Method of, and apparatus for, winning mineral material
AssigneeGewerkschaft Eisenhutte Westfalia
InventorsHelmut Langenberg, Hans-Theodor Grisebach, Heinz Weinhold
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Abstract
The specification discloses a method of, and apparatus for, winning mineral material from the pillars left by the bord-and-pillar mining process. An arcuate longwall face, which may be convex or concave, is formed along a row of pillars. The mineral material in the pillars is won by mechanical winning means such as a plough, the pillars in each row being won in a non-uniform manner. Some of the mineral material won from the longwall face may be used to fill the stalls left between the pillars behind the longwall face.
Claims22
A method of winning mineral material from pillars left between laterally spaced roadways or galleries by the bord-and-pillar mining process, the method comprising the steps of forming an arcuate longwall face which extends between the roadways across a plurality of pillars, and of winning mineral material in a non-uniform manner from said pillars using mechanical winning means.
Apparatus for winning mineral material from pillars left between laterally spaced roadways or galleries by the bord-and-pillar mining process, the apparatus comprising an arcuate longwall conveyor extending between the roadways across a plurality of pillars, mechanical winning means for winning mineral material in a non-uniform manner from said pillars, and a roof support assembly for supporting the roof of the working.
Dependencies are inferred from the claim text.