Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
METHOD FOR WATER CONSERVATION MINING BY FILLING FLEXIBLE STRIP
Abstract The present invention discloses a method for water conservation mining by filling a flexible strip, including the following steps: discrimination of a special water conservation mining area: through the analysis and calculation of conditions of coal seam occurrence, determining whether a mining area belongs to a special water conservation mining area; preparation of a flexible backfilling material: a paste backfilling material including, by mass percentage, 70% of aeolian sand, 6% of cement, 7.7% of fly ash, 0.3% of additive and 16% of water, where a flexible backfilling strip allows a compression ratio of 7-10%; pumping of the backfilling material: sequentially conveying the paste backfilling material prepared on the ground to a drilling pipe, a mining area where a filling working face is located, and a working face filling point through a pumping system; determining of a gap backfilling ratio and an aspect ratio parameter of the backfilling strip: determining the gap backfilling ratio according to stability conditions of an aquiclude, and determining the aspect ratio parameter of the backfilling strip according to medium and long-term stability conditions of the backfilling strip. The present invention has small filling amount and low cost, and has the advantages of high recovery rate and no threat of wide-range roof caving. Aeolian sand Cement Additive Fly ash Water bulk vehicle bulk vehicle bulk vehicle bulk vehicle Cylindrical barn Cylindrical barn Pool Cylindrical barn Cylindrical barn Feeder Feeder Water pump Water pump Feeder Feeder Weighing hopper Weighing hopper Wegig hopper Weighing hopper Weighing hopper] Weighing hopper Mixer Mixer Slrybucket Filling pump Filling pump Groundpipe Drilling pipe Downhole pipe Working face pipe Three-way pipevalve Backfilling point
METHOD FOR WATER CONSERVATION MINING BY FILLING FLEXIBLE STRIP
Abstract The present invention discloses a method for water conservation mining by filling a flexible strip, including the following steps: discrimination of a special water conservation mining area: through the analysis and calculation of conditions of coal seam occurrence, determining whether a mining area belongs to a special water conservation mining area; preparation of a flexible backfilling material: a paste backfilling material including, by mass percentage, 70% of aeolian sand, 6% of cement, 7.7% of fly ash, 0.3% of additive and 16% of water, where a flexible backfilling strip allows a compression ratio of 7-10%; pumping of the backfilling material: sequentially conveying the paste backfilling material prepared on the ground to a drilling pipe, a mining area where a filling working face is located, and a working face filling point through a pumping system; determining of a gap backfilling ratio and an aspect ratio parameter of the backfilling strip: determining the gap backfilling ratio according to stability conditions of an aquiclude, and determining the aspect ratio parameter of the backfilling strip according to medium and long-term stability conditions of the backfilling strip. The present invention has small filling amount and low cost, and has the advantages of high recovery rate and no threat of wide-range roof caving. Aeolian sand Cement Additive Fly ash Water bulk vehicle bulk vehicle bulk vehicle bulk vehicle Cylindrical barn Cylindrical barn Pool Cylindrical barn Cylindrical barn Feeder Feeder Water pump Water pump Feeder Feeder Weighing hopper Weighing hopper Wegig hopper Weighing hopper Weighing hopper] Weighing hopper Mixer Mixer Slrybucket Filling pump Filling pump Groundpipe Drilling pipe Downhole pipe Working face pipe Three-way pipevalve Backfilling point
METHOD FOR WATER CONSERVATION MINING BY FILLING FLEXIBLE STRIP
HUANG QINGXIANG (Autor:in) / CHEN JIE (Autor:in)
26.03.2020
Patent
Elektronische Ressource
Englisch
IPC:
E21F
Sicherheitsvorrichtungen, Förderung, Auffüllen oder Bergversatz, Rettungswesen, Bewetterung oder Entwässerung in oder von Gruben oder Tunnels
,
SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINAGE IN OR OF MINES OR TUNNELS
/
C04B
Kalk
,
LIME
/
E21C
Bergbau oder Steinbruchbetrieb
,
MINING OR QUARRYING
| Europäisches Patentamt | 2023