Method of filling abandoned mineshaft and concurrently mineralizing and sequestering co2 using solid waste slurries

The method uses solid waste-based slurries to form a stable, enclosed structure in mineshafts, effectively sequestering CO2 and preventing leakage, while addressing structural issues and pollution.

US20260160165A1Pending Publication Date: 2026-06-11SHANXI UNIV
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
SHANXI UNIV
Filing Date
2025-04-16
Publication Date
2026-06-11

AI Technical Summary

⚠Technical Problem

Existing methods for sequestering CO2 in abandoned mineshafts face challenges such as gas leakage, incomplete mineralization, and environmental pollution, failing to provide a stable and enclosed space for CO2 sequestration and addressing issues like surrounding rock collapse and foundation subsidence.

⚗Method used

A method involving the use of solid waste-based slurries to form a plugging layer, porous stone body, and closed protective shell in abandoned mineshafts, utilizing CO2 foam slurry to mineralize and sequester CO2 within the structure, ensuring no leakage and complete sequestration.

🎯Benefits of technology

Stably sequesters CO2, prevents atmospheric emission, and addresses environmental pollution and structural instability in mineshafts, enhancing structural integrity and safety.

✦ Generated by Eureka AI based on patent content.

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Abstract

Provided is a method of filling an abandoned mineshaft and concurrently mineralizing and sequestering CO2 using solid waste slurries. The method includes: S1, pouring and spraying a solid waste-based plugging slurry to inner walls and a bottom of the abandoned mineshaft, and curing to form a plugging layer; S2, grouting a solid waste-based CO2 foam slurry into the abandoned mineshaft, and curing to form a porous stone body with CO2-filled pores, wherein the porous stone body with CO2-filled pores; and S3, grouting a solid waste-based micro-expansion slurry into a top portion of the abandoned mineshaft, and curing to form a closed protective shell.
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