Article(id=1236330605131133197, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1236330603000418795, articleNumber=null, orderNo=null, doi=10.3969/j.issn.0253-6099.2023.04.005, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1675612800000, receivedDateStr=2023-02-06, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1772693786175, onlineDateStr=2026-03-05, pubDate=1690819200000, pubDateStr=2023-08-01, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1772693786175, onlineIssueDateStr=2026-03-05, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1772693786175, creator=13701087609, updateTime=1772693786175, updator=13701087609, issue=Issue{id=1236330603000418795, tenantId=1146029695717560320, journalId=1235980550691926019, year='2023', volume='43', issue='4', pageStart='1', pageEnd='189', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1772693785667, creator=13701087609, updateTime=1772696855253, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1236343477835985022, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1236330603000418795, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1236343477835985023, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1236330603000418795, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=21, endPage=25, ext={EN=ArticleExt(id=1236330605810610472, articleId=1236330605131133197, tenantId=1146029695717560320, journalId=1235980550691926019, language=EN, title=Mechanical Properties and Microscopic Analysis of Alkali-Activated Backfill Material with Gold Mine Tailings Powder, columnId=1236330603948331500, journalTitle=Mining and Metallurgical Engineering, columnName=MININP, runingTitle=null, highlight=null, articleAbstract=

With gold tailings as aggregate and ground gold mine tailings (referred to as gold mine tailings powder) as precursor materials, a kind of backfill material was prepared by alkali activation with sodium hydroxide together with sodium silicate as an activating agent. The effects of several factors, including particle size of gold mine tailings powder, modulus and addition of activating agent, on the mechanical properties of backfill mass were studied. The test results show that when gold mine tailings is ground for 60 min (size d₅₀ of 5.939 μm), modulus and addition of sodium silicate in activating agent are 1.2 and 60% respectively, the prepared backfill mass can have a 28 d compressive strength of 854.2 kPa, completely up to the requirement for backfill mass stipulated in the GB/T 39489—2020 "Technical Specification for Paste Filling with Total Tailings". Due to alkali activation, gold mine tailings powder is subjected to a hydration reaction, yielding a large amount of aluminosilicate gel, which forms a dense and stable structure, resulting in the backfill mass with good mechanical properties.

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以金尾矿为骨料、粉磨后的金尾矿（简称金矿粉）为前驱体原料，以氢氧化钠+水玻璃为碱激发剂，采用碱激发方式制备充填材料，研究了金矿粉颗粒细度、碱激发剂模数及掺量对充填体力学性能的影响。结果表明，当金矿粉磨矿时间60 min（粒度d₅₀为5.939 μm）、碱激发剂水玻璃模数及掺量分别为1.2和60%时，充填体28 d抗压强度为854.2 kPa，满足GB/T 39489—2020《全尾砂膏体充填规范》对充填体强度的要求。在碱激发剂作用下，金矿粉发生水化反应，生成大量硅铝酸盐凝胶，形成密实稳定的结构，使充填体具有良好的力学性能。

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罗正东（1982—），男，湖南邵阳人，副教授，主要从事尾矿资源利用和岩土工程等方面工作。

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罗正东（1982—），男，湖南邵阳人，副教授，主要从事尾矿资源利用和岩土工程等方面工作。

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