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Количество страниц: 5 с.
- Прикладные науки. Медицина. Ветеринария. Техника. Сельское хозяйство > Инженерное дело. Техника в целом > Горное дело. Горные предприятия (рудники, шахты, карьеры),
- НАУКА ЯКУТИИ > ПРИКЛАДНЫЕ НАУКИ. МЕДИЦИНА. ТЕХНИКА. СЕЛЬСКОЕ ХОЗЯЙСТВО > Инженерное дело. Техника в целом > Горное дело. Горные предприятия (рудники, шахты, карьеры).
The article presents the results of many years of research in the field of air (dry) method of separation (enrichment) of minerals. The results of a manufactured pneumatic separator of the POS-2000 type, which passed pilot tests in a number of gold ore deposits in Yakutia and the Amur region, are presented. The work presents developments to improve the design and production parameters of the installation, where reduction of weight and size parameters is relevant and in demand at this time, especially for mobile mobile versions of enrichment plants. The article shows laboratory experimental work aimed at a detailed study of the dynamics of the behavior of multiphase media in complex chambers, both in simplified laminar and turbulent cases. For a more detailed study of the influence of different air flow on the process of separating various minerals by density and size, an experimental laboratory installation with three toroidal zones was assembled, consisting of a flexible transparent plastic reinforced pipe, bent in the form of a screw (screw helicoid). The maximum angles of rise of particles along the internal boundary of the laboratory stand, the speed of soaring of particles depending on density and size, the maximum angles of hovering and soaring at different air speeds are considered. Studies have been carried out on the distribution of particles in the radial section in different sections of the pipe (S1-S3), in which angular differences in distribution were obtained due to different levels of the ratio of centrifugal and gravitational forces, at tested speeds and turning radii. Further research aimed at the possibility of modifying the existing pneumatic separator to reduce weight and size and the development of a new type of centrifugal pneumatic separator are shown. The work was carried out within the framework of the state assignment of the Ministry of Science and Higher Education of the Russian Federation (topic No. 0297-2021-0022 of the unified state information system for recording research, development and technological work for civil purposes No. 122011800089-2) using the equipment of the Center for Collective Use of the Federal research center "Yakut Scientific Center of the Siberian Branch of the Russian Academy of Sciences", grant No. 13. Center for collective use 21.0016.
Лебедев, И. Ф. Теоретические и прикладные основы создания центробежных пневмосепараторов для обогащения драгоценных металлов по плотности и крупности / Лебедев И. Ф. ; Институт горного дела Севера им. Н. В. Черского // Успехи современного естествознания. - 2023. - N 11. - С. 155-159. - DOI: 10.17513/use.38157
DOI: 10.17513/use.38157
Количество страниц: 8 с.
- Математика. Естественные науки > Физика,
- Прикладные науки. Медицина. Ветеринария. Техника. Сельское хозяйство > Инженерное дело. Техника в целом > Строительство подземных сооружений. Земляные работы,
- НАУКА ЯКУТИИ > МАТЕМАТИКА. ЕСТЕСТВЕННЫЕ НАУКИ > Физика,
- НАУКА ЯКУТИИ > ПРИКЛАДНЫЕ НАУКИ. МЕДИЦИНА. ТЕХНИКА. СЕЛЬСКОЕ ХОЗЯЙСТВО > Инженерное дело. Техника в целом > Строительство подземных сооружений. Земляные работы.
One of the effective ways to protect underground mines in mines of the North, operating in alternating or positive thermal conditions, from thawing is the use of heat-protective sprayed concrete coatings with light filler. The article presents the results of research based on the developed methodology and software package for predicting the dynamics and features of the formation of the thermal regime in the mine workings of a gold placer mine in the permafrost zone secured with metal and combined heat-protective shotcrete support. Forecast calculations of the parameters of the thermal regime of workings presented in graphical form were carried out. It was concluded that heat-protective support up to ten centimeters thick does not protect mine workings from thawing and to prevent this it is necessary to use more advanced supports and regulate the thermal regime in the mine in the summer. If the mine is mothballed for the summer, the use of heat-protective shotcrete will allow the mine mothballing period to be shifted to the beginning of June, thereby extending the mining season. It is emphasized that the thermal regime is the main factor determining the operating conditions of a mining enterprise - year-round or with conservation for the summer period, which are determined by technical and economic calculations. The work was carried out within the framework of the state assignment of the Ministry of Science and Higher Education of the Russian Federation (topic No. 0297-2021-0021 of the unified state information system for recording research, development and technological work for civil purposes No. 122011800083-0) using the equipment of the Center for Collective Use of the Federal research center "Yakut Scientific Center of the Siberian Branch of the Russian Academy of Sciences", grant No. 13. Center for collective use 21.0016.
Прогноз теплового режима горных выработок глубокой золотороссыпной шахты криолитозоны, закрепленных металлической и комбинированной теплозащитной набрызгбетонной крепью / Курилко А. С., Соловьёв Д. Е., Киселев В. В. [и др.] ; Институт горного дела Севера им. Н. В. Черского // Успехи современного естествознания. - 2023. - N 11. - С. 147-154. - DOI: 10.17513/use.38156
DOI: 10.17513/use.38156
Издательство: Вилюйская улусная типография
Год выпуска: 2010
Количество страниц: 128 с.
Издательство: Книжное издательство
Год выпуска: 1976
Количество страниц: 140 с.
Влияние усталости на хладостойкость сварных соединений / В. П. Ларионов, Р. С. Григорьев, И. М. Стебаков ; Академия наук СССР, Сибирское отделение, Якутский филиал, Институт физико-технических проблем Севера. - Якутск : Книжное издательство, 1976. - 136 с.
Количество страниц: 7 с.
The article provides brief information on the current state of healthcare in the Oymyakonsky ulus of the Republic of Sakha (Yakutia). Based on a survey of 440 respondents, the social conditions of local residents and those who have moved from this district to other settlements of the Russian Federation have been analyzed. The reasons for the migration outflow of the population from Oymyakonskii ulus of Yakutia to other settlements of the Russian Federation were reviewed. It was revealed that 42,8 % of the respondents are planning to move to another district or city, and 32,8 % periodically have a similar intention. The study showed that only 4.1 % of ulus residents are satisfied by the performance of local physicians, whereas among those who have previously left the region this indicator was 47.6 %. This fact is mainly due to the lack of specialized doctors and the high turnover rate due to the lack of housing for visiting specialists, difficult living conditions and harsh climate. According to the respondents, unsatisfaction with the quality of medical care and the desire to give a good education to children are the strongest predictors of the emigration of the local population outside the ulus. It is important to note that the vast majority of those who have left the district do not plan to return. All of the above shows that this problem requires comprehensive government assistance, especially in the field of health care.
Слепцов, С. С. Влияние качества здравоохранения на отток населения из отдаленных районов Якутии (на примере Оймяконского улуса) / Слепцов С. С., Андреев М. Н., Слепцова С. С. ; Якутский научный центр комплексных медицинских проблем, Северо-Восточный федеральный университет им. М. К. Аммосова // Успехи современного естествознания. - 2023. - N 7. - С. 42-48. - DOI: 10.17513/use.38069
DOI: 10.17513/use.38069
Издательство: Просвещение
Год выпуска: 1986
Количество страниц: 100 с.
Издательство: Стандарт
Год выпуска: 2012
Количество страниц: 248 с.
Количество страниц: 48 с.
The article discusses the skidding concept, types and methods. In addition to specialized skidding tractors (cable skidder, grapple skidder, with a pack grip, and forwarders), modern single-machine complexes for harvesting wood according to Canadian and Scandinavian cutting technologies are presented. A theoretical analysis of tractor skidding performance is carried out, namely: the influence of the average skidding distance and soil conditions is estimated; an assessment of the impact of the type of logging and the taxation characteristics of the stand is given; the influence of soil and terrain conditions is estimated; the impact of the operator's qualifications and working conditions is evaluated. Based on the analysis of literature sources and production experience in the field of logging operations, the expediency of changing the operating mode of operators, as well as the use of special application software packages that allow real-time evaluation of the efficiency of the skidding tractor and its technical condition is justified. The influence of the category of soil conditions and the presence of non-operational areas in the cutting area on the average skidding distance, other conditions being equal, is shown. The work was carried out within the framework of the scientific school "Innovative developments in the field of logging industry and forestry" of the Arctic State Agrotechnological University.
Анализ влияния природно-производственных условий на производительность тракторной трелевки / О. А. Куницкая, А. В. Петров, А. А. Кривошеев [и др.] ; Арктический государственный агротехнологический университет, Ухтинский государственный агротехнологический университет, Военный учебно-научный центр Военно-воздушных сил "Военно-воздушная академия им. проф. Н. Е. Жуковского и Ю. А. Гагарина", АО "Гипростроймост-Санкт-Петербург" // Вестник АГАТУ. - 2023. - N 4 (12). - C. 102-149.
Количество страниц: 10 с.
An analysis of modern technologies for pneumatic grain separation is provided. The necessity of increasing the efficiency of pneumatic separation of grain at all stages of its production, starting from the grain combine and ending with the operations of preparing grain for grinding, is substantiated. The main structural and technological reasons for the low efficiency of pneumatic separating systems have been identified. A method for determining the terminal velocity of grain in a portioned pneumatic classifier is presented. The process of pneumatic classification of seeds of cereals that have undergone full-flow seed processing technology has been studied. The basic physical laws for determining the speed of terminal velocity of grain in an ascending vertical air flow are substantiated. It has been established that seed material that has passed through the seed processing production line varies in terminal velocity.
Проблемы и перспективы совершенствования процессов пневмосепарации зерна / В. М. Дринча, Ю. Ж. Дондоков, И. Н. Аммосов [и др.] ; Арктический государственный агротехнологический университет // Вестник АГАТУ. - 2023. - N 4 (12). - C. 92-101.