RECIPROCAL EXTRACTOR-FEEDER FOR THE EXTRACTION POINTS IN CAVING MINING

摘要

The invention relates to extractor/feeder equipment to be installed at the extraction points, in methods of underground exploitation by: block/panel caving, sub-levels and others. It consists of two platforms mounted on a chassis with wheels, the rear platform being partially mounted on the front platform. The broken mineral is placed on said platforms. The equipment is actuated in a back-and-forth movement by means of hydraulic cylinders. First, both platforms advance to the transport gallery (GT), extracting a portion of mineral; the front platform then moves back, sliding beneath the rear platform which remains static; the front platform then advances alone with another portion of mineral; and the cycle is finished with both platforms moving back, once more feeding the conveyor. When the platforms advance, the volume extracted/transported is replaced by the overlying volume, first over the rear platform, then over the front platform; as they move back, they feed the conveyor arranged in the GT so that the extracted volumes are filled.