Arrangement for the introduction of mountains offset in particular in the coal mining

摘要

1323043 Mines &c COAL INDUSTRY (PATENTS) Ltd 22 Dec 1971 [8 Jan 1971] 1053/71 Heading E1F A packer comprises a guideway 9 held against a mine roof by roof supports (not shown) on the side of the guideway remote from the pack 6, a blade 22 pivoted about a vertical axis and reciprocable along the guideway, a stop 24 fixed relative to the guideway and cooperating with the blade to pivot the blade towards an operative position normal to the guideway at the end of the blades travel away from the pack. The blade is mounted on a slide 14 reciprocated by a chain 10. During operative movement of the blade material 26 removed while forming roadway 4 is moved from a table 2 into a space 8 for extension of the pack.