Blind Pneumatic Stowing in Voids in Abandoned Mines

摘要

The report reviews the state of the art in blind pneumatic stowing of backfill in voids in abandoned coal mines. It contains a short history of the development of pneumatic equipment in mining and four recent case histories where blind pneumatic stowing was used. Limitations of pneumatic stowing in terms of equipment wear, costs, backfill material, and methodology are discussed, and some new procedures and designs are reviewed. A bibliography covering pneumatics in mining is provided also. This report provides background for the preparation of a Bureau of Mines test program where the variables affecting the efficiency of pneumatic backfilling will be studied using a full-scale surface test facility.