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Coal Cutting Technology of Double Drum Shearer
Release time:
2022-12-23
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1. Coal cutting method
(1) Two-way coal cutting. Under normal circumstances, double drumShearer is a two-way coal cutting along the working face, the front drumCut the top coal, and the rear drum cuts the bottom coal.With the cutting of the shearer, the coal is blocked in the spiral drum and arc.Under the action of the plate, most of the coal is loaded onto the conveyor,The remaining coal is loaded by the shovel plate when the conveyor is moved. Under special conditions, the front drum can also be used to cut the bottom coal,The rear drum cuts the top coal. For example, in the upper part of the coal seam with a layer of hard stone, the front roller first cut the bottom coal,The coal at the bottom of the sandwich layer is hollowed out, the resistance of the rear drum when cutting the top coal is greatly reduced, and the consumption of the pick is significantly reduced,The operation of the shearer is also stable. However, the coal cut by the rear drum falls more on the bottom plate, and the coal loading efficiency of the shearerLow rate.
(2) One-way coal cutting. One-way coal cutting generally refers to the coal mining machine along the face of the downward cutting coal, upward running empty knife,A way of cutting coal back and forth. This method is suitable for coal seams with large inclination and hard coal quality. dip angle of coal seamWhen the coal is large, if the coal is cut up, the shearer is easy to slip and the traction speed is slow; especially when the coal is hard,Large lumps of coal cut by the front drum are easy to jam the shearer, and unidirectional coal cutting is generally used.
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