Development of new systems for accurate profiling in roadway heading II
Accurate roadway profile cutting is essential for cost-effective and safe road-heading. Expensive backfilling work may affect heading performance and increase the risk of injury. A logical consequence is the development of machinery which allows the proportion of backfilling work within the whole roadway heading system to be kept to a minimum. One approach is to cut a slot exactly to profile, with simultaneous removal of the roadway core from the strata. Two ways of cutting exactly to profile were tested: a slot cut exactly to profile by high-pressure water jets with abrasive additives, and a slot cut by a cutting head equipped with polycrystalline diamond (PCD) picks. The influence of various rock parameters on the cutting performance were investigated using high-pressure water with added abrasive matter. The results of these tests show that high-pressure water cutting technology is only suited to very special applications, due to the high costs involved. For more widespread use, PCD cutting heads seem more suitable.
Bibliographic Reference: EUR 14031 DE (1992) 49 pp., MF, ECU 4, blow-up copy ECU 7.50
Record Number: 199210589 / Last updated on: 1994-12-02
Original language: de
Available languages: de