Article(id=1278415409212797196, tenantId=1146029695717560320, journalId=1146031787341344770, issueId=1277328335906669390, articleNumber=1003-3033(2026)05-0064-09, orderNo=null, doi=10.16265/j.cnki.issn1003-3033.2026.05.1249, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1765382400000, receivedDateStr=2025-12-11, revisedDate=1773936000000, revisedDateStr=2026-03-20, acceptedDate=null, acceptedDateStr=null, onlineDate=1782727585262, onlineDateStr=2026-06-29, pubDate=1779897600000, pubDateStr=2026-05-28, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1782727585262, onlineIssueDateStr=2026-06-29, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1782727585262, creator=13701087609, updateTime=1782727585262, updator=13701087609, issue=Issue{id=1277328335906669390, tenantId=1146029695717560320, journalId=1146031787341344770, year='2026', volume='36', issue='5', pageStart='1', pageEnd='318', issueExtLink='null', onlineDate='null', pubDate='1779897600000', pubDateStr='2026-05-28', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1782468406892, creator='13701087609', updateTime=1782867658151, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1279002917143286724, tenantId=1146029695717560320, journalId=1146031787341344770, issueId=1277328335906669390, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1279002917143286725, tenantId=1146029695717560320, journalId=1146031787341344770, issueId=1277328335906669390, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=64, endPage=72, ext={EN=ArticleExt(id=1278415411276394765, articleId=1278415409212797196, tenantId=1146029695717560320, journalId=1146031787341344770, language=EN, title=Experimental and simulation study on influence of pick cone angle on coal-rock fragmentation and dust-generation characteristics, columnId=1277328337617941059, journalTitle=China Safety Science Journal, columnName=Safety Technology and Engineering, runingTitle=null, highlight=null, articleAbstract=
To investigate the influence of pick cone angle on coal-rock fragmentation and dust generation characteristics during underground roadheading operations, a multi-scale integrated approach combining experimental tests and discrete element method (DEM) simulations was adopted. Four picks with cone angles of 78, 92, 105 and 118° were selected as research objects. Roadheading cutting tests were conducted to analyze the particle size distribution of generated debris and dust. DEM simulations using the PBM in Particle Flow Code (PFC) software accurately reproduced the entire process of coal-rock fragmentation and dust generation during roadheading. The evolution trends of crack quantity, crack type, number of minimum-sized discrete particles, and ejection velocity were analyzed under two operational modes of the cutting head: penetration and slewing. The results indicate that as the cone angle increases, the coarseness index (CI) of coal wall debris decreases from 728.92 to 696.91, while the dust proportion increases from 0.4% to 0.67%, demonstrating that the degree of coal wall fragmentation and dust generation increases with pick cone angle. The fragmentation index rises and the uniformity index declines, indicating a broader dust particle size distribution and a higher proportion of fine dust particles. Simulation results show that the total number of cracks on the coal wall increases from 22 980 to 27 272, with tensile cracks consistently accounting for over 73% of the total. The number of minimum-sized free particles increases from 371 to 459, and their average initial ejection velocity decreases from 0.250 m/s to 0.221 m/s. In summary, increasing the pick cone angle intensifies dust generation to a certain extent, but helps suppress the dispersion range of dust.
, authors=Deji Jing
1, 2, 3, Zhibin Dong
1, 3, Deji Wang
1, **, Zhen Li
4, Hongwei Liu
2, 3, Chunhua Bao
2, 3, authorsList=Deji Jing, Zhibin Dong, Deji Wang, Zhen Li, Hongwei Liu, Chunhua Bao, authorCompany=null, correspAuthors=Deji Wang, 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=1278415424228405536, articleId=1278415409212797196, tenantId=1146029695717560320, journalId=1146031787341344770, language=CN, title=截齿锥角对煤岩破碎产尘特征影响的试验及模拟研究, columnId=1277328337940902469, journalTitle=中国安全科学学报, columnName=安全技术与工程, runingTitle=null, highlight=null, articleAbstract=
为探究煤矿井下掘进过程中截齿锥角对煤岩的破碎产尘特征,基于试验与离散元仿真模拟(DEM)多尺度综合分析方法,以78、92、105及118°锥角截齿为对象,通过掘进截割试验分析产生碎屑及粉尘粒度分布情况;采用颗粒流分析程序(PFC)软件中的平行黏结模型(PBM)进行仿真,准确模拟掘进中煤岩破碎产尘全过程;在截割头钻入和横摆2种工况下分析裂纹数量、种类以及最小离散颗粒数量、抛掷速度的发展变化趋势。结果表明:锥角增大时,煤壁碎屑粗糙度指数(CI)从728.92下降到696.91、粉尘占比从0.4%增至0.67%,煤壁破碎程度与产尘量随截齿锥角增大而提升;粉尘破碎指数上升、均匀性指数下降,表明产尘粒度分布范围扩大且小粒径粉尘比重增加;仿真模拟中煤壁裂纹总数从22 980条增长至27 272条,且拉伸裂纹占比均超 73%;最小粒径游离颗粒数量从371个增至459个,平均初始抛掷速度从0.250 m/s减至0.221 m/s。综上,增大截齿锥角在一定程度上加剧了产尘,但有助于抑制粉尘扩散范围。
, authors=荆德吉
1, 2, 3, 董智斌
1, 3, 王德记
1, **, 李振
4, 刘鸿威
2, 3, 鲍春花
2, 3, authorsList=荆德吉, 董智斌, 王德记, 李振, 刘鸿威, 鲍春花, authorCompany=null, correspAuthors=王德记, authorNote=
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1, 2, 3, address=
1 College of Mining Engineering, Liaoning Technical University, Fuxin Liaoning 123000, China
2 College of Safety Science and Engineering, Liaoning Technical University, Fuxin Liaoning 123000, China
3 Erdos Research Institute of Liaoning Technical University, Erdos Inner Mongolia 017000, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1278415746363539957, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, authorId=1278415744316719600, language=CN, stringName=荆德吉, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, 3, address=
1 辽宁工程技术大学 矿业学院, 辽宁 阜新 123000
2 辽宁工程技术大学 安全科学与工程学院, 辽宁 阜新 123000
3 辽宁工程技术大学 鄂尔多斯研究院, 内蒙古 鄂尔多斯 017000, bio={"content":"
荆德吉 (1984—),男,辽宁抚顺人,博士,教授,主要从事粉尘防治理论与技术、矿井通风与职业安全健康等方面的研究。E-mail: jingdeji@lntu.edu.cn。
"}, bioImg=null, bioContent=
荆德吉 (1984—),男,辽宁抚顺人,博士,教授,主要从事粉尘防治理论与技术、矿井通风与职业安全健康等方面的研究。E-mail: jingdeji@lntu.edu.cn。
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1, 3, address=
1 College of Mining Engineering, Liaoning Technical University, Fuxin Liaoning 123000, China
3 Erdos Research Institute of Liaoning Technical University, Erdos Inner Mongolia 017000, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1278415746669724155, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, authorId=1278415746493563383, language=CN, stringName=董智斌, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 3, address=
1 辽宁工程技术大学 矿业学院, 辽宁 阜新 123000
3 辽宁工程技术大学 鄂尔多斯研究院, 内蒙古 鄂尔多斯 017000, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1278415743872123360, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, xref=1, ext=[AuthorCompanyExt(id=1278415743884706273, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, companyId=1278415743872123360, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 College of Mining Engineering, Liaoning Technical University, Fuxin Liaoning 123000, China), AuthorCompanyExt(id=1278415743897289187, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, companyId=1278415743872123360, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 辽宁工程技术大学 矿业学院, 辽宁 阜新 123000)]), AuthorCompany(id=1278415744048284137, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, xref=3, ext=[AuthorCompanyExt(id=1278415744060867050, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, companyId=1278415744048284137, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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3 辽宁工程技术大学 鄂尔多斯研究院, 内蒙古 鄂尔多斯 017000)])]), Author(id=1278415748393583101, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, orderNo=2, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=wdj838133064@163.com, emailSecond=null, emailThird=null, correspondingAuthor=1, authorType=1, ext={EN=AuthorExt(id=1278415748502635007, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, authorId=1278415748393583101, language=EN, stringName=Deji Wang, firstName=Deji, middleName=null, lastName=Wang, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, **, address=
1 College of Mining Engineering, Liaoning Technical University, Fuxin Liaoning 123000, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1278415748582326784, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, authorId=1278415748393583101, language=CN, stringName=王德记, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, **, address=
1 辽宁工程技术大学 矿业学院, 辽宁 阜新 123000, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1278415743872123360, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, xref=1, ext=[AuthorCompanyExt(id=1278415743884706273, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, companyId=1278415743872123360, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 College of Mining Engineering, Liaoning Technical University, Fuxin Liaoning 123000, China), AuthorCompanyExt(id=1278415743897289187, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, companyId=1278415743872123360, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 辽宁工程技术大学 矿业学院, 辽宁 阜新 123000)])]), Author(id=1278415748649435650, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, orderNo=3, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1278415748737516036, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, authorId=1278415748649435650, language=EN, stringName=Zhen Li, firstName=Zhen, middleName=null, lastName=Li, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
4, address=
4 College of Resources and Environmental Engineering, Jilin University of Chemical Technology, Jilin Jilin 132000, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1278415748808819205, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, authorId=1278415748649435650, language=CN, stringName=李振, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
4, address=
4 吉林化工大学 资源与环境工程学院, 吉林 吉林 132000, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1278415744144753132, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, xref=4, ext=[AuthorCompanyExt(id=1278415744178307565, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, companyId=1278415744144753132, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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4 吉林化工大学 资源与环境工程学院, 吉林 吉林 132000)])]), Author(id=1278415748905288199, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, orderNo=4, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1278415748989174282, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, authorId=1278415748905288199, language=EN, stringName=Hongwei Liu, firstName=Hongwei, middleName=null, lastName=Liu, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
2, 3, address=
2 College of Safety Science and Engineering, Liaoning Technical University, Fuxin Liaoning 123000, China
3 Erdos Research Institute of Liaoning Technical University, Erdos Inner Mongolia 017000, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1278415749060477451, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, authorId=1278415748905288199, language=CN, stringName=刘鸿威, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
2, 3, address=
2 辽宁工程技术大学 安全科学与工程学院, 辽宁 阜新 123000
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Roxborough F F,
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5(1):45-67., articleTitle=The mechanical cutting characteristics of the lower chalk, refAbstract=null), Reference(id=1278415763019121238, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, doi=null, pmid=null, pmcid=null, year=2023, volume=44, issue=4, pageStart=1153, pageEnd=1164, url=null, language=null, rfNumber=[16], rfOrder=23, authorNames=闫长斌, 李高留, 陈健, journalName=岩土力学, refType=null, unstructuredReference=闫长斌, 李高留, 陈健,
等. 基于新表面理论的TBM破岩效率评价指标[J].
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44(4): 1153-1164., articleTitle=A novel evaluation index of TBM rock-breaking efficiency based on newly added surfaces theory, refAbstract=null)], funds=[Fund(id=1278415755263853114, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, awardId=52474229, language=CN, fundingSource=国家自然科学基金资助(52474229), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1278415743872123360, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, xref=1, ext=[AuthorCompanyExt(id=1278415743884706273, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, companyId=1278415743872123360, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 College of Mining Engineering, Liaoning Technical University, Fuxin Liaoning 123000, China), AuthorCompanyExt(id=1278415743897289187, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, companyId=1278415743872123360, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1 辽宁工程技术大学 矿业学院, 辽宁 阜新 123000)]), AuthorCompany(id=1278415743976980965, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, xref=2, ext=[AuthorCompanyExt(id=1278415743985369574, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, companyId=1278415743976980965, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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3 Erdos Research Institute of Liaoning Technical University, Erdos Inner Mongolia 017000, China), AuthorCompanyExt(id=1278415744065061355, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, companyId=1278415744048284137, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
3 辽宁工程技术大学 鄂尔多斯研究院, 内蒙古 鄂尔多斯 017000)]), AuthorCompany(id=1278415744144753132, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, xref=4, ext=[AuthorCompanyExt(id=1278415744178307565, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, companyId=1278415744144753132, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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4 吉林化工大学 资源与环境工程学院, 吉林 吉林 132000)])], figs=[ArticleFig(id=1278415750440403484, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=EN, label=Fig.1, caption=
Pick cutting coal-rock dust generation process, figureFileSmall=POBOeWjkFj1S8vCYDJ2hYA==, figureFileBig=eRvm64e1aI0ELqc/O6NPmg==, tableContent=null), ArticleFig(id=1278415750562038301, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=CN, label=图1, caption=
截齿截割煤岩产尘过程, figureFileSmall=POBOeWjkFj1S8vCYDJ2hYA==, figureFileBig=eRvm64e1aI0ELqc/O6NPmg==, tableContent=null), ArticleFig(id=1278415750696256030, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=EN, label=Fig.2, caption=
Tunneling cutting experimental platform, figureFileSmall=NJuR2Wt4TPfS6zZfSYfgcQ==, figureFileBig=k+9NAXNtBcH8ziZlUWmeCA==, tableContent=null), ArticleFig(id=1278415750763364895, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=CN, label=图2, caption=
掘进截割试验平台, figureFileSmall=NJuR2Wt4TPfS6zZfSYfgcQ==, figureFileBig=k+9NAXNtBcH8ziZlUWmeCA==, tableContent=null), ArticleFig(id=1278415750826279456, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=EN, label=Fig.3, caption=
Debris screening results, figureFileSmall=Mgp1fCm+Za0WmzJU2KyNEw==, figureFileBig=LQ6XIFapuTxiXxh2VUkzyw==, tableContent=null), ArticleFig(id=1278415750926942753, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=CN, label=图3, caption=
碎屑筛分结果, figureFileSmall=Mgp1fCm+Za0WmzJU2KyNEw==, figureFileBig=LQ6XIFapuTxiXxh2VUkzyw==, tableContent=null), ArticleFig(id=1278415750998245922, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=EN, label=Fig.4, caption=
Rosin-Rammler fitting curve, figureFileSmall=o43DQe35DhKOUqXxeRoyeQ==, figureFileBig=PG12LUyq5EpmPKYaYIL6zA==, tableContent=null), ArticleFig(id=1278415751090520611, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=CN, label=图4, caption=
Rosin-Rammler拟合曲线, figureFileSmall=o43DQe35DhKOUqXxeRoyeQ==, figureFileBig=PG12LUyq5EpmPKYaYIL6zA==, tableContent=null), ArticleFig(id=1278415752764047908, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=EN, label=Fig.5, caption=
PBM, figureFileSmall=mZekKbbornBr+F7GZdbwlg==, figureFileBig=8IScWZmCnmT08x4ZbNH2QA==, tableContent=null), ArticleFig(id=1278415752852128293, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=CN, label=图5, caption=
PBM, figureFileSmall=mZekKbbornBr+F7GZdbwlg==, figureFileBig=8IScWZmCnmT08x4ZbNH2QA==, tableContent=null), ArticleFig(id=1278415753015706150, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=EN, label=Fig.6, caption=
Constitutive relation diagram of PBM, figureFileSmall=50ku3JlqfHiOhBFgs2fiyQ==, figureFileBig=qte4oSmxDZqfnP58vJ0u+Q==, tableContent=null), ArticleFig(id=1278415753112175143, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=CN, label=图6, caption=
PBM本构关系, figureFileSmall=50ku3JlqfHiOhBFgs2fiyQ==, figureFileBig=qte4oSmxDZqfnP58vJ0u+Q==, tableContent=null), ArticleFig(id=1278415753183478312, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=EN, label=Fig.7, caption=
Coal cutting process in tunneling, figureFileSmall=ON5zE56JSoxxeGBKS6w7Zw==, figureFileBig=7/UG2T7kXzMxv2AwoVLHZg==, tableContent=null), ArticleFig(id=1278415753460302377, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=CN, label=图7, caption=
掘进割煤过程, figureFileSmall=ON5zE56JSoxxeGBKS6w7Zw==, figureFileBig=7/UG2T7kXzMxv2AwoVLHZg==, tableContent=null), ArticleFig(id=1278415753544188458, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=EN, label=Fig.8, caption=
Particle distribution and bonding failure modes (microcracks) after two working conditions, figureFileSmall=j/BNJE3cnLzBmstM54CO1w==, figureFileBig=WSfWqwOt7+jQLQt22livbQ==, tableContent=null), ArticleFig(id=1278415753611297323, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=CN, label=图8, caption=
2种工况后颗粒分布及黏结键破坏方式(微裂纹), figureFileSmall=j/BNJE3cnLzBmstM54CO1w==, figureFileBig=WSfWqwOt7+jQLQt22livbQ==, tableContent=null), ArticleFig(id=1278415753921675820, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=EN, label=Fig.9, caption=
Change trend of average ejection velocity of minimum-sized discrete particles, figureFileSmall=e4LmIfnHDgAjmpVA+J0HSg==, figureFileBig=j+GEd/P2ouNu9qkFYVR3Tw==, tableContent=null), ArticleFig(id=1278415754005561901, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=CN, label=图9, caption=
最小离散颗粒平均抛掷速度变化趋势, figureFileSmall=e4LmIfnHDgAjmpVA+J0HSg==, figureFileBig=j+GEd/P2ouNu9qkFYVR3Tw==, tableContent=null), ArticleFig(id=1278415754219471406, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=EN, label=Table 1, caption=
Analysis of coal fragmentation by picks with different cone angles
, figureFileSmall=null, figureFileBig=null, tableContent=
| 粒径 | 筛余率/% |
| 78° | 92° | 105° | 118° |
| >20 mm | 60.30 | 54.36 | 54.58 | 48.89 |
| 10~20 mm | 82.19 | 76.87 | 77.59 | 71.56 |
| 0.85~10 mm | 93.17 | 91.13 | 86.85 | 89.33 |
| 0.3~0.85 mm | 96.54 | 96.02 | 92.91 | 93.46 |
| 0.18~0.3 mm | 98.07 | 97.88 | 96.98 | 96.24 |
| 0.125~0.18 mm | 99.05 | 98.77 | 98.50 | 98.10 |
| 75~125 μm | 99.60 | 99.53 | 99.46 | 99.33 |
| <75 μm | 100.00 | 100.00 | 100.00 | 100.00 |
| CI | 728.92 | 714.56 | 706.87 | 696.91 |
), ArticleFig(id=1278415754336911919, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=CN, label=表1, caption=
不同锥角截齿割煤碎屑分析
, figureFileSmall=null, figureFileBig=null, tableContent=
| 粒径 | 筛余率/% |
| 78° | 92° | 105° | 118° |
| >20 mm | 60.30 | 54.36 | 54.58 | 48.89 |
| 10~20 mm | 82.19 | 76.87 | 77.59 | 71.56 |
| 0.85~10 mm | 93.17 | 91.13 | 86.85 | 89.33 |
| 0.3~0.85 mm | 96.54 | 96.02 | 92.91 | 93.46 |
| 0.18~0.3 mm | 98.07 | 97.88 | 96.98 | 96.24 |
| 0.125~0.18 mm | 99.05 | 98.77 | 98.50 | 98.10 |
| 75~125 μm | 99.60 | 99.53 | 99.46 | 99.33 |
| <75 μm | 100.00 | 100.00 | 100.00 | 100.00 |
| CI | 728.92 | 714.56 | 706.87 | 696.91 |
), ArticleFig(id=1278415754416603696, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=EN, label=Table 2, caption=
Cumulative mass fraction of dust generated by picks with different cone angles
, figureFileSmall=null, figureFileBig=null, tableContent=
| 粒径/μm | 78° | 92° | 105° | 118° |
| 0 | 100.00 | 100.00 | 100.00 | 100.00 |
| 15 | 94.20 | 93.55 | 92.75 | 92.07 |
| 25 | 80.06 | 82.92 | 83.00 | 81.21 |
| 35 | 73.19 | 70.04 | 69.22 | 71.07 |
| 45 | 58.48 | 61.84 | 57.36 | 56.64 |
| 55 | 46.39 | 47.32 | 50.79 | 46.18 |
| 65 | 33.70 | 32.55 | 31.47 | 31.66 |
| 75 | 0.00 | 0.00 | 0.00 | 0.00 |
), ArticleFig(id=1278415754487906865, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=CN, label=表2, caption=
不同锥角截齿产尘的累计质量分数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 粒径/μm | 78° | 92° | 105° | 118° |
| 0 | 100.00 | 100.00 | 100.00 | 100.00 |
| 15 | 94.20 | 93.55 | 92.75 | 92.07 |
| 25 | 80.06 | 82.92 | 83.00 | 81.21 |
| 35 | 73.19 | 70.04 | 69.22 | 71.07 |
| 45 | 58.48 | 61.84 | 57.36 | 56.64 |
| 55 | 46.39 | 47.32 | 50.79 | 46.18 |
| 65 | 33.70 | 32.55 | 31.47 | 31.66 |
| 75 | 0.00 | 0.00 | 0.00 | 0.00 |
), ArticleFig(id=1278415754563404338, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=EN, label=Table 3, caption=
Fitting parameters a and s of dust generation for picks with different cone angles
, figureFileSmall=null, figureFileBig=null, tableContent=
| 锥角/(°) | a | s |
| 78 | 0.000 386 172 | 1.903 60 |
| 92 | 0.000 437 865 | 1.866 87 |
| 105 | 0.000 573 615 | 1.801 85 |
| 118 | 0.000 696 210 | 1.760 67 |
), ArticleFig(id=1278415754626318899, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=CN, label=表3, caption=
不同锥角截齿产尘拟合曲线a、s值
, figureFileSmall=null, figureFileBig=null, tableContent=
| 锥角/(°) | a | s |
| 78 | 0.000 386 172 | 1.903 60 |
| 92 | 0.000 437 865 | 1.866 87 |
| 105 | 0.000 573 615 | 1.801 85 |
| 118 | 0.000 696 210 | 1.760 67 |
), ArticleFig(id=1278415754693427764, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=EN, label=Table 4, caption=
Macroscopic parameters and calibration results of coal-rock
, figureFileSmall=null, figureFileBig=null, tableContent=
| 类别 | 单轴抗压强 度/MPa | 抗拉强 度/MPa | 弹性模 量/GPa |
| 物理试验 | 19.39 | 2.35 | 2.74 |
| 仿真标定 | 19.55 | 2.50 | 2.82 |
), ArticleFig(id=1278415754777313845, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=CN, label=表4, caption=
煤岩宏观参数及标定结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 类别 | 单轴抗压强 度/MPa | 抗拉强 度/MPa | 弹性模 量/GPa |
| 物理试验 | 19.39 | 2.35 | 2.74 |
| 仿真标定 | 19.55 | 2.50 | 2.82 |
), ArticleFig(id=1278415754898948662, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=EN, label=Table 5, caption=
Microscopic parameters of coal wall
, figureFileSmall=null, figureFileBig=null, tableContent=
黏结弹 性模量/ GPa | 黏结抗 拉强度/ MPa | 黏结刚 度比 | 摩擦因 数 | 黏结摩 擦角/ (°) | 黏聚 力/ MPa |
| 3.41 | 4.03 | 1.5 | 0.67 | 36.5 | 6.46 |
), ArticleFig(id=1278415754970251831, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=CN, label=表5, caption=
煤壁细观参数
, figureFileSmall=null, figureFileBig=null, tableContent=
黏结弹 性模量/ GPa | 黏结抗 拉强度/ MPa | 黏结刚 度比 | 摩擦因 数 | 黏结摩 擦角/ (°) | 黏聚 力/ MPa |
| 3.41 | 4.03 | 1.5 | 0.67 | 36.5 | 6.46 |
), ArticleFig(id=1278415755037360696, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=EN, label=Table 6, caption=
Number of minimum-sized free discrete particles
, figureFileSmall=null, figureFileBig=null, tableContent=
| 锥角/(°) | 工况 | 数量/颗 | 总计 |
| 78 | 钻入 | 171 | 371 |
| 横摆 | 200 |
| 92 | 钻入 | 193 | 424 |
| 横摆 | 231 |
| 105 | 钻入 | 208 | 453 |
| 横摆 | 245 |
| 118 | 钻入 | 212 | 459 |
| 横摆 | 247 |
), ArticleFig(id=1278415755121246777, tenantId=1146029695717560320, journalId=1146031787341344770, articleId=1278415409212797196, language=CN, label=表6, caption=
游离最小离散颗粒数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 锥角/(°) | 工况 | 数量/颗 | 总计 |
| 78 | 钻入 | 171 | 371 |
| 横摆 | 200 |
| 92 | 钻入 | 193 | 424 |
| 横摆 | 231 |
| 105 | 钻入 | 208 | 453 |
| 横摆 | 245 |
| 118 | 钻入 | 212 | 459 |
| 横摆 | 247 |
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