MODELLING THE HORIZONTAL VELOCITY FIELD OF THE NIZHNE-KANSK MASSIF ACCORDING TO GNSS OBSERVATIONS

Within the boundaries of the Nizhne-Kansk granite-gneiss massif, which directly borders on the Atamanovskiy branch of the Yenisei Ridge, the building of an underground research laboratory for validating the safety of disposal of high-level radioactive waste began in 2019. In 2010, researchers of the Mining and Chemical Combine at Zheleznogorsk and the Geophysical Center, Russian Academy of Sciences, organized a satellite geodetic network within the boundaries of the Nizhne-Kansk massif; this network included 30 GNSS stations intended for observations of modern crustal movements.The purpose of this study is to determine vectors and simulate the field of horizontal modern crustal movements from measurements made in 2010 - 2019. The tasks included: creating a catalogue of displacement data; calculating and estimating horizontal velocities of modern crustal movements, modelling the horizontal velocity field using artificial neural networks, developing a kinematic model of the area and comparing it with geological survey data.As a result, the resulting model was found to be in good agreement with the results of structural-geological and geodynamic studies in the area. The rate of convergence between the Siberian Platform and the West Siberian Plate in the interaction zone of the southern part of the Yenisei Ridge can be estimated as 2-4 mm/year. The movements of the selected area are due to sublatitudinal compression along an azimuth of 100-110 degrees. Within the selected tectonic blocks relatively low rates of modern horizontal movements of the earth's crust were obtained, which confirms the stable geodynamic regime of the structural block hosting the underground research laboratory. Thus, the results of the work demonstrate the possibility of disposal of high-level radioactive waste in the selected structural block.

Blastability and Ore Grade Assessment from Drill Monitoring for Open Pit Applications

Blasting performance is influenced by mechanical and structural properties of the rock, on one side, and blast design parameters on the other. This paper describes a new methodology to assess rock mass quality from drill-monitoring data to guide blasting in open pit operations. Principal component analysis has been used to combine measurement while drilling (MWD) information from two drill rigs; corrections of the MWD parameters to minimize external influences other than the rock mass have been applied. First, a Structural factor has been developed to classify the rock condition in three classes (massive, fractured and heavily fractured). From it, a structural block model has been developed to simplify the recognition of rock classes. Video recording of the inner wall of 256 blastholes has been used to calibrate the results obtained. Secondly, a combined strength-grade factor has been obtained based on the analysis of the rock type description and strength properties from geology reports, assaying of drilling chips (ore/waste identification) and 3D unmanned aerial vehicle reconstructions of the post-blast bench face. Data from 302 blastholes, comprised of 26 blasts, have been used for this analysis. From the results, four categories have been identified: soft-waste, hard-waste, transition zone and hard-ore. The model determines zones of soft and hard waste rock (schisted sandstone and limestone, respectively), and hard ore zones (siderite rock type). Finally, the structural block model has been combined with the strength-grade factor in an overall rock factor. This factor, exclusively obtained from drill monitoring data, can provide an automatic assessment of rock structure, strength, and waste/ore identification.

COMPREHENSIVE ASSESSMENT OF THE EFFECTIVENESS OF INVESTMENT POLICY IN THE ARCTIC REGIONS OF RUSSIA.

The article is devoted to the formation and improvement of mechanisms for the implementation of regional investment policy, the effectiveness of which depends not only on the activation of investment activities and increasing the investment attractiveness of regions, but also on their sustainable socio-economic development in general. Based on the author's methodological toolkit, which makes it possible to assess the effectiveness of the regional investment policy in conjunction with the institutional conditions for the implementation of investment activities and the practice of strategic planning of investment development, the author carried out a comprehensive assessment of the effectiveness of the investment policy of the regions of the Arctic zone of the Russian Federation (AZRF), which is strategically important for the sustainable development of the national economy macroregion, which determines the exceptional relevance and significance of the study. The author calculated integral indicators for three structural blocks of a comprehensive assessment of the effectiveness of the investment policy of the Arctic regions. Based on the results of calculations within the framework of the first structural block, it was determined that the most holistic 27institutional environment was created in the Krasnoyarsk Territory, the Murmansk Region, the Republic of Sakha (Yakutia) and the Yamalo-Nenets Autonomous District. Analysis of the quality of regional investment strategies within the framework of the second structural block showed that the most elaborated document is the investment strategyof the Murmansk region. Within the framework of the third structural block, it was determined that the most effective investment policy is carried out in the Arkhangelsk region —the only Arctic region where the integral performance indicator exceeded the average Russian level. In the rest of the Arctic regions, the measures taken to achieve the main goals of investment development are still insufficient. It is concluded that in order to increase the efficiency of the investment policy of the Arctic regions, it is necessary to strengthen the role of strategic planning in the practice of regional investment management, improve information support for investment activities, and stimulate scientific, technical and innovative activities.

PENTAMER WITH INTERSTITIAL ATOM AS THE STRUCTURAL BLOCK OF RECONSTRUCTED Si(331) AND Ge(331) SURFACES

Atomic structure models of the Si(331) and Ge(331) surfaces are developed based on unified structural block, containing pentamer with interstitial atom. The work is performed using density functional calculations.

A detailed research on the structural characteristics of Hoang Sa and Truong Sa archipelagos - East Vietnam Sea based on gravity data analysis

The Hoang Sa and Truong Sa archipelagos are the two archipelagos located in the East Vietnam Sea. In the geographic coordinate frame, the Hoang Sa archipelago is located more northward than the Truong Sa. Up to now many publications have discussed in detail structures of these archipelagos in terms of international and domestic scientific journals, the scientific workshop reports, as well as the outcome reports obtained from the research projects of different levels, such as state and ministry level projects. However the block characteristics of the two archipelago regions are still in controversy. By application of the new technique (Curvature Gravity Gradient Tensor - CGGT) for analysis and collection of the related available data, some new information about structural characteristics of the two blocks, such as their spatial distribution, the penetration of their boundaries and fault systems was obtained. According to the results, block characteristic is clearly reflected as a unique structural unit for Hoang Sa archipelago, which occupies a large area restricted mostly by the geographic coordinate frame: 111.2oE–113.2oE and 15.75oN–17.25oN. Here a large negative Hoang Sa structural block with the density less than 2.67 g/cm3 develops directly on a more negative regional structure. Unlike Hoang Sa block, the Truong Sa archipelago is not presented as a unique block. Its structure is divided into 3 main smaller blocks distributed along different directions. The first north - south structural block consists of a number of islands and sandbars: Dinh Ba, Song Tu Dong island, Song Tu Tay island, Thi Tu island, Ba Binh island, Ca Nham sandbar, Loai Ta island and Son Ca island, Nam Yet island, Truong Sa Lon island, Sinh Ton island, Ba Bau and Binh Nguyen island. The second structural block along the northeast - southwest direction includes the following islands and sandbars: Da Lat, Truong Sa island, Da Tay, Da Dong, Chau Vinh. The remaining Phan Vinh island, Toc Tan sandbar, Nui Le, Ky Van, Tham Hiem sandbar and Kieu Ngua sandbar are distributed in the third structural block. In addition, all the 3 blocks are the negative structures. In terms of geological structural boundaries: The estimated depth of the boundaries (uplifts, subduction zones, or faults,...) on Hoang Sa archipelago only reaches a maximum of 20 km. Meanwhile, that on Truong Sa archipelago is possibly over 20 km.

STRUCTURAL SCHEME OF A STEREOSCOPIC OBSERVATIONAL DEVICE FOR DAYTIME

The block diagram of the binocular observation device is considered. A variant of the structural block diagram of a stereoscopic optoelectronic observation device is proposed.

DEVELOPMENT OF A STRUCTURAL SCHEME FOR MODERNIZATION OF THE NIGHT CHANNEL OF THE 1PN61 DEVICE

The characteristics and shortcomings of the active-pulsed device 1PN61 are considered. The modernization of the structural block scheme the night-channel scheme of the observation device was created.