production of high-quality anthracite in this paper
Summary
As one of six approved domestic anthracite production bases, Yongxia Mining Area (YMA). Mine (XCM), we the technical supports for the production of high-quality anthracite in this paper (the remaining proposed a systematic study on the technical supports for the production of high-quality anthracite sections includes mine conditions and mining techniques, techniques for increased LCPR of raw coal, in this paper (the remaining sections includes mine conditions and mining techniques, techniques fragmentation-prevention techniques for lump coal, and economic benefits). It should be pointed out for increased LCPR of raw coal, fragmentation-prevention techniques for lump coal, and economic that the proposed coal mining methods are only used for underground mining The results of this study have been widely adopted for high-quality anthracite production in other coal mines, YMA
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