Article(id=1322559851469849479, tenantId=1146029695717560320, journalId=1225396423026438145, issueId=1322559792544072145, articleNumber=null, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1728835200000, receivedDateStr=2024-10-14, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1793252440564, onlineDateStr=2026-10-29, pubDate=1769270400000, pubDateStr=2026-01-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793252440564, onlineIssueDateStr=2026-10-29, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793252440564, creator=13701087609, updateTime=1793252440564, updator=13701087609, issue=Issue{id=1322559792544072145, tenantId=1146029695717560320, journalId=1225396423026438145, year='2026', volume='46', issue='1', pageStart='1', pageEnd='306', issueExtLink='null', onlineDate='null', pubDate='1769270400000', pubDateStr='2026-01-25', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1793252426515, creator='13701087609', updateTime=1793252675339, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1322560836246286849, tenantId=1146029695717560320, journalId=1225396423026438145, issueId=1322559792544072145, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1322560836246286850, tenantId=1146029695717560320, journalId=1225396423026438145, issueId=1322559792544072145, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=237, endPage=245, ext={EN=ArticleExt(id=1322559852124160904, articleId=1322559851469849479, tenantId=1146029695717560320, journalId=1225396423026438145, language=EN, title=Effects of Intrusion Angle of Picks on Mechanical Rock Breaking Efficiency Under Varying Stress Levels, columnId=null, journalTitle=Mining Research and Development, columnName=null, runingTitle=null, highlight=null, articleAbstract=

Non-explosive mechanical excavation mining has the advantages of small disturbance, high efficiency, low support cost and good roadway shaping effect compared with drilling and blasting method, and the optimal selection of pick parameters is of great significance to efficient excavation. Based on the measured ground stress data and rock mechanics test results of the -525 m, -606 m, and -653 m sections of a certain metal mine, a PFC particle flow rock breaking model of picks was established. Numerical simulation analysis of pick rock breaking after unidirectional unloading was conducted with three types of intrusion angle of 90°, 60°, and 45° under three different stress levels in the middle section. The research results indicate that as the stress level increases, the area of dense nuclei formed by the pick breaking decreases, the length of the strip-shaped crack propagation shortens, and the number of microcracks generated during the rock breaking process also decreases, indicating that high stress conditions have a suppressive effect on rock fragmentation. Under the 45° intrusion angle rock breaking mining, the traction and cutting force fluctuations of the cutting tooth are small and the cutting force always maintains a high level. At the same time, the number of microcracks generated by rock breaking at a 45° intrusion angle is much greater than that at 60° and 90° intrusion angles. Combining the comprehensive analysis of mechanical response and rock fragmentation effect, the 45° intrusion angle has the optimal rock breaking performance at varying stress levels.

, authors=Weixing LIN¹, Yongchao GONG¹, Shaofeng WANG², Tubing YIN², Jintao LU¹, Weihao ZENG³, authorsList=Weixing LIN, Yongchao GONG, Shaofeng WANG, Tubing YIN, Jintao LU, Weihao ZENG, authorCompany=null, correspAuthors=Yongchao GONG, 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=1322559852564562825, articleId=1322559851469849479, tenantId=1146029695717560320, journalId=1225396423026438145, language=CN, title=不同应力水平下截齿侵入角度对机械破岩效果的影响, columnId=1226462295946085268, journalTitle=矿业研究与开发, columnName=矿山机电与矿业智能化, runingTitle=null, highlight=null, articleAbstract=

非爆破机械掘进采矿相对于钻爆法具有扰动小、效率高、支护成本低、巷道成型效果好等优点，优化选取截齿参数对高效掘进具有重要意义。根据某金属矿山-525 m、-606 m、-653 m中段地应力实测数据及围岩力学试验结果，建立PFC颗粒流截齿破岩模型，在三个中段应力水平下设置90°、60°、45°三种截齿侵入角度进行单向卸荷后的截齿破岩数值模拟分析。研究结果表明，伴随应力水平上升，截齿破岩形成的密实核面积减小，条状裂纹扩展长度缩短，破岩过程中产生的微裂纹数量也随之减少，表明高应力条件对岩石破碎具有抑制作用；45°侵入角破岩工况下截齿的牵引力及切割力波动程度较小且切割力始终保持较高水平；同时，45°侵入角破岩产生的微裂纹数量也远大于60°和90°侵入角。综合力学响应与岩石破碎效果分析，45°侵入角在不同应力水平下均具有最优的破岩性能。

, authors=林卫星¹, 龚永超¹, 王少峰², 尹土兵², 陆锦涛¹, 曾维豪³, authorsList=林卫星, 龚永超, 王少峰, 尹土兵, 陆锦涛, 曾维豪, authorCompany=null, correspAuthors=龚永超, authorNote=, correspAuthorsNote=, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=nplx+A9HYRSr1PPUiLDNug==, magXml=f2KpE222w6psWE8nxuyP2Q==, pdfUrl=null, pdf=yqZ1Y2jhhnLWlt6JOhiz3g==, pdfFileSize=7403962, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=JvshhJS5VLYhRlPVHuncJQ==, mapNumber=null, fund=null)}, authors=[Author(id=1322559853806076820, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1322559851469849479, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=lwx09@163.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1322559855471215510, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1322559851469849479, authorId=1322559853806076820, language=EN, stringName=Weixing LIN, firstName=Weixing, middleName=null, lastName=LIN, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=¹, address=^1.Changsha Institute of Mining Research Co., Ltd., Changsha, Hunan 410012, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1322559855542518679, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1322559851469849479, authorId=1322559853806076820, language=CN, stringName=林卫星, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=¹, address=^1．长沙矿山研究院有限责任公司，湖南 长沙　410012, bio={"content":"

林卫星（1983—），男，湖南怀化人，博士，正高级工程师，主要从事金属矿山采矿工程技术研究。E-mail:lwx09@163.com

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林卫星（1983—），男，湖南怀化人，博士，正高级工程师，主要从事金属矿山采矿工程技术研究。E-mail:lwx09@163.com

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