Effectiveness of Geo-Energy Usage during Underground Mining of Deposits

Topicality of rock pressure energy usage in technologies of underground mining of deposits is revealed. Methodology of geo-energy processes research in the interior of the Earth is described. Energy theory of zonal capsulation parameters research by massif of underground workings is proposed. Results verification of theoretical research is executed by laboratory and industrial tests conducting. Economic and mathematical model of determination of unit costs on types of mining operations is substantiated and volumes of savings during usage of geo-energy during mining operations conducting are determined.

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Analysis of blasting seismic impact on underground mining workings under the conditions of the Magnezitovaya mine

E3S Web of Conferences ◽

10.1051/e3sconf/202019201029 ◽

2020 ◽

Vol 192 ◽

pp. 01029

Author(s):

Vyacheslav Kutuev ◽

Pavel Menshikov ◽

Sergey Zharikov

Keyword(s):

Underground Mining ◽

Seismic Effect ◽

Industrial Safety ◽

Seismic Stability ◽

Dynamic Impact ◽

Mining Operations ◽

Slowing Down ◽

Underground Workings ◽

Mine Workings ◽

Seismic Impact

Seismic impact of technological explosions on underground mining workings of the Magnezitovaya mine was assessed. Seismic stability of rocks of the Magnezitovaya mine was determined and safe distances from technological explosions have been calculated by the admissible seismic effect for rocks. URAN and Minimate Plus seismic recorders with three-component seismic receivers were used to establish the dynamic impact on the mine workings. Based on comparison of calculated values and experimental measurements, the recommendations are given for explosive mass limitation at a slowing-down stage at a level of minimum dangerous values for technological explosions in underground mine. It is established that the blasting operations carried out at the Magnezitovaya mine of PAO Magnezit Combine with fan longhole stopping were performed with the seismic impact safety of underground technological explosion and will not lead to the loss of rock mass stability near the underground workings. Relevance of these studies is to ensure industrial safety of underground mining operations.

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Methodology of modeling nonlinear geomechanical processes in blocky and layered rock masses on models made of equivalent materials

Записки Горного института ◽

10.31897/pmi.2021.4.7 ◽

2021 ◽

Vol 250 ◽

pp. 542-552

Author(s):

Boris Zuev

Keyword(s):

Rock Mass ◽

Underground Mining ◽

Similarity Criterion ◽

Nonlinear Problems ◽

Rock Masses ◽

Mining Operations ◽

Initial Field ◽

Reliable Determination ◽

Nonlinear Geomechanical Processes

The research purpose is to develop a methodology that increases the reliability of reproduction and research on models made of equivalent materials of complex nonlinear processes of deformation and destruction of structured rock masses under the influence of underground mining operations to provide a more accurate prediction of the occurrence of dangerous phenomena and assessment of their consequences. New approaches to similarity criterion based on the fundamental laws of thermodynamics; new types of equivalent materials that meet these criteria; systems for the formation of various initial and boundary conditions regulated by specially developed computer programs; new technical means for more reliable determination of stresses in models; new methods for solving inverse geomechanical problems in the absence of the necessary initial field data have been developed. Using the developed methodology, a number of complex nonlinear problems have been solved related to estimates of the oscillatory nature of changes in the bearing pressure during dynamic roof collapse processes; ranges of changes in the frequency of processes during deformation and destruction of rock mass elements, ranges of changes in their accelerations; parameters of shifts with a violation of the continuity of the rock mass under the influence of mining: secant cracks, delaminations, gaping voids, accounting for which is necessary to assess the danger of the formation of continuous water supply canals in the water-protection layer.

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Investment appeal assessment of Pt-rich and Cu-Ni deposits of Monchegorsky ore district in current conditions

Ores and metals ◽

10.47765/0869-5997-2021-10003 ◽

2021 ◽

pp. 42-56

Author(s):

Valery Rogizny ◽

Danila Kulikov ◽

Maria Karpukhina ◽

Alexey Cheremisin ◽

Vasily Khromov

Keyword(s):

Underground Mining ◽

Open Pit ◽

Processing Plant ◽

Mining Equipment ◽

Mining Operations ◽

Processing Plants ◽

Ore Grades ◽

Underground Workings ◽

Mining Projects ◽

Ore District

Development potential and investment attractiveness of PGM deposits (Monchegorsky ore district) are discussed. By the late 2020, the reserves of these deposits were approved based on results of a feasibility study review assessment in the State Reserve Commission and TsNIGRI approval. In current mineral market conditions (including high Pd price), the most attractive development projects are Vuruchuaivench deposit comprising 4 areas (Plast 300, Vuruchuaivench, Yuzhnosopchinsky and Arvarench), NittisKumuzhya-Travyanaya occurrence and Loipishnyun area. In terms of reserves, ore grades and proximity to processing plants, these potential mining projects are less expensive if developed concurrently. The paper presents recommendations for PGM deposit opening, development and mining using advanced mining equipment in open-pit and underground mining operations, ore conveying and processing plant tailings disposal to infill underground workings. Economic estimates were made supporting development viability of the above deposits within Monchegorsky ore district.

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HADIS KURAIB DALAM KONSEP RUKYATUL HILAL

JURNAL PENELITIAN ◽

10.28918/jupe.v13i2.723 ◽

1970 ◽

Vol 13 (2) ◽

Author(s):

Muslih Husein

Keyword(s):

The West ◽

The Earth ◽

New Moon ◽

The Republic

Hisab dan rukyat, hakikatnya, adalah cara untuk mengetahui pergantian bulan. Kajian ini memperlihatkan beberapa temuan. Pertama, korelasi antara hadis Kuraib dan terjadinya perbedaan penetapan awal Ramadan, Syawal, dan Dzul Hijjah di Indonesia. Kementerian Agama Republik Indonesia telah menetapkan bahwa Indonesia secara keseluruhan menjadi satu wilayah hukum (wilayatul hukmi). Kedua, tentang keberhasilan rukyat al-hilal di satu kawasan yang diberlakukan bagi kawasan lain di muka bumi. Perlu diketahui bersama bahwa visibilitas pertama hilal tidak meliputi seluruh muka bumi pada hari yang sama, melainkan membelahnya menjadi dua bagian: (1) bagian sebelah Barat yang dapat melihat hilal dan (2) bagian sebelah Timur yang tidak dapat melihat hilal.Hisab and rukyat is a way to know the turn of the month. This study shows several findings. First is the correlation between Kuraib traditions and differences in the determination of the beginning of Ramadan, Shawwal, and Dhul-Hijjah in Indonesia. Ministry of Religious Affairs of the Republic of Indonesia has stated that Indonesia as a whole into a single jurisdiction (wilayatul hukmi). Second, on the success rukyat alhilal in one area that applied to other regions of earth. Important to know that the first visibility of the new moon does not cover the entire face of the earth on the same day, but splitting it into two parts: (1) part of the West to see the new moon, and (2) part of the East were not able to see the new moon.

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Forecasting the fl ood situation using space images in the city of Tavda Sverdlovsk region

Geodesy and Cartography ◽

10.22389/0016-7126-2018-934-4-46-52 ◽

2018 ◽

Vol 934 (4) ◽

pp. 46-52

Author(s):

A.S. Bruskova ◽

T.I. Levitskaya ◽

D.M. Haydukova

Keyword(s):

Water Levels ◽

Economic Damage ◽

Geoinformation System ◽

Space Images ◽

Geoinformation Systems ◽

Emergency Situations ◽

The Earth ◽

Maximum Water ◽

The City

Flooding is a dangerous phenomenon, causing emergency situations and causing material damage, capable of damaging health, and even death of people. To reduce the risk and economic damage from flooding, it is necessary to forecast flooding areas. An effective method of forecasting emergency situations due to flooding is the method of remote sensing of the Earth with integration into geoinformation systems. With the help of satellite imagery, a model of flooding was determined based on the example of Tavda, the Sverdlovsk Region. Space images are loaded into the geoinformation system and on their basis a series of thematic layers is created, which contains information about the zones of possible flooding at given water level marks. The determination of the area of flooding is based on the calculation of the availability of maximum water levels at hydrological stations. According to the calculated security data, for each hydrological post, flood zones are constructed by interpolation between pre-calculated flood zones of standard security. The results of the work can be used by the Main Directorate of the Ministry for Emergency Situations of Russia for the Sverdlovsk Region.

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Geological CO2 quantified by high-temporal resolution stable isotope monitoring in a salt mine

Scientific Reports ◽

10.1038/s41598-020-77635-5 ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Alexander H. Frank ◽

Robert van Geldern ◽

Anssi Myrttinen ◽

Martin Zimmer ◽

Johannes A. C. Barth ◽

...

Keyword(s):

Temporal Resolution ◽

Underground Mining ◽

Stable Carbon Isotope ◽

Underground Mines ◽

Background Concentration ◽

High Temporal Resolution ◽

Salt Mine ◽

Gas Migration ◽

Mining Operations ◽

Anthropogenic Contributions

AbstractThe relevance of CO2 emissions from geological sources to the atmospheric carbon budget is becoming increasingly recognized. Although geogenic gas migration along faults and in volcanic zones is generally well studied, short-term dynamics of diffusive geogenic CO2 emissions are mostly unknown. While geogenic CO2 is considered a challenging threat for underground mining operations, mines provide an extraordinary opportunity to observe geogenic degassing and dynamics close to its source. Stable carbon isotope monitoring of CO2 allows partitioning geogenic from anthropogenic contributions. High temporal-resolution enables the recognition of temporal and interdependent dynamics, easily missed by discrete sampling. Here, data is presented from an active underground salt mine in central Germany, collected on-site utilizing a field-deployed laser isotope spectrometer. Throughout the 34-day measurement period, total CO2 concentrations varied between 805 ppmV (5th percentile) and 1370 ppmV (95th percentile). With a 400-ppm atmospheric background concentration, an isotope mixing model allows the separation of geogenic (16–27%) from highly dynamic anthropogenic combustion-related contributions (21–54%). The geogenic fraction is inversely correlated to established CO2 concentrations that were driven by anthropogenic CO2 emissions within the mine. The described approach is applicable to other environments, including different types of underground mines, natural caves, and soils.

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