<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE root>
<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">RUDN Journal of Engineering Research</journal-id><journal-title-group><journal-title xml:lang="en">RUDN Journal of Engineering Research</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник Российского университета дружбы народов. Серия: Инженерные исследования</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2312-8143</issn><issn publication-format="electronic">2312-8151</issn><publisher><publisher-name xml:lang="en">Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">5247</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">About the possibility of using reflected waves for detection of karst cavities</article-title><trans-title-group xml:lang="ru"><trans-title>Использование отраженной волны для обнаружения карстовых полостей</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Makarovsky</surname><given-names>O V</given-names></name><name xml:lang="ru"><surname>Макаровский</surname><given-names>О В</given-names></name></name-alternatives><bio xml:lang="en">Инженерный факультет; Российский университет дружбы народов; Peoples' Frendship University of Russia</bio><bio xml:lang="ru">Инженерный факультет; Российский университет дружбы народов</bio><email>-</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Peoples' Frendship University of Russia</institution></aff><aff><institution xml:lang="ru">Российский университет дружбы народов</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2009-01-15" publication-format="electronic"><day>15</day><month>01</month><year>2009</year></pub-date><issue>1</issue><issue-title xml:lang="en">NO1 (2009)</issue-title><issue-title xml:lang="ru">№1 (2009)</issue-title><fpage>99</fpage><lpage>102</lpage><history><date date-type="received" iso-8601-date="2016-09-07"><day>07</day><month>09</month><year>2016</year></date></history><permissions><copyright-statement xml:lang="ru">Copyright ©; 2009, Макаровский О.В.</copyright-statement><copyright-year>2009</copyright-year><copyright-holder xml:lang="ru">Макаровский О.В.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/engineering-researches/article/view/5247">https://journals.rudn.ru/engineering-researches/article/view/5247</self-uri><abstract xml:lang="en">Accidents with buildings in Moscow above karst cavities created caused nessesity to detect them with the help of geophysics. The dynamic and kinematic anomalies  were simulated and surveyed with the method of photoplastic on the interval of reflection wave's T-D curves. These anomalies were situated in the shadow zone above the karst cavities and created by refraction (enveloping) and diffraction. Wave's T-D curves were built and the complying composite of coupling of diameter cavities and the depth of it's orientation with the time delay of T-D curves and changing of wave's amplitude in the shadow zone. The compositing of this coupling is that if the cavities diameter enlarges, the effect of refraction increases, but the effect of diffraction (enveloping) decreases.
            </abstract><trans-abstract xml:lang="ru">Аварии сооружений в Москве над карстовыми полостями вызвали необходимость обнаруживать их с помощью геофизики. Методом фотоупругости моделировались и изучались динамические и кинематические аномалии на участках годографов отраженной волны в зоны тени над полостью, вызванные рефракцией и дифракцией. Построены годографы волны, изучен сложный характер связи диаметра полости и глубины ее положения с запаздыванием годографа и изменении ем амплитуды волны в зоне тени. Сложность этой связи вызвана тем,  что преувеличении диаметра полости вклад рефракции растет, а вклад дифракции падает.
            </trans-abstract></article-meta></front><body></body><back><ref-list/></back></article>
