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  <front>
    <journal-meta>
      <journal-id journal-id-type="issn">2411-3336</journal-id>
      <journal-id journal-id-type="eissn">2541-9404</journal-id>
      <journal-title-group>
        <journal-title xml:lang="ru">Записки Горного института</journal-title>
        <journal-title xml:lang="en">Journal of Mining Institute</journal-title>
      </journal-title-group>
      <publisher>
        <publisher-name xml:lang="ru">Санкт-Петербургский горный университет императрицы Екатерины ΙΙ</publisher-name>
        <publisher-name xml:lang="en">Empress Catherine II Saint Petersburg Mining University</publisher-name>
      </publisher>
    </journal-meta>
    <article-meta>
      <article-id custom-type="pmi" pub-id-type="custom">pmi-12948</article-id>
      <article-id pub-id-type="uri">https://pmi.spmi.ru/pmi/article/view/12948</article-id>
      <article-categories>
        <subj-group subj-group-type="section-heading" xml:lang="ru">
          <subject>Без раздела</subject>
        </subj-group>
        <subj-group subj-group-type="section-heading" xml:lang="en">
          <subject>Without section</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title xml:lang="en">Calculation of probable coal enrichment indices</article-title>
        <trans-title-group xml:lang="ru">
          <trans-title>Расчет вероятных показателей обогащения углей</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author" corresp="yes">
          <name name-style="eastern">
            <surname>Zvyagin</surname>
            <given-names>B. M.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Звягин</surname>
              <given-names>Б. М.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Zvyagin</surname>
              <given-names>B. M.</given-names>
            </name>
          </name-alternatives>
          <email>pmi@spmi.ru</email>
          <xref ref-type="aff" rid="aff1"/>
        </contrib>
        <aff-alternatives id="aff1">
          <aff>
            <institution xml:lang="ru"/>
          </aff>
          <aff>
            <institution xml:lang="en"/>
          </aff>
        </aff-alternatives>
      </contrib-group>
      <pub-date pub-type="epub" iso-8601-date="1961-09-04">
        <day>04</day>
        <month>09</month>
        <year>1961</year>
      </pub-date>
      <pub-date date-type="collection">
        <year>1961</year>
      </pub-date>
      <volume>37</volume>
      <issue>3</issue>
      <fpage>64</fpage>
      <lpage>74</lpage>
      <history>
        <date date-type="received" iso-8601-date="1960-09-28">
          <day>28</day>
          <month>09</month>
          <year>1960</year>
        </date>
        <date date-type="accepted" iso-8601-date="1960-11-16">
          <day>16</day>
          <month>11</month>
          <year>1960</year>
        </date>
        <date date-type="rev-recd" iso-8601-date="1961-09-04">
          <day>04</day>
          <month>09</month>
          <year>1961</year>
        </date>
      </history>
      <permissions>
        <copyright-statement xml:lang="ru">© 1961 Б. М. Звягин</copyright-statement>
        <copyright-statement xml:lang="en">© 1961 B. M. Zvyagin</copyright-statement>
        <copyright-year>1961</copyright-year>
        <copyright-holder xml:lang="ru">Б. М. Звягин</copyright-holder>
        <copyright-holder xml:lang="en">B. M. Zvyagin</copyright-holder>
        <license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/4.0" xml:lang="ru">
          <license-p>Эта статья доступна по лицензии Creative Commons Attribution 4.0 International (CC BY 4.0)</license-p>
        </license>
        <license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/4.0" xml:lang="en">
          <license-p>This article is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0)</license-p>
        </license>
      </permissions>
      <self-uri xlink:type="simple" xlink:href="https://pmi.spmi.ru/pmi/article/view/12948">https://pmi.spmi.ru/pmi/article/view/12948</self-uri>
      <abstract xml:lang="ru">
        <p>Параметры, определяющие результаты гравитационного обога­щения мелкораздробленных углей. Раскрытие минералов, выходы и со­ставы фракций, качество полученного концентрата зависят от степени дробления. Чем мельче дробится уголь, тем больше раскрытие минера­лов при дроблении, тем в большем количестве из угля выделяются пирит и минеральные примеси (или богатые ими сростки), тем лучше качество угля, полученного при гравитационном обогащении раздроб­ленной массы.</p>
      </abstract>
      <abstract xml:lang="en">
        <p>Parameters determining the results of gravity concentration of finely crushed coals. Disclosure of minerals, yields and compositions of fractions, quality of the obtained concentrate depend on the degree of crushing. The finer the coal is crushed, the greater the disclosure of minerals during crushing, the greater the amount of pyrite and mineral impurities (or rich in their aggregates) are extracted from the coal, the better the quality of coal obtained by gravity concentration of the crushed mass.</p>
      </abstract>
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    <ref-list>
      <ref id="ref1">
        <label>1</label>
        <mixed-citation xml:lang="ru">Звягин Б. М. Общая теория и методы расчета результатов дробления горных пород и их последующего гравитационного обогащения. Записки ЛГИ, 1958, т. XXXVI, выл. 3.</mixed-citation>
        <mixed-citation xml:lang="en">Zvyagin B. M. General theory and methods of calculating the results of crushing rocks and their subsequent gravity concentration. Journal of Mining Institute, 1958, vol. XXXVI, iss. 3.</mixed-citation>
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        <mixed-citation xml:lang="en">Zvyagin B. M. Theory and methods of calculation of mineral disclosure at crushing and gravitational enrichment of coals. Cand. dissertation. Funds of the IME of the AS USSR, 1955.</mixed-citation>
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