| 摘要 |
A method of strip mining coal or other minerals by way of continuous-operation winning equipment with a cylindrical winning tool that excavates strips with a more or less rectangular section. The rectangle is approximately as wide as the tool and no higher than half the tool's diameter as the equipment advances. The equipment is connected by a system of conveyor belts to a loader that deposits the excavated minerals onto a face conveyor. The face conveyor can be shifted more or less parallel to the direction the equipment moves in. A quadrilateral district is exposed as the equipment travels first along one short side, then along one long side, and finally along the other short side. Its tool lifts out a strip of mineral. The equipment turns at each end along an arc of approximately one eighth to one fourth of a circle to end up in a ramp surface that occurs when the tool is lowered and raised. A terraced wall is created by lifting out many strips as the equipment's travel is shifted to the side. The ramps of the various strips combine into one ramp surface with a slope that allows the equipment to travel over it under its own power. Once the wall has been created, the blocks of mineral in the district, which comprise several levels one above another and one adjacent to another, are mined in succession starting with the floor created along with the wall. Each level comprises an equal number of adjacent strips.
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