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<front>
<journal-meta>
<journal-id journal-id-type="publisher-id">Front. Earth Sci.</journal-id>
<journal-title>Frontiers in Earth Science</journal-title>
<abbrev-journal-title abbrev-type="pubmed">Front. Earth Sci.</abbrev-journal-title>
<issn pub-type="epub">2296-6463</issn>
<publisher>
<publisher-name>Frontiers Media S.A.</publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="publisher-id">777904</article-id>
<article-id pub-id-type="doi">10.3389/feart.2021.777904</article-id>
<article-categories>
<subj-group subj-group-type="heading">
<subject>Earth Science</subject>
<subj-group>
<subject>Correction</subject>
</subj-group>
</subj-group>
</article-categories>
<title-group>
<article-title>Corrigendum: On the Determination of Coordination Numbers of Coupled DEM-DFN Model for Modeling Fractured Rocks</article-title>
<alt-title alt-title-type="left-running-head">Xu et&#x20;al.</alt-title>
<alt-title alt-title-type="right-running-head">Corrigendum: Modeling Fractured Rocks</alt-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname>Xu</surname>
<given-names>Xiaoyi</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
<xref ref-type="aff" rid="aff2">
<sup>2</sup>
</xref>
<uri xlink:href="https://loop.frontiersin.org/people/1214094/overview"/>
</contrib>
<contrib contrib-type="author" corresp="yes">
<name>
<surname>Fu</surname>
<given-names>Li-Yun</given-names>
</name>
<xref ref-type="aff" rid="aff3">
<sup>3</sup>
</xref>
<xref ref-type="corresp" rid="c001">&#x2a;</xref>
</contrib>
<contrib contrib-type="author" corresp="yes">
<name>
<surname>Liu</surname>
<given-names>Ning</given-names>
</name>
<xref ref-type="aff" rid="aff4">
<sup>4</sup>
</xref>
<xref ref-type="corresp" rid="c001">&#x2a;</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Han</surname>
<given-names>Tongcheng</given-names>
</name>
<xref ref-type="aff" rid="aff3">
<sup>3</sup>
</xref>
</contrib>
</contrib-group>
<aff id="aff1">
<label>
<sup>1</sup>
</label>State Key Laboratory of Ore Deposit Geochemistry, Chinese Academy of Sciences, Institute of Geochemistry, <addr-line>Guiyang</addr-line>, <country>China</country>
</aff>
<aff id="aff2">
<label>
<sup>2</sup>
</label>University of Chinese Academy of Sciences, <addr-line>Beijing</addr-line>, <country>China</country>
</aff>
<aff id="aff3">
<label>
<sup>3</sup>
</label>Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), <addr-line>Qingdao</addr-line>, <country>China</country>
</aff>
<aff id="aff4">
<label>
<sup>4</sup>
</label>College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, <addr-line>Beijing</addr-line>, <country>China</country>
</aff>
<author-notes>
<fn fn-type="edited-by">
<p>
<bold>Edited and reviewed by:</bold> <ext-link ext-link-type="uri" xlink:href="https://loop.frontiersin.org/people/86442/overview">Frontiers in Earth Science Editorial Office</ext-link>, Frontiers Media SA, Switzerland</p>
</fn>
<corresp id="c001">&#x2a;Correspondence: Li-Yun Fu, <email>lfu@upc.edu.cn</email>; Ning Liu, <email>nicolaliu@buaa.edu.cn</email>
</corresp>
<fn fn-type="other">
<p>This article was submitted to Earth and Planetary Materials, a section of the journal Frontiers in Earth Science</p>
</fn>
</author-notes>
<pub-date pub-type="epub">
<day>06</day>
<month>10</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="collection">
<year>2021</year>
</pub-date>
<volume>9</volume>
<elocation-id>777904</elocation-id>
<history>
<date date-type="received">
<day>16</day>
<month>09</month>
<year>2021</year>
</date>
<date date-type="accepted">
<day>16</day>
<month>09</month>
<year>2021</year>
</date>
</history>
<permissions>
<copyright-statement>Copyright &#xa9; 2021 Xu, Fu, Liu and Han.</copyright-statement>
<copyright-year>2021</copyright-year>
<copyright-holder>Xu, Fu, Liu and Han</copyright-holder>
<license xlink:href="http://creativecommons.org/licenses/by/4.0/">
<p>This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these&#x20;terms.</p>
</license>
</permissions>
<related-article id="RA1" related-article-type="corrected-article" journal-id="Front Endocrinol (Lausanne)" journal-id-type="nlm-ta" xlink:href="10.3389/feart.2021.665275" ext-link-type="doi">A Corrigendum on <article-title>On the Determination of Coordination Numbers of Coupled DEM-DFN Model for Modeling Fractured Rocks</article-title> by Xu, X., Fu, L.-Y., Liu, N., and Han, T. (2021). Front. Earth Sci. 9:665275. doi: <object-id>10.3389/feart.2021.665275</object-id>
</related-article>
<kwd-group>
<kwd>numerical simulation</kwd>
<kwd>crack information inversion</kwd>
<kwd>coordination number</kwd>
<kwd>measurement window</kwd>
<kwd>DEM-DFN model</kwd>
</kwd-group>
</article-meta>
</front>
<body>
<p>In the published article, there was an error regarding the affiliations for Xiaoyi Xu. As well as having affiliation 1, they should also have 2 (University of Chinese Academy of Sciences, Beijing, China).</p>
<p>The authors apologize for this error and state that this does not change the scientific conclusions of the article in any way. The original article has been updated.</p>
</body>
<back>
<sec sec-type="disclaimer" id="s1">
<title>Publisher&#x2019;s Note</title>
<p>All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher.</p>
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</back>
</article>