support for mining of coal seams with face reverse fault, preferably automatically operated

摘要

969,902. Mine roof supports for inclined seams. GEWERKSCHAFT EISENHUTTE WESTFALIA. March 17, 1961 [March 24, 1960], No. 9878/61. Heading E1E. A mine roof support for use in steep measures comprises a telescopic roof bar 22, 23 which has a locking device 24 and is mounted on a relatively sliding hydraulic prop 14, 15 and stowing wall unit 16 - - 21. A series of such supports are arranged in parallel relationship for alternate advancement being suitably interconnected by a flat rope 27 and tension chains 25, 26. Specification 844,391 is referred to.