<?xml version="1.0" encoding="UTF-8"?>
<article xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:mml="http://www.w3.org/1998/Math/MathML" dtd-version="1.4" article-type="research-article">
  <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-12846</article-id>
      <article-id pub-id-type="uri">https://pmi.spmi.ru/pmi/article/view/12846</article-id>
      <article-categories>
        <subj-group subj-group-type="section-heading" xml:lang="ru">
          <subject>Горное дело</subject>
        </subj-group>
        <subj-group subj-group-type="section-heading" xml:lang="en">
          <subject>Mining</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title xml:lang="en">Investigation of compactness of free unsubmerged jets</article-title>
        <trans-title-group xml:lang="ru">
          <trans-title>Исследование компактности свободных незатопленных струи</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author" corresp="yes">
          <name name-style="eastern">
            <surname>Gerontev</surname>
            <given-names>V. I.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Геронтьев</surname>
              <given-names>В. И.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Gerontev</surname>
              <given-names>V. I.</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 contrib-type="author">
          <name name-style="eastern">
            <surname>Kolchanov</surname>
            <given-names>V. D.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Колчанов</surname>
              <given-names>В. Д.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Kolchanov</surname>
              <given-names>V. D.</given-names>
            </name>
          </name-alternatives>
          <email>pmi@spmi.ru</email>
          <xref ref-type="aff" rid="aff2"/>
        </contrib>
        <aff-alternatives id="aff2">
          <aff>
            <institution xml:lang="ru"/>
          </aff>
          <aff>
            <institution xml:lang="en"/>
          </aff>
        </aff-alternatives>
      </contrib-group>
      <pub-date pub-type="epub" iso-8601-date="1959-07-29">
        <day>29</day>
        <month>07</month>
        <year>1959</year>
      </pub-date>
      <pub-date date-type="collection">
        <year>1959</year>
      </pub-date>
      <volume>41</volume>
      <issue>1</issue>
      <fpage>76</fpage>
      <lpage>80</lpage>
      <history>
        <date date-type="received" iso-8601-date="1958-07-08">
          <day>08</day>
          <month>07</month>
          <year>1958</year>
        </date>
        <date date-type="accepted" iso-8601-date="1958-09-23">
          <day>23</day>
          <month>09</month>
          <year>1958</year>
        </date>
        <date date-type="rev-recd" iso-8601-date="1959-07-29">
          <day>29</day>
          <month>07</month>
          <year>1959</year>
        </date>
      </history>
      <permissions>
        <copyright-statement xml:lang="ru">© 1959 В. И. Геронтьев, В. Д. Колчанов</copyright-statement>
        <copyright-statement xml:lang="en">© 1959 V. I. Gerontev, V. D. Kolchanov</copyright-statement>
        <copyright-year>1959</copyright-year>
        <copyright-holder xml:lang="ru">В. И. Геронтьев, В. Д. Колчанов</copyright-holder>
        <copyright-holder xml:lang="en">V. I. Gerontev, V. D. Kolchanov</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/12846">https://pmi.spmi.ru/pmi/article/view/12846</self-uri>
      <abstract xml:lang="ru">
        <p>При разрушении горных пород струей воды поток за счет потен­циальной энергии давления в гидромониторе по выходе из насадка приобретает кинетическую энергию и, свободно взаимодействуя с воз­духом, постепенно аэрируется, что и приводит к рассеиванию струи. Так как эффективность процесса разрушения в значительной степени зависит от компактности струи, исследование компактности и факто­ров, ее определяющих, представляет практический интерес.</p>
      </abstract>
      <abstract xml:lang="en">
        <p>When breaking rocks with a water jet, the flow due to the potential energy of pressure in the hydromonitor at the exit of the nozzle acquires kinetic energy and, freely interacting with air, is gradually aerated, which leads to the dispersion of the jet. Since the efficiency of the destruction process depends to a large extent on the compactness of the jet, the study of compactness and factors determining it is of practical interest.</p>
      </abstract>
    </article-meta>
  </front>
  <body/>
  <back>
    <ref-list>
      <ref id="ref1">
        <label>1</label>
        <mixed-citation xml:lang="ru">Веселов Г. М., Зеленин А. Н., Кокошин Ю. Г, Шарымов В. С. Результаты основной скорости для разрушения горных пород. Горные машины. Сб. № 2, Углетехиздат, 1958.</mixed-citation>
        <mixed-citation xml:lang="en">Veselov G. M., Zelenin A. N., Kokoshin Yu. G, Sharymov V. S. Results of the basic velocity for rock destruction. Mining machines. Coll. No. 2, Ugletekhizdat, 1958.</mixed-citation>
      </ref>
      <ref id="ref2">
        <label>2</label>
        <mixed-citation xml:lang="ru">Oguey Р., Mamin М., Baatard С. Bull techn. Suisse romande, 1951, № 4, p. 37—47; № 5, p. 53-64.</mixed-citation>
        <mixed-citation xml:lang="en">Oguey R., Mamin M., Baatard S. Bull Techn. Suisse romandie, 1951, No. 4, p. 37-47; No. 5, pp. 53-64.</mixed-citation>
      </ref>
    </ref-list>
  </back>
</article>
