Community Research and Development Information Service - CORDIS

Abstract

When excavating headings in seams of hard-coal, both the rate of advance and mine safety can be improved through the use of roof-bolts instead of props. In European mines, unlike those elsewhere, roof-bolting is seldom used. The longwall mining method, customary in Europe, produces reactions in the ground mass which are still insufficiently understood. Some 40 km of roof-bolted gate roads and main seam roads, some of them damaged, were investigated in order to develop a schematic method for assessing the stability of a roof-bolted heading according to 18 separate criteria. These correspond to a range of parameters arising from dynamic and static stresses in the strata and dependent on the degree of cohesion between them. The concept involves a step-by-step procedure enabling sections of headings subject to a high level of stress to be identified and targeted for reinforcement of the roof-bolts. By this means it is economically feasible to drive and work a heading with stable roof-bolt support.

Additional information

Authors: REUTHER E-U, Rheinisch-Westfälische Technische Hochschule Aachen, Institut für Bergbaukunde I, Aachen (DE);HEIME A, Rheinisch-Westfälische Technische Hochschule Aachen, Institut für Bergbaukunde I, Aachen (DE)
Bibliographic Reference: EUR 12996 DE (1990) 159 pp., FS, ECU 13.75
Availability: (2)
ISBN: ISBN 92-826-1951-6
Record Number: 199110009 / Last updated on: 1994-12-02
Category: PUBLICATION
Original language: de
Available languages: de
Follow us on: RSS Facebook Twitter YouTube Managed by the EU Publications Office Top