Article(id=1236327866045092253, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1236327863171993957, articleNumber=null, orderNo=null, doi=10.3969/j.issn.0253-6099.2023.02.006, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1666886400000, receivedDateStr=2022-10-28, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1772693133126, onlineDateStr=2026-03-05, pubDate=1680278400000, pubDateStr=2023-04-01, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1772693133126, onlineIssueDateStr=2026-03-05, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1772693133126, creator=13701087609, updateTime=1772693133126, updator=13701087609, issue=Issue{id=1236327863171993957, tenantId=1146029695717560320, journalId=1235980550691926019, year='2023', volume='43', issue='2', pageStart='1', pageEnd='170', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1772693132441, creator=13701087609, updateTime=1772693403732, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1236329001107640372, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1236327863171993957, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1236329001107640373, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1236327863171993957, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=26, endPage=29, ext={EN=ArticleExt(id=1236327866309333421, articleId=1236327866045092253, tenantId=1146029695717560320, journalId=1235980550691926019, language=EN, title=Roof Rock Quality Evaluation for Roadway of №92 Ore Body in Tongkeng Mine, columnId=1236276106018484431, journalTitle=Mining and Metallurgical Engineering, columnName=MINING, runingTitle=null, highlight=null, articleAbstract=

With a transport roadway at+392 m section of №92 ore body in Tongkeng Mine as an example, the testing area was firstly divided for investigating the required on-site data. Then, the roadway roof rock was scored by using mining rock mass rating (MRMR) system for rock quality classification and rating. Finally, an appropriate support measure was proposed for the roadway roof based on the grading result. It is shown that the roof rock mass has its score of 50 by RMR system and is rated to be Grade Ⅲ. However, with the modified MRMR system, the rock mass has its score of 29 and is rated to be Grade IV. Compared with the on-site actual investigation of structural plane, the rating result by using MRMR system is much more consistent with actual situation.

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以铜坑矿92号矿体+392 m中段某运输巷道为例，首先划分试验区并调查所需现场数据，然后采用MRMR岩石质量分类系统对巷道顶板岩体评分并确定其质量等级，最后基于分级结果给出合适的巷道顶板支护措施建议。结果表明，RMR法评分为50，属于Ⅲ级岩体，修正后的MRMR方法评分为29，属于IV级岩体，由现场结构面调查情况可知，MRMR方法分级结果与实际情况更相符。

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杨子超（1996—），男，陕西西安人，硕士研究生，主要从事裂隙岩体几何效应研究。

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杨子超（1996—），男，陕西西安人，硕士研究生，主要从事裂隙岩体几何效应研究。

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