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    <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 pub-id-type="doi">10.31897/PMI.2021.5.2</article-id>
      <article-id custom-type="pmi" pub-id-type="custom">pmi-15548</article-id>
      <article-id pub-id-type="uri">https://pmi.spmi.ru/pmi/article/view/15548</article-id>
      <article-categories>
        <subj-group subj-group-type="section-heading" xml:lang="ru">
          <subject>Геотехнология и инженерная геология</subject>
        </subj-group>
        <subj-group subj-group-type="section-heading" xml:lang="en">
          <subject>Geotechnical Engineering and Engineering Geology</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title xml:lang="en">Prediction of the stress state of the shotcreting support  under repeated seismic load</article-title>
        <trans-title-group xml:lang="ru">
          <trans-title>Прогноз напряженного состояния набрызг-бетонной крепи  при многократном сейсмическом воздействии</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Karasev</surname>
            <given-names>Maksim A.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Карасев</surname>
              <given-names>М. А.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Karasev</surname>
              <given-names>Maksim A.</given-names>
            </name>
          </name-alternatives>
          <email>Karasev_MA@pers.spmi.ru</email>
          <contrib-id contrib-id-type="orcid">0000-0001-8939-0807</contrib-id>
          <xref ref-type="aff" rid="aff1"/>
        </contrib>
        <aff-alternatives id="aff1">
          <aff>
            <institution xml:lang="ru">Санкт-Петербургский горный университет (Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">Saint Petersburg Mining University (Russia)</institution>
          </aff>
        </aff-alternatives>
        <contrib contrib-type="author" corresp="yes">
          <name name-style="eastern">
            <surname>Sotnikov</surname>
            <given-names>Roman O.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Сотников</surname>
              <given-names>Р. О.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Sotnikov</surname>
              <given-names>Roman O.</given-names>
            </name>
          </name-alternatives>
          <email>ross61@mail.ru</email>
          <contrib-id contrib-id-type="orcid">0000-0002-7254-6534</contrib-id>
          <xref ref-type="aff" rid="aff2"/>
        </contrib>
        <aff-alternatives id="aff2">
          <aff>
            <institution xml:lang="ru">Санкт-Петербургский горный университет (Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">Saint Petersburg Mining University (Russia)</institution>
          </aff>
        </aff-alternatives>
      </contrib-group>
      <pub-date pub-type="epub" iso-8601-date="2021-12-16">
        <day>16</day>
        <month>12</month>
        <year>2021</year>
      </pub-date>
      <pub-date date-type="collection">
        <year>2021</year>
      </pub-date>
      <volume>251</volume>
      <fpage>626</fpage>
      <lpage>638</lpage>
      <history>
        <date date-type="received" iso-8601-date="2021-07-13">
          <day>13</day>
          <month>07</month>
          <year>2021</year>
        </date>
        <date date-type="accepted" iso-8601-date="2021-10-18">
          <day>18</day>
          <month>10</month>
          <year>2021</year>
        </date>
        <date date-type="rev-recd" iso-8601-date="2021-12-16">
          <day>16</day>
          <month>12</month>
          <year>2021</year>
        </date>
      </history>
      <permissions>
        <copyright-statement xml:lang="ru">© 2021 М. А. Карасев, Р. О. Сотников</copyright-statement>
        <copyright-statement xml:lang="en">© 2021 Maksim A. Karasev, Roman O. Sotnikov</copyright-statement>
        <copyright-year>2021</copyright-year>
        <copyright-holder xml:lang="ru">М. А. Карасев, Р. О. Сотников</copyright-holder>
        <copyright-holder xml:lang="en">Maksim A. Karasev, Roman O. Sotnikov</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/15548">https://pmi.spmi.ru/pmi/article/view/15548</self-uri>
      <abstract xml:lang="ru">
        <p>В статье оценивается влияние повторяющихся взрывов на напряженно-деформированное состояние набрызг-бетонной крепи, которое негативно сказывается на несущей способности крепи и может привести к формированию локальных вывалов пород в местах значительной деградации прочности набрызг-бетона. Несмотря на то, что однократное сейсмическое воздействие обычно не оказывает значительного влияния на техническое состояние набрызг-бетонной крепи, многократное динамическое нагружение может привести к развитию негативных процессов и повлиять на безопасность людей. В качестве набрызг-бетонной крепи рассмотрен неармированный и дисперсно-армированный набрызг-бетон. Изучены модели деформирования горной породы и набрызг-бетонной крепи. Для описания модели деформирования породного массива принята упругопластическая модель, основанная на условии пластичности Хука – Брауна, которая достаточно точно описывает упругопластическое поведение трещиноватой среды. При выполнении прогноза напряженно-деформированного состояния набрызг-бетонной крепи принята модель пластического деформирования бетона с накоплением повреждений Concrete Damage Plasticity (CDP), которая позволяет комплексно рассмотреть процесс деформирования бетона как при условиях одноосного сжатия и растяжения, так и при незначительном боковом обжатии. На первом расчетном этапе выполнен прогноз распространения сейсмических волн в непосредственной близости от участка инициации взрывчатого вещества. На втором этапе выполнены прогнозы распространения сейсмических волн до горной выработки и напряженно-деформированного состояния крепи. На основании выполненных исследований предложена методика оценки воздействия повторяющихся взрывов на напряженно-деформированное состояние набрызг-бетонной крепи горной выработки.</p>
      </abstract>
      <abstract xml:lang="en">
        <p>The article assesses the impact of repeated blasts on the stress-strain state of the shotcreting support, which negatively affects the bearing capacity of the support and can lead to the formation of local rock falls in places of significant degradation of the shotcreting strength. Despite the fact that a single seismic load usually does not have a significant impact on the technical condition of the shotcreting support, repeated dynamic loading can lead to the development of negative processes and affect the safety. The article considers unreinforced and dispersed-reinforced shotcreting concrete as a shotcreting support. Models of deformation of rock and shotcreting support have been studied. To describe the deformation model of a rock mass, an elastic–plastic model based on the Hook-Brown plasticity condition has been accepted, which accurately describes the elastic-plastic behavior of a fractured medium. When performing the prediction of the stress-strain state of the shotcreting support, a model of plastic deformation of concrete with the accumulation of Concrete Damage Plasticity (CDP) was adopted, which allows to comprehensively consider the process of concrete deformation both under conditions of uniaxial compression and stress, and with minor edging draft. At the first calculation stage, a forecast of the seismic waves propagation in the immediate vicinity of the explosive initiation site was made. At the second stage, forecasts of the seismic waves propagation to the mine working and the stress-strain state of the support were made. On the basis of the performed studies, a methodology for assessing the impact of repeated blasts on the stress-strain state of the shotcreting support of the mine working is proposed.</p>
      </abstract>
      <kwd-group xml:lang="ru">
        <title>Ключевые слова</title>
        <kwd>горная выработка</kwd>
        <kwd>породный массив</kwd>
        <kwd>массовый взрыв</kwd>
        <kwd>сейсмические волны</kwd>
        <kwd>повреждение</kwd>
        <kwd>набрызг-бетон</kwd>
        <kwd>численное моделирование</kwd>
      </kwd-group>
      <kwd-group xml:lang="en">
        <title>Keywords</title>
        <kwd>mine working</kwd>
        <kwd>rock mass</kwd>
        <kwd>large-scale blast</kwd>
        <kwd>seismic waves</kwd>
        <kwd>damage</kwd>
        <kwd>shotcreting</kwd>
        <kwd>numerical modeling</kwd>
      </kwd-group>
    </article-meta>
  </front>
  <body/>
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