摘要:
A coal plough has an elongate plough body which is provided with cutters at each end. The plough body is supported at each of its two ends, by a flat narrow skid on a plate of a plough guide. The skids constitute wear-resistant members and are connected to the plough body in a readily replaceable manner. The skids are so shaped that they guide the plough in the lower zone of the plough guide, and establish connection between the plough and the plough drive chain.
摘要:
A cutter bit assembly comprises a holder and a cutter bit. The holder is formed with a pocket into which the cutter bit can be inserted. The cutter bit is retained within the pocket by means of an arcuate wedge inserted into a tapered gap formed between respective curved support faces formed on the cutter bit and the holder.
摘要:
A mineral mining plough has a plough body provided with a carrier supporting roof-level cutters. The carrier is movable vertically with respect to the plough body so as to adjust the cutting level of the roof-level cutters. A worm mounted on the plough body and a toothed rack attached to the carrier constitute means for adjusting the vertical position of the carrier, the worm meshing with the toothed rack.
摘要:
A method of winning material in a mineral mining working utilizes a mineral mining plough which is movable to and fro alongside a conveyor. The plough is provided with first cutter means arranged to win material lying in a first height range, and second cutter means arranged to win material lying in a second height range. The plough is driven on the downhill run with the cutter means so positioned that material is won to a greater depth over the first height range than over the second height range. The plough is then driven on the uphill run with the cutter means so positioned that material is won to a smaller depth over the first height range than over the second height range.
摘要:
An apparatus for winning material in a mineral mining working utilizes a mineral mining plough which is movable to and fro alongside a conveyor. The plough is provided with first cutter means arranged to win material lying in a first height range, and second cutter means arranged to win material lying in a second height range. The plough is driven on the downhill run with the cutter means so positioned that material is won to a greater depth over the first height range than over the second height range. The plough is then driven on the uphill run with the cutter means so positioned that material is won to a smaller depth over the first height range than over the second height range.