Title:
METHOD FOR SYNERGISTIC FLUIDIZATION FILLING DISPOSAL OF SOLID MINE WASTE AND CARBON DIOXIDE STORAGE
Document Type and Number:
WIPO Patent Application WO/2024/082838
Kind Code:
A1
Abstract:
Disclosed are a method for synergistic fluidization filling disposal of solid mine waste and carbon dioxide storage and a system based on the method. In the method, a ground carbon sequestration-ground well filling-downhole carbon sequestration system is formed, and a solid mine waste-based filling slurry (12) with a CO2 mineralization storage function is introduced into a goaf which is formed after coal resources are mined, thereby realizing the disposal of solid mine waste and CO2 storage. The method specifically comprises: mixing crushed coal gangue with an additive, conveying the mixture to a stirring carbon sequestration reaction device (7), adding water thereto and stirring same, injecting CO2 gas into same from the bottom, and stopping injecting CO2 after the flowing performance of the slurry reaches the minimum limit required by pumping; conveying the filling slurry to a downhole goaf (11) by means of a filling pump (9) via a filling pipeline (10); and after the downhole goaf is filled with the filling slurry, injecting CO2 into the downhole slurry via a gas pipeline (13) until the slurry is solidified. The method is safe, efficient and feasible, has low costs, achieves green mining of coal resources and CO2 storage in a downhole space, and reduces the damage of coal mining to the ecological environment.
Inventors:
LI BAIYI (CN)
LONG KANG (CN)
GUO YUMING (CN)
ZHANG JIXIONG (CN)
MA JIAYUAN (CN)
ZHOU NAN (CN)
LONG KANG (CN)
GUO YUMING (CN)
ZHANG JIXIONG (CN)
MA JIAYUAN (CN)
ZHOU NAN (CN)
Application Number:
PCT/CN2023/116687
Publication Date:
April 25, 2024
Filing Date:
September 04, 2023
Export Citation:
Assignee:
CHINA UNIV OF MINING AND TECHNOLOGY (CN)
International Classes:
E21F15/06; B01D53/62; B01D53/80; E21F15/00
Attorney, Agent or Firm:
NANJING JINGWEI PATENT & TRADEMARK AGENCY CO., LTD (CN)
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