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Aiming at the problem of pillar stability, acoustic emission (AE) tests of rock specimen failure, PFC simulation of pillar failure, and pillar stability monitoring and early warning research were carried out. AE tests of rock specimens under simple loading and incremental cyclic loading-unloading conditions and PFC simulation of pillar failure were carried out. The stress-AE evolution characteristics during pillar failure were analyzed, and four stages of pillar failure were proposed, namely initial incubation stage, low-speed incubation stage, accelerated incubation stage and failure stage. Based on the stress-AE evolution characteristics of pillar failure, the pillar failure instability criteria of increased stress-stable AE, stable stress-stable AE, reduced stress-stable AE, increased stress-increased AE and reduced stress-increased AE modes were proposed. Based on the pillar failure criteria, a staging monitoring and early warning method for pillar stability is established, and a pillar stability monitoring and early warning platform was developed. The staging monitoring and early warning method for pillar failure and the pillar stability monitoring and early warning platform show good performance in field engineering applications. After pillar 2-45^# enters the increased stress-increased AE stage, the mine issues a red warning. Longitudinal cracks appear in the pillar 39 days later, and overall failure occurs 90 days later. After pillar 2-105^# enters the increased stress-stable AE stage, the mine issues a yellow warning. Local spalling occurs in the middle of the pillar 38 days later. The research results are of great significance for quantitatively evaluating pillar stability and ensuring safe production in mines.

, authors=Fuhua PENG^{1, 2, 3}, Weijun WANG¹, Jingyun HU^{2, 3}, Yi PAN^{2, 3}, Yinghua HUANG^{2, 3}, authorsList=Fuhua PENG, Weijun WANG, Jingyun HU, Yi PAN, Yinghua HUANG, authorCompany=null, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1322559933778867088, articleId=1322559933409768334, tenantId=1146029695717560320, journalId=1225396423026438145, language=CN, title=矿柱破裂失稳演化特征与监测预警应用研究, columnId=1226462295417598973, journalTitle=矿业研究与开发, columnName=矿山安全与环保, runingTitle=null, highlight=null, articleAbstract=

针对矿柱稳定性问题进行了岩石试件破坏声发射试验、矿柱破坏PFC模拟与稳定性监测预警研究。开展了简单加载和增量循环加卸载工况下岩石试件声发射试验和矿柱破坏PFC模拟，分析了矿柱破坏过程应力－声发射演化特征，提出了矿柱破坏初始孕育期、矿柱破坏低速孕育期、矿柱破坏加速孕育期和矿柱破坏期4个阶段。利用矿柱破坏应力－声发射演化特征，提出了增压稳声模式、稳压稳声模式、降压稳声模式、增压增声模式和降压增声模式的矿柱破坏判别准则。基于矿柱破坏判别准则，建立了矿柱稳定性分期监测预警方法，并开发了矿柱稳定性监测预警平台。矿柱破坏分期监测预警方法和矿柱稳定性监测预警平台在现场工程应用的效果较好，2-45^#矿柱在进入增压增声阶段后，矿山发出红色预警，39 d后矿柱出现纵向裂缝，90 d后矿柱出现整体破坏；2-105^#矿柱在进入增压稳声阶段后，矿山发出黄色预警，38 d后矿柱中间部位局部发生片冒。研究结果对量化评估矿柱稳定性、保障矿山安全生产具有重要意义。

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彭府华（1987—），男，江西井冈山人，博士研究生，高级工程师，主要从事矿山岩土灾害防治研究工作。E-mail: fuhuapeng@126.com

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彭府华（1987—），男，江西井冈山人，博士研究生，高级工程师，主要从事矿山岩土灾害防治研究工作。E-mail: fuhuapeng@126.com

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