Longwall shearers cut away the face of a coal seam in longwall mining operations by mounting over an armored face conveyor (AFC). They are equipped with cutting drums positioned against the coal seam ...

As longwall mining becomes an increasing concern near Cameron, the city clerk is preparing residents for what may come.“I ...

Plow systems extract segments of coal across the face of a coal seam during longwall mining procedures. They are used in lieu of a shearer on coal seam thickness less than 1.8 meters in height, and ...