“Yakutniproalmaz” Institute:

Chaadaev A. S., Director of Institute, Candidate of Economical Sciences, e-mail: institut-yna@alrosa.ru

Komarov M. A.,Hydraulic Engineer

Dolgikh S. N.,Head of Department

B. E. Vedeneev All-Russian Research Institute of Hydraulic Engineering (VNIIG):

Maksimov I. A., Candidate of Engineering Sciences

The analysis of design experience, construction and exploitation of frozen-type low-head dams in Western Yakutia is held for water supply of the camp and industrial territory of Nurbinskiy ore-dressing and processing enterprise. The principal objective of the project is to develop a method of dams construction in one year using local construction materials. The invention materials, results of field and calculating observations and natural conditions in the reservoir’s location area are taken as the basis of structural and technological solutions and their substantiation. The calculating observations are held by the evaluation and forecast of thermal regime of reservoir dams of Yakutia. The possibility of construction and exploitation of hydraulic facilities with use of geomembrane and frost soils under conditions of Western Yakutia is established. It is shown for the first time that taking into account the depth of seasonal defrostings is the determining factor for choosing the Maximum Flood Level (MFL) elevation when other conditions are equal. When the MFL elevation is fixed below the depth of seasonal defrostings, there is excluded the possibility of water filtering from the reservoir in and around the seasonally thawed soils. The research results allow to assume that the proposed structural and technological solutions for construction of frozen type dams ensure their safe operation.

1. Certificate of Authority RU 2310035 C2 MPK E02V7/06. Sposob vozvedeniya gruntovoy platiny merzlogo tipa (Method of the construction of frozen type soil platinum). Maul V. K., Komarov Sh. A, Bull. No. 31, 2007.

2. Godovoy otchet o sostoyanii sooruzheniy NGOKa (Annual report about the status of facilities of Nurbinskiy ore-dressing and processing enterprise), Nakyn, 2006.

3. Otchet po teme “Raschetnye issledovaniya po otsenke i prognozu termicheskogo rezhima plotiny, ee osnovaniya, beregovykh primykaniy i lozha vodokhranilishcha na proektnyy srok ekspluatatsii” (Report : “Calculations on the assessment and forecast of the thermal regime of the dam and its foundation, the landfall of the reservoir bed, and a design life”), Belgorod, 2008.

4. Otchet “Geotekhnicheskiy kontrol kachestva vozvedeniya plotiny bufernogo vodokhranilishcha Nyurbinskogo GOKa” (Report “Geotechnical quality control of the buffer reservoir dam construction of Nurbinskiy ore-dressing and processing enterprise), Svetlyy, 2003.

5. Construction Directives and Rules 2.06.04-82. Nagruzki ot vozdeystviya na gidrotekhnicheskie sooruzheniya (volnovye, ledovye i ot sudov) (Loads from the impact on hydrotechnical facilities (wave, ice, and from vessels)). Decree of the State Committee of USSR Council of Ministers for Construction, 15.06.1982, No.161.

6. Otchet o kompleksnykh inzhenerno-stroitelnykh izyskaniyakh na obekte “Almazodobyvayushchee predpriyatie OAO “ALROSA-Nyurba”. Vremennoe vodokhranilishche. Ch. 2. Inzhenerno-geologicheskie izysyskaniya (Report about the complex construction and engineering investigations at the facility “diamond-mining enterprise of OJSC “Alrosa-Nyurba”. A temporary reservoir. Vol. II. Geological and engineering investigations), Mirnyy, 2003.

7. Almazodobyvayushchee predpriyatie OAO “ALROSA-Nyurba”. Obshcheinzhenernaya chast, proekt, shifr 3670. (Diamond-mining enterprise OJSC "Alrosa-Nyurba". General engineering part, project, code 3670), Mirnyy, 2003.