Community Research and Development Information Service - CORDIS

Abstract

Efficient and safe mining of hardcoal is made possible by using percussion- and vibration- activated hydraulic cutting tools. Their sturdy design largely precludes any externally induced malfunctions. Cutting forces are considerably reduced in comparison with static tools. The extracted material is of lump size and low moisture content and, as such, promises good sales profits as high-grade coal. Extremely little dust is produced during extraction. It is still premature to assess finally the application potentials of different activated cutting tools either of the hydraulic/translatory or of the mechanical/rotary type. The above fundamental studies have to be followed by other long-term tests also underground. As for activated loading machines, any final assessment cannot be given as yet although the surface and underground trial runs on rotative disk loaders have been encouraging. Remarkable loading efficiencies were attained with, at the same time, low defect susceptibility. It remains to be demonstrated by continued tests whether the high technical expenditure for reducing the tensile forces of chains is justifiable.

Additional information

Authors: PLUM H, Bergbau-Forschung GmbH, Franz-Fischer-Weg 61, D-4300 Essen 13, Kray (DE);VITEK H, Bergbau-Forschung GmbH, Franz-Fischer-Weg 61, D-4300 Essen 13, Kray (DE);WOLTER H, Bergbau-Forschung GmbH, Franz-Fischer-Weg 61, D-4300 Essen 13, Kray (DE)
Bibliographic Reference: EUR 12075 DE (1989) MF, 104 pp., ECU 8, blow-up copy ECU 13.75
Availability: (2)
Record Number: 198911075 / Last updated on: 1994-12-01
Category: PUBLICATION
Original language: de
Available languages: de