Community Research and Development Information Service - CORDIS


The pneumatic filling technology is generally used in dense deposits, in mining areas that are sensitive to subsidence or in order to limit coal tips. The hydraulic prop was improved several years ago and has already been associated with pneumatic packing, the backfilling running behind on the watertight shields. The hydraulic prop for caving wall mining is the only one to be suited to the slope. The research into solutions for the pneumatic filling is naturally based on this technology. Tests worked out in an experimental station have shown that it was possible to run out of the schist under gravity or to pump a sand and cement mix. This technology, which is more expensive than pneumatic filling, requires an adjustment of the roof support. The basic measurements of mechanical parameters, carried out at a pneumatic filling work-face, have been used to create a mathematical model of the roof behaviour. This model, which was used for the characterisation of the new timber, can be extended for use in caving wall mining.

Additional information

Authors: CERCHAR, Cerchar, Tour Albert 1er, 6 avenue de Colmar, F-92507 Rueil-Malmaison (FR)
Bibliographic Reference: EUR 12072 FR (1989) MF, 66 pp., ECU 4, blow-up copy ECU 8.75
Availability: (2)
ISBN: CD-NA-12072-FR-C
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