Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Flexible strip-filled water-protection mining method
The invention discloses a flexible strip-filled water-protection mining method, which comprises the following steps of discriminating a special water-protection mining area: discriminating whether a mining area belongs to the special water-protection mining area or not through the analysis and the calculation of an occurrence condition of a coal bed; preparing a flexible filling material, wherein a paste filling material comprises the following components in percentages by mass: 70% of aeolian sand, 7% of cement, 7% of pulverized fuel ash, 1% of additive and 15% of water, and a flexible filling strip tolerates a 7% to 10% of compression ratio; pumping the filling material: conveying the paste filling material which is prepared on the ground to a hole drilling pipe, a mining area where a filling working surface is located, and a filling point of a working surface through a pumping system; determining parameters of the ratio of a filling interval width to the width of the filling strip and the aspect ratio of the filling strip: determining the ratio of the filling interval width to the width of the filling strip according to the stable condition of a water-resisting layer, and determining the aspect ratio of the filling strip according to a medium-and-long-term stable condition of the filling strip. The flexible strip-filled water-protection mining method is small in filling amount and low in cost, and has the advantages of high recovery ratio and no large-range roof caving threats.
Flexible strip-filled water-protection mining method
The invention discloses a flexible strip-filled water-protection mining method, which comprises the following steps of discriminating a special water-protection mining area: discriminating whether a mining area belongs to the special water-protection mining area or not through the analysis and the calculation of an occurrence condition of a coal bed; preparing a flexible filling material, wherein a paste filling material comprises the following components in percentages by mass: 70% of aeolian sand, 7% of cement, 7% of pulverized fuel ash, 1% of additive and 15% of water, and a flexible filling strip tolerates a 7% to 10% of compression ratio; pumping the filling material: conveying the paste filling material which is prepared on the ground to a hole drilling pipe, a mining area where a filling working surface is located, and a filling point of a working surface through a pumping system; determining parameters of the ratio of a filling interval width to the width of the filling strip and the aspect ratio of the filling strip: determining the ratio of the filling interval width to the width of the filling strip according to the stable condition of a water-resisting layer, and determining the aspect ratio of the filling strip according to a medium-and-long-term stable condition of the filling strip. The flexible strip-filled water-protection mining method is small in filling amount and low in cost, and has the advantages of high recovery ratio and no large-range roof caving threats.
Flexible strip-filled water-protection mining method
HUANG QINGXIANG (Autor:in) / CHEN JIE (Autor:in) / DONG BO (Autor:in)
23.09.2015
Patent
Elektronische Ressource
Englisch
IPC:
E21C
Bergbau oder Steinbruchbetrieb
,
MINING OR QUARRYING
/
C04B
Kalk
,
LIME
/
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
METHOD FOR WATER CONSERVATION MINING BY FILLING FLEXIBLE STRIP
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Effects of Coal Strip Mining upon Water Supplies
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