Effect of Mine Water Environment on Durability of Solid Backfilling Based on Carbonated Coal-Based Waste

IF 4.3 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

ACS Omega Pub Date : 2025-04-25 DOI:10.1021/acsomega.4c1149510.1021/acsomega.4c11495

Zhishang Zhang, Liqiang Ma*, Ichhuy Ngo*, Chengkun Peng, Jiangtao Zhai and Zezhou Guo,

{"title":"Effect of Mine Water Environment on Durability of Solid Backfilling Based on Carbonated Coal-Based Waste","authors":"Zhishang Zhang, Liqiang Ma*, Ichhuy Ngo*, Chengkun Peng, Jiangtao Zhai and Zezhou Guo, ","doi":"10.1021/acsomega.4c1149510.1021/acsomega.4c11495","DOIUrl":null,"url":null,"abstract":"The durability of solid backfilling based on carbonated coal-based waste (CCBW) under mine water environments is critical for its engineering feasibility. This study investigates the deterioration mechanisms of CCBW exposed to acid solution (Acid W), alkaline solution (Alkaline W), and mine water (Mine W) through hydrochemical analysis, XRD, and SEM. Results reveal that the uniaxial compressive strength of CCBW decreased by 10.05, 3.93, and 1.62% after 28 days of immersion in the groups, respectively. Acid conditions induced CaCO3 dissolution and gypsum formation, while alkaline environments triggered alkali–silica reaction expansion. Mine water exhibited minimal impact due to suspended particles mitigating ion exchange. Carbonation also enhanced the durability of CCBW by forming dense CaCO3 clusters and C-A-S-H gels, thus reducing ion leaching. Notably, the average erosion resistance of carbonated samples (CCBW-5, 10, 30) was 2.32% higher than that of noncarbonated counterparts. These findings confirm the feasibility of CCBW applications in weakly alkaline mine water and highlight its potential for sustainable coal mining practices, aligning with carbon capture and circular economy principles.","PeriodicalId":22,"journal":{"name":"ACS Omega","volume":"10 17","pages":"17626–17641 17626–17641"},"PeriodicalIF":4.3000,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsomega.4c11495","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Omega","FirstCategoryId":"92","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acsomega.4c11495","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

The durability of solid backfilling based on carbonated coal-based waste (CCBW) under mine water environments is critical for its engineering feasibility. This study investigates the deterioration mechanisms of CCBW exposed to acid solution (Acid W), alkaline solution (Alkaline W), and mine water (Mine W) through hydrochemical analysis, XRD, and SEM. Results reveal that the uniaxial compressive strength of CCBW decreased by 10.05, 3.93, and 1.62% after 28 days of immersion in the groups, respectively. Acid conditions induced CaCO₃ dissolution and gypsum formation, while alkaline environments triggered alkali–silica reaction expansion. Mine water exhibited minimal impact due to suspended particles mitigating ion exchange. Carbonation also enhanced the durability of CCBW by forming dense CaCO₃ clusters and C-A-S-H gels, thus reducing ion leaching. Notably, the average erosion resistance of carbonated samples (CCBW-5, 10, 30) was 2.32% higher than that of noncarbonated counterparts. These findings confirm the feasibility of CCBW applications in weakly alkaline mine water and highlight its potential for sustainable coal mining practices, aligning with carbon capture and circular economy principles.

查看原文本刊更多论文

矿井水环境对碳酸煤基废弃物固体充填体耐久性的影响

矿井水环境下碳酸煤矸石固体充填体的耐久性是影响其工程可行性的关键因素。本研究通过水化学分析、XRD、SEM等研究了CCBW在酸性溶液（acid W）、碱性溶液（alkaline W）和矿用水（mine W）中的变质机理。结果表明：浸泡28 d后，各组CCBW的单轴抗压强度分别下降10.05、3.93和1.62%；酸性环境诱发CaCO3溶解和石膏形成，碱性环境诱发碱-硅反应膨胀。由于悬浮颗粒减缓了离子交换，矿井水的影响最小。碳化还通过形成致密的CaCO3团簇和C-A-S-H凝胶增强了CCBW的耐久性，从而减少了离子浸出。值得注意的是，碳化样品（CCBW-5、10、30）的平均耐蚀性比未碳化样品高2.32%。这些发现证实了CCBW在弱碱性矿井水中应用的可行性，并强调了其在符合碳捕获和循环经济原则的可持续煤炭开采实践中的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

ACS Omega Chemical Engineering-General Chemical Engineering

CiteScore

6.60

自引率

4.90%

发文量

3945

审稿时长

2.4 months

期刊介绍： ACS Omega is an open-access global publication for scientific articles that describe new findings in chemistry and interfacing areas of science, without any perceived evaluation of immediate impact.