Process for introducing pneumatic packing with the addition of fine-grain fillers, and apparatus for carrying out the process

摘要

In particular in underground coalmining, the cavities are packed with prescreened tailings via a pneumatic-packing machine, the pneumatic-packing material supplied to the pneumatic-packing machine being blown into the cavity via a pneumatic packing pipe. In order to improve the packing, packing material, in the pneumatic packing pipe, has added to it in a metered manner a suspension which is stable with respect to sedimentation and is produced from water and extremely fine-grain to fine-grain fillers. <IMAGE>