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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 pub-id-type="doi">10.31897/pmi.2019.5.497</article-id>
      <article-id custom-type="pmi" pub-id-type="custom">pmi-13227</article-id>
      <article-id pub-id-type="uri">https://pmi.spmi.ru/pmi/article/view/13227</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">Ensuring Stability of Undermining Inclined Drainage Holes During Intensive Development of Multiple Gas-Bearing Coal Layers</article-title>
        <trans-title-group xml:lang="ru">
          <trans-title>Обеспечение устойчивости подрабатываемых наклонных дегазационных скважин при интенсивной разработке свит газоносных угольных пластов</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author" corresp="yes">
          <name name-style="eastern">
            <surname>Brigida</surname>
            <given-names>V. S.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Бригида</surname>
              <given-names>В. С.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Brigida</surname>
              <given-names>V. S.</given-names>
            </name>
          </name-alternatives>
          <email>1z011@inbox.ru</email>
          <xref ref-type="aff" rid="aff1"/>
        </contrib>
        <aff-alternatives id="aff1">
          <aff>
            <institution xml:lang="ru">Сочинский научно-исследовательский центр РАН (Сочи, Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">Sochi Research Center of the Russian Academy Sciences (Sochi, Russia)</institution>
          </aff>
        </aff-alternatives>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Golik</surname>
            <given-names>V. I.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Голик</surname>
              <given-names>В. И.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Golik</surname>
              <given-names>V. I.</given-names>
            </name>
          </name-alternatives>
          <email>v.i.golik@mail.ru</email>
          <xref ref-type="aff" rid="aff2"/>
        </contrib>
        <aff-alternatives id="aff2">
          <aff>
            <institution xml:lang="ru">Северо-Кавказский горно-металлургический институт (государственный технологический университет) (Владикавказ, Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">North Caucasian Institute of Mining and Metallurgy (Vladikavkaz, Russia)</institution>
          </aff>
        </aff-alternatives>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Dmitrak</surname>
            <given-names>Yu. V.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Дмитрак</surname>
              <given-names>Ю. В.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Dmitrak</surname>
              <given-names>Yu. V.</given-names>
            </name>
          </name-alternatives>
          <email>rector@skgmi-gtu.ru</email>
          <xref ref-type="aff" rid="aff3"/>
        </contrib>
        <aff-alternatives id="aff3">
          <aff>
            <institution xml:lang="ru">Северо-Кавказский горно-металлургический институт (государственный технологический университет) (Владикавказ, Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">North Caucasian Institute of Mining and Metallurgy (Vladikavkaz, Russia)</institution>
          </aff>
        </aff-alternatives>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Gabaraev</surname>
            <given-names>O. Z.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Габараев</surname>
              <given-names>О. З.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Gabaraev</surname>
              <given-names>O. Z.</given-names>
            </name>
          </name-alternatives>
          <email>gabaraev59@mail.ru</email>
          <xref ref-type="aff" rid="aff4"/>
        </contrib>
        <aff-alternatives id="aff4">
          <aff>
            <institution xml:lang="ru">Северо-Кавказский горно-металлургический институт (государственный технологический университет) (Владикавказ, Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">North Caucasian Institute of Mining and Metallurgy (Vladikavkaz, Russia)</institution>
          </aff>
        </aff-alternatives>
      </contrib-group>
      <pub-date pub-type="epub" iso-8601-date="2019-10-23">
        <day>23</day>
        <month>10</month>
        <year>2019</year>
      </pub-date>
      <pub-date date-type="collection">
        <year>2019</year>
      </pub-date>
      <volume>239</volume>
      <fpage>497</fpage>
      <lpage>501</lpage>
      <history>
        <date date-type="received" iso-8601-date="2019-05-26">
          <day>26</day>
          <month>05</month>
          <year>2019</year>
        </date>
        <date date-type="accepted" iso-8601-date="2019-07-23">
          <day>23</day>
          <month>07</month>
          <year>2019</year>
        </date>
        <date date-type="rev-recd" iso-8601-date="2019-10-23">
          <day>23</day>
          <month>10</month>
          <year>2019</year>
        </date>
      </history>
      <permissions>
        <copyright-statement>© V. S. Brigida, V. I. Golik, Yu. V. Dmitrak, O. Z. Gabaraev</copyright-statement>
        <copyright-year>2019</copyright-year>
        <copyright-holder xml:lang="ru">В. С. Бригида, В. И. Голик, Ю. В. Дмитрак, О. З. Габараев</copyright-holder>
        <copyright-holder xml:lang="en">V. S. Brigida, V. I. Golik, Yu. V. Dmitrak, O. Z. Gabaraev</copyright-holder>
        <license xlink:href="http://creativecommons.org/licenses/by/4.0">
          <license-p>CC BY 4.0</license-p>
        </license>
      </permissions>
      <self-uri xlink:type="simple" xlink:href="https://pmi.spmi.ru/pmi/article/view/13227">https://pmi.spmi.ru/pmi/article/view/13227</self-uri>
      <abstract xml:lang="ru">
        <p>При больших скоростях подвигания линии очистного забоя повышаются требования к надежности работы подрабатываемых дегазационных скважин. Проблемным является вопрос обеспечения интенсивности отработки газоносных пластов в условиях роста природной газоносности, глубины разработки и производительности очистного оборудования. Наибольшую угрозу представляет потеря устойчивости скважин в зоне влияния опорного давления (перед лавой) и области интенсивных сдвижений зависающих породных консолей (позади лавы). Интенсификация подсосов воздуха вследствие деформирования канала ствола скважины приводит к обеднению отводимой метановоздушной смеси и росту рисков нарушения безопасного аэрогазового режима выемочного участка. Описан механизм влияния очистной выемки на состояние подземных скважин и образование зависающих породных консолей. Приведена типизация основных видов деформаций сечения скважин. Указаны критические недостатки наиболее применяемых технологических схем отработки газоносных пластов с высокими нагрузками на очистные забои, что не позволяет обеспечить нормальную работу дегазационной системы. В результате исследований уточнена зависимость влияния числа шпуров, а также расстояния между осями шпуров и скважиной на напряженное состояние контура скважины. Исходя из этого предложена формула для расчета параметров бурения системы разгрузочных шпуров. Внедрение данных мероприятий позволит увеличить эффективность подземной дегазации и обеспечить рост интенсивности отработки газоносных угольных пластов.</p>
      </abstract>
      <abstract xml:lang="en">
        <p>At high rates of production face advance, requirements towards reliable operation of undermining drainage holes get raised. The issue of maintaining high intensity of gaseous seams development under naturally increasing gas content, mining depth and capacity of production equipment poses a problem. The greatest threat comes from the loss of hole stability in the bearing pressure affected zone (in front of the face) and in the intensive shift area of overhanging rock corbels (behind the face). Intensification of air leaks due to deformation of borehole channel leads to impoverishment of removed methane-air mixture and an increasing risk to disturb safe aerogas regime in the mining area. The paper describes a mechanism of how coal-face operations affect the state of underground holes and formation of overhanging rock corbels. A typification of basic kinds of borehole deformations is presented. Authors point out critical disadvantages of the most widely-used technological schemes of gaseous seams development under high load on the production face, which hinder normal operation of a gas drainage system. As a result of research, a dependency of shot hole number, as well as the distance between shot hole axes and the borehole, on the stress state of the borehole outline has been defined more precisely. Basing on that, a formula to calculate drilling parameters of the discharge hole system has been suggested. Implementation of these measures will allow to increase the efficiency of underground gas drainage and to maintain growing intensity of gaseous coal seam development.</p>
      </abstract>
      <kwd-group xml:lang="ru">
        <title>Ключевые слова</title>
        <kwd>подземные  скважины</kwd>
        <kwd>устойчивость</kwd>
        <kwd>интенсификация  добычи  угля</kwd>
        <kwd>разгрузочные шпуры</kwd>
        <kwd>снижение метанообильности выемочного участка</kwd>
      </kwd-group>
      <kwd-group xml:lang="en">
        <title>Keywords</title>
        <kwd>underground holes</kwd>
        <kwd>stability</kwd>
        <kwd>intensification of coal extraction</kwd>
        <kwd>discharge shot holes</kwd>
        <kwd>decreasing methane content in the extraction block</kwd>
      </kwd-group>
    </article-meta>
  </front>
  <body/>
  <back>
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