Inclined layered solid-filling mining method in ultrathick coal layer
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United States of America Patent
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Nov 15, 2016
Grant Date -
Apr 14, 2016
app pub date -
Jan 22, 2014
filing date -
May 20, 2013
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Abstract
In an inclined layered solid-filling mining method in an ultrathick coal layer, tunnels and equipment are arranged according to a solid-filling mining method. An artificial roof for a lower layer is formed by metal meshes and bamboo fences of a first layer a solid-filling mining method. The method is repeated, until the entire ultrathick coal layer is finished. The method is repeated forming additional roofs for subsequent layers.
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