基于碳封存条带充填采空区内低温二氧化碳置换效果的多场耦合数值模拟

宋永泽; 张志义; 刘昊; 苏慧

doi:10.13568/j.cnki.651094.651316.2023.06.12.0001

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基于碳封存条带充填采空区内低温二氧化碳置换效果的多场耦合数值模拟

工程技术 | 更新时间：2026-01-21

- 基于碳封存条带充填采空区内低温二氧化碳置换效果的多场耦合数值模拟
- 基于碳封存条带充填采空区内低温二氧化碳置换效果的多场耦合数值模拟
- 新疆大学学报（自然科学版中英文） 2024年41卷第3期页码：364-374
- 作者机构：
  
  新疆大学地质与矿业工程学院
- 作者简介：
- 基金信息：
  
  国家自然科学基金地区项目“荒漠化矿区风积沙箱式充填体承载变形机理研究”（51964042）
- DOI：10.13568/j.cnki.651094.651316.2023.06.12.0001
  中图分类号： X51
- 纸质出版：2024
- 稿件说明：
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[1]宋永泽,张志义,刘昊,等.基于碳封存条带充填采空区内低温二氧化碳置换效果的多场耦合数值模拟[J].新疆大学学报(自然科学版)(中英文),2024,41(03):364-374.
[1]宋永泽,张志义,刘昊,等.基于碳封存条带充填采空区内低温二氧化碳置换效果的多场耦合数值模拟[J].新疆大学学报(自然科学版)(中英文),2024,41(03):364-374. DOI： 10.13568/j.cnki.651094.651316.2023.06.12.0001.

DOI：10.13568/j.cnki.651094.651316.2023.06.12.0001.

摘要

为了解条带充填采空区低温二氧化碳地质封存的压注方式对二氧化碳扩散路径和采空区气体置换时间限度的影响，以及探究压注过程采空区流场和温度场的变化规律，针对条带充填采空区的特点，提出后端压注和两端压注方式，利用Fluent数值模拟，对比两种压注方式的优劣程度．结果表明：两端压注比后端压注提前4 400 s达到置换限度；后端压注置换结果为二氧化碳体积分数达到20.1%，氧气体积分数降低4%，氮气体积分数降低16.1%；两端压注置换结果为二氧化碳体积分数达到11.2%，氧气体积分数降低2.3%，氮气体积分数降低8.9%；后端压注使采空区整体温度降低5.4℃，两端压注使采空区整体温度降低3.8℃．

Abstract

In order to understand the impact of injection methods for low-temperature carbon dioxide geological storage in strip-filled mining area on the diffusion path of CO2 and the time limit for gas replacement in mining areas

as well as to explore the changes in flow field and temperature field during the injection process

this study proposed back-end and both-ends pressurized injection methods based on the characteristics of strip-filled mining areas

and compared the advantages and disadvantages of these two injection methods using Fluent numerical simulation. The results show that the both-ends injection method reaches the replacement limit 4 400 s earlier than the back-end injection method. The CO2 volume fraction of back-end injection is 20.1%

with a decrease of 4% in oxygen volume fraction and 16.1% in nitrogen volume fraction; The both-ends injection results in a CO2 volume fraction of 11.2%

with a decrease of 2.3% in oxygen volume fraction and 8.9% in nitrogen volume fraction;Back-end injection reduces the overall temperature of the mining area by 5.4 ℃

while both-ends injection reduces the overall temperature by 3.8 ℃.

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references

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