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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">gscience</journal-id><journal-title-group><journal-title xml:lang="en">Mining Science and Technology (Russia)</journal-title><trans-title-group xml:lang="ru"><trans-title>Горные науки и технологии</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2500-0632</issn><publisher><publisher-name>The National University of Science and Technology MISiIS (NUST MISIS)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17073/2500-0632-2019-4-251-261</article-id><article-id custom-type="elpub" pub-id-type="custom">gscience-171</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MINING ROCK PROPERTIES. ROCK MECHANICS AND GEOPHYSICS</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>СВОЙСТВА ГОРНЫХ ПОРОД. ГЕОМЕХАНИКА И ГЕОФИЗИКА</subject></subj-group></article-categories><title-group><article-title>Study of Rock Mass Stability Decrease due to Underground Mining</article-title><trans-title-group xml:lang="ru"><trans-title>Исследование ослабленности массива пород при подземной добыче руд</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><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><bio xml:lang="ru"><p>Владикавказ</p></bio><bio xml:lang="en"><p>Vladikavkaz</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Масленников</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Maslennikov</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Шахты</p></bio><bio xml:lang="en"><p>Shakhty</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Нуньес Родригес</surname><given-names>Альберто Мартин</given-names></name><name name-style="western" xml:lang="en"><surname>Nunez Rodriguez</surname><given-names>Alberto Martin</given-names></name></name-alternatives><bio xml:lang="ru"><p>Восточный Сибао</p></bio><bio xml:lang="en"><p>East Sibao</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Анищенко</surname><given-names>В. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Anischenko</surname><given-names>V. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Нью-Йорк</p></bio><bio xml:lang="en"><p>New York</p></bio><xref ref-type="aff" rid="aff-4"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Северо-Кавказский горно-металлургический институт<country>Россия</country></aff><aff xml:lang="en">North-Caucasian Mining and Metallurgical Institute<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">Донской государственный технический университет (филиал)<country>Россия</country></aff><aff xml:lang="en">Don State Technical University<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru">Технический университет<country>Доминиканская Республика</country></aff><aff xml:lang="en">Technical University<country>Dominican Republic</country></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru">LLC "Spetsmodulproekt"<country>Соединённые Штаты Америки</country></aff><aff xml:lang="en">LLC "Spetsmodulproekt"<country>United States</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>30</day><month>01</month><year>2020</year></pub-date><volume>4</volume><issue>4</issue><fpage>251</fpage><lpage>261</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Golik V.I., Maslennikov S.A., Nunez Rodriguez A.M., Anischenko V.I., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Голик В.И., Масленников С.А., Нуньес Родригес А.М., Анищенко В.И.</copyright-holder><copyright-holder xml:lang="en">Golik V.I., Maslennikov S.A., Nunez Rodriguez A.M., Anischenko V.I.</copyright-holder><license license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://mst.misis.ru/jour/article/view/171">https://mst.misis.ru/jour/article/view/171</self-uri><abstract><p>The optimization of underground mining processes is carried out based on rational use of energy for obtaining preset broken ore size. The effective optimization requires correct assessment of the properties of the rock mass to be broken. Energy management requires assessment of rock mass stability decrease due to impact of natural and technogenic stresses. To make adjustments to the general energy management model, information on the rock mass structure is required to be obtained by geophysical methods. To optimize broken rock/ore size (to minimize oversized or excessively crushed mineral fraction yield during breaking), blasting energy application should be regulated and smart. The study is aimed at assessing the effectiveness of using geophysical methods for the prompt and correct assessment of rock and backfill mass condition during underground mining of mineral deposits. Decreasing stability of rock masses is assessed using the method of electrometric surveys in noncore exploratory boreholes. Rock mass stability study allowed revealing correlation and dependencies between the studied parameters. Effectiveness of using geophysical methods for differentiating natural and technogenic masses by degree of decreasing their stability due to geological and technogenic stresses. To determine the coefficient of decreasing rock mass stability based on rock apparent resistivity data, electrometric logging was used. This allowed to differentiate rock mass by the degree of decreasing rock mass stability based on the revealed dependency. The features of the geophysical survey components are described in details. The methodology and findings of the underground electric sounding using a sequential gradient electrode system at specific metal deposit are presented, including using theoretical curves and determining rock conductivity and the distance to workings. Besides, correctness of the geophysical method findings was assessed differentially. The assessment was prepared for decreasing rock mass stability based on electrometric logging data, and for advance outlining heterogeneity zones in rock masses by electric sounding along working walls. Based on findings of the conducted experimental work on revealing structural boundaries within rock mass, the method of electric sounding along working walls was recommended for application in practice. As for the studied borehole electric sounding application, the convergence of the experimental and theoretical curves is insufficient to recommend the method for practical application.</p></abstract><trans-abstract xml:lang="ru"><p>Оптимизация процессов подземной разработки месторождений осуществляется за счет рационального использования энергии для получения заданной крупности руд. Ее успех зависит от учета свойств разрушаемой среды. Важную роль в управлении энергией играет ослабленность пород природными и техногенными силовыми полями. Для внесения коррективов в общую модель управления энергией нужны сведения о строении массива, получаемые геофизическими методами. Поскольку для уменьшения выхода негабаритных или излишне измельченных фракций минералов в процессе отбойки используют регулирование затрат энергии взрыва на степень разупрочнения пород, целью исследования является определение эффективности использования геофизических методов для оперативной и корректной оценки состояния породных и закладочных массивов при подземной разработке месторождений твердых полезных ископаемых. Ослабленность массивов пород оценивается методом электрометрических исследований в бескерновых разведочных скважинах. Сопоставлением данных о степени ослабленности установлено наличие корреляционной связи между участвующими параметрами, что позволяет выразить зависимость между ними. Дана оценка эффективности использования геофизических методов для дифференциации природных и искусственных массивов по ослабленности геологическими и технологическими силовыми полями. Для определения коэффициента ослабления по кажущемуся сопротивлению пород использованы материалы электрометрического каротажа. На основе выявленной зависимости породный массив дифференцирован по степени ослабленности пород. Дифференцированы и детализированы особенности составляющих комплекса геофизических методов исследований. Приведены методология и результаты подземного электрозондирования последовательной градиент-установкой с помощью теоретических кривых на конкретном металлическом месторождении с определением проводимости пород и расстояния до выработки. Дифференцированно дана оценка корректности геофизических методов: ослабленности пород электрометрическим каротажем скважин, а опережающее оконтуривание зон неоднородностей в массивах месторождений – электрозондированием вдоль стенок выработок. На основании проведенных опытных работ по выявлению структурных границ в массиве метод электрозондирования вдоль стенок выработок рекомендован для практического применения. При использовании скважинного электрозондирования сходимость экспериментальных кривых с теоретическими недостаточна.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>разработка месторождения</kwd><kwd>порода</kwd><kwd>ослабленность</kwd><kwd>геофизические методы</kwd><kwd>электрометрия</kwd><kwd>электрозондирование</kwd></kwd-group><kwd-group xml:lang="en"><kwd>deposit development</kwd><kwd>rock</kwd><kwd>decreasing stability</kwd><kwd>geophysical methods</kwd><kwd>electrometry</kwd><kwd>resistivity sounding</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Goodarzi A., Oraee-Mirzamani N. Assessment of the Dynamic Loads Effect on Underground Mines Supports. 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