2411-3336 2541-9404 Записки Горного института Journal of Mining Institute Санкт-Петербургский горный университет императрицы Екатерины ΙΙ Empress Catherine II Saint Petersburg Mining University 10.31897/PMI.2020.6.2 pmi-13384 https://pmi.spmi.ru/pmi/article/view/13384 Горное дело Mining Technological aspects of cased wells construction with cyclical-flow transportation of rock Технологические аспекты проходки обсаженных скважин с циклично-поточным транспортированием керна Kondratenko Andrei S. Кондратенко А. С. Kondratenko Andrei S. kondratenko@misd.ru Институт горного дела им. Н.А.Чинакала Сибирского отделения Российской академии наук (Новосибирск, Россия) N.A.Chinakal Institute of Mining of the Siberian Branch of the Russian Academy of Sciences (Novosibirsk, Russia) 29 12 2020 2020 246 610 616 25 05 2020 11 06 2020 29 12 2020 © Andrei S. Kondratenko 2020 А. С. Кондратенко Andrei S. Kondratenko CC BY 4.0 https://pmi.spmi.ru/pmi/article/view/13384

Предложена высокопроизводительная технология бурения обсаженных скважин, сущность которой заключается в опережающем погружении обсадной трубы в массив осадочных горных пород и циклично-поточном транспортированием порций грунтового керна с помощью давления сжатого воздуха, подводимого к открытому забойному торцу трубы по отдельной магистрали. Рассмотрены результаты математического моделирования методом конечных элементов в программном комплексе ANSYS Mechanical процесса ударного погружения полой трубы в грунтовый массив в горизонтальной и вертикальной постановках для реализации технологии. Определены параметры погружения трубы в массив осадочных горных пород – величина шага очистки и энергия удара, необходимая для погружения трубы на заданную глубину. Расчеты выполнялись для труб диаметром от 325 до 730 мм. Введен коэффициент погружения, характеризующий сопротивление горных пород разрушению при динамическом внедрении обсадной трубы за один удар пневмомолота. Представлен обзор перспектив применения предлагаемой технологии в геологоразведке, при проведении горизонтальных выработок малого сечения бестраншейным способом в строительстве и скважинных способах добычи полезных ископаемых. Предложен вариант применения технологии для определения прочностных свойств горных пород. Рассмотрены некоторые особенности применения технологии на промышленных объектах строительной и горной отрасли: для бестраншейной прокладки подземных коммуникаций и для установки стартовых кондукторов при бурении с поверхности дегазационных скважин на угольных месторождениях. Представлены результаты технико-экономической оценки эффективности предлагаемой технологии при установке стартовых кондукторов в осадочных породах на горных отводах угольных шахт.

A high-performance technology for constructing cased wells is proposed. Essence of the technology is the advance insertion of the casing pipe into the sedimentary rock mass and the cyclical-flow transportation of the soil rock portions using the compressed air pressure supplied to the open bottomhole end of the pipe through a separate line. Results of mathematical modeling for the process of impact insertion of a hollow pipe into a soil mass in horizontal and vertical settings are considered. Modeling of the technology is implemented by the finite element method in the ANSYS Mechanical software. Parameters of the pipe insertion in the sedimentary rock mass are determined - value of the cleaning step and the impact energy required to insert the pipe at a given depth. Calculations were performed for pipes with a diameter from 325 to 730 mm. Insertion coefficient is introduced, which characterizes the resistance of rocks to destruction during the dynamic penetration of the casing pipe in one impact blow of the pneumatic hammer. An overview of the prospects for the application of the proposed technology in geological exploration, when conducting horizontal wells of a small cross-section using a trenchless method of construction and borehole methods of mining, is presented. A variant of using the technology for determining the strength properties of rocks is proposed. Some features of the technology application at industrial facilities of the construction and mining industry are considered: for trenchless laying of underground utilities and for installing starting conductors when constructing degassing wells from the surface in coal deposits. Results of a technical and economic assessment of the proposed technology efficiency when installing starting conductors in sedimentary rocks at mining allotments of coal mines are presented.

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