Full-scale tests and application of NPGM emulsion explosive at ALROSA

2021 ◽  
pp. 58-62
Author(s):  
I. F. Bondarenko ◽  
R. Ya. Nikitin ◽  
I. V. Zyryanov
Keyword(s):  
Production Efficiency ◽  
Oil And Gas ◽  
Underground Mining ◽  
Investment Project ◽  
Full Scale ◽  
Underground Mines ◽  
Open Pit ◽  
Processing Plant ◽  
Emulsion Explosive ◽  
Emulsion Explosives

ALROSA performs blasting operations mainly using explosives manufactured on the spot. Considering modern trends of using local manufacture explosives, Company’s experience of application of emulsion explosives, as well as prompt introduction of technological innovations, novel process solutions are utilized in manufacture and use of emulsion explosives. To this effect, Udachny Mining and Processing Plant constructed and commissioned a plant to manufacture non-explosive components for emulsion explosives within the Plant’s infrastructure area. Emulsion explosives enable blasting in open pit and underground mines which are assumed hazardous in terms of oil and gas shows. Within the framework of technical upgrading at MMLT-500-PR Plant, the investment project on construction and commissioning of a modular production line to manufacture packaged emulsion explosives has been implemented. The field trials of NPGM grade emulsion explosive has proved the economic and production efficiency of blasting using this explosive in open pit and underground mining. This article presents the results of testing and application of NPGM emulsion explosive during blasting in open pit and underground mines of ALROSA. The outcomes of pilot explosions using this type explosive as the main borehole and chain charges, as well as intermediate detonators in full-scale conditions of an underground mine and in an open pit are described. The proposed technology features higher operational efficiency and is applicable in various geotechnical conditions of mineral mining.

scholarly journals Applying Artificial Pillar to Replace the Coal Pillar Protecting Roadway to Increase Production Efficiency and Sustainable Development in the Vietnamese Coal Industry

2021 ◽  
Vol 1 (2) ◽  
Author(s):  
Van Cuong DINH ◽  
Anh Tuan NGUYEN ◽  
Van Thanh TRAN ◽  
Thi Hoai Nga NGUYEN ◽  
Duc Hai DUONG
Keyword(s):  
Production Efficiency ◽  
Underground Mining ◽  
Coal Pillar ◽  
Coal Industry ◽  
Underground Mines ◽  
Open Pit ◽  
Coal Reserve ◽  
Increase Production Efficiency ◽  
Open Pit Mines ◽  
Mining Coal

Vietnam's domestic coal production is growing fast and is expected to reach 68.9 million tonsin 2030, nearly 1.5 times higher than today. Open-pit mines will gradually reduce production and close,and underground mining coal output will increase progressively year by year and take a leading role.Besides the investment in new mines to achieve these goals, it is necessary to maximize the coal reserveexploited annually of existing underground mine projects, which its coal reserve in pillars protectingroadways currently accounts for 12−15%. The further exploitation of this coal reserve will decrease thecosts of preparation of underground mines and granting mining rights and depreciation of infrastructureassets. Moreover, it will help reduce the loss of non-renewable resources and contributing to thesustainable development of Vietnam’s coal industry.

Experience of emulsion explosives manufacturing and use in open pit and underground mines of Kola Mining and Metallurgical Company

2015 ◽  
pp. 64-67
Author(s):  
O. V. Tokarev ◽  
◽  
Kuzenkov M. V. ◽  
R. G. Rastorguev ◽  
M. N. Overchenko ◽  
...  
Keyword(s):  
Underground Mines ◽  
Open Pit ◽  
Emulsion Explosives ◽  
Metallurgical Company

DETONATION OF A LOW-DENSITY EMULSION EXPLOSIVE

2020 ◽  
Author(s):  
S. A. GORINOV ◽  
◽  
I. YU. MASLOV ◽  
Keyword(s):  
Open Pit ◽  
Open Pit Mining ◽  
Low Density ◽  
Polystyrene Foam ◽  
Emulsion Explosive ◽  
Emulsion Explosives ◽  
Borehole Charge ◽  
Strength Material ◽  
Low Strength ◽  
High Degree

One of promising directions in conducting sparing highly mechanized blasting operations in open-pit mining may be the use of low-density emulsion explosives sensitized with light porous granules made of low-strength material (for example, granules of polystyrene foam). Experimentally, it was possible to show that such explosives allow mechanized charging into downward hole wells and allow forming a borehole charge that is virtually not subject to shrinkage at a height of up to 40 m. Low explosive densities make it possible to effectively use solid column charges for gentle blasting which, in turn, provides a high degree of mechanization of charging operations.

scholarly journals Technological Solutions for Processing Closed Coal Mines by Open Pit Method

2018 ◽  
Vol 41 ◽  
pp. 01041
Author(s):  
Vladimir Makarov ◽  
Péter Kovacs ◽  
Samuel Dagmar ◽  
Riccardo Paulman
Keyword(s):  
Underground Mining ◽  
Underground Mines ◽  
Residual Effects ◽  
Open Pit ◽  
Open Pit Mining ◽  
Mining Operations ◽  
Environmental Consequences ◽  
Harmful Emissions ◽  
Coal Reserves ◽  
Working Out

The main sources of environmental pollution are: pollution from the residual effects of working out of mine fields by underground method; pollution from secondary mining of mine fields by the open method. The pollution of the environment from the underground mining of mine fields is mainly due to the erosion of the surface of the ditches caused by collapse of the underground workings, spontaneous combustion of the remaining coal reserves and exit of poison gases SO2 and CO to the surface through the cracks from the lower horizons of the worked-out mine fields. This makes actual the research of technological possibilities of harmful emissions reducing when quarrying underground mines’ fields. The environment deterioration from conducting open pit mining operations in the underground mine fields is caused by the technological processes of quarrying (preparation of rock for excavation, excavation, transportation of rocks and coal, dumping), by the objects of the open pit infrastructure (industrial site, transport communications, trenches and other workings, coal storage and rock dumps). The main direction of eliminating the negative environmental consequences of underground mining is the localization or complete isolation of the underground mines influence’ on the surface.

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

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.

About scientific and practical conference explosives of the Urals

2022 ◽  
pp. 58-60
Author(s):  
G.P. Bersenev ◽  
A.V. Glebov ◽  
V.A. Kutuev
Keyword(s):  
Mining Industry ◽  
Underground Mines ◽  
Open Pit ◽  
Industrial Complex ◽  
Training Center ◽  
The Urals ◽  
Emulsion Explosives ◽  
International Participation ◽  
The Russian Federation ◽  
Practical Conference

The article reviews the results of the VIII Scientific and Practical Conference with international participation "Technology and Safety of Drilling and Blasting Operations in Surface and Underground Mines of the Urals" which was held at the Ekaterinburg-EXPO Exhibition Center and the Uralasbest Industrial Complex as part of the IX Urals Mining Industry Forum and the URAL MINING' 21 Exhibition dedicated to the Year of Science and Technology in the Russian Federation and the 30th Anniversary of the Urals Mining and Industrial Association. The article also informs about the winners of the Ural Mining Award 2021 and about the research and engineering reports and presentations made during the conference and dedicated to blasting operations. Results are summarized of the visiting seminar at the Uralasbest Industrial Complex, where the Chief Engineer of Promtekhvzvzryv Company N.A. Chistyakov and General Director of the Urals Explosives Association G.P. Bersenev conducted tours to the open-pit mine, the 'Poremit' Plant - the first emulsion explosives production facility in the Urals, a bulk explosives storage, the museum and training center of the Urals Asbestos Mining and Processing Complex. Following the tours of the training center site of the Processing Complex, the second part of the conference was held, during which a number of reports were delivered. Upon completion of the seminar, the Urals Explosives Association awarded honorary certificates and valuable gifts to specialists of the Promtekhvzvzryv Company for their contribution to improvement of drilling and blasting technology and organization of labor on blasting sites. The article is concluded by a summary of the Conference's decisions.

A method to improve the quality of rock preparation for extraction with emulsion explosives in open-pit mines with high benches

2022 ◽  
pp. 62-67
Author(s):  
I.A. Pytalev ◽  
D.V. Domozhirov ◽  
E.E. Shvabenland ◽  
A.A. Prokhorov ◽  
V.V. Pronin
Keyword(s):  
Charge Density ◽  
Blast Hole ◽  
Production Capacity ◽  
Open Pit ◽  
Emulsion Explosive ◽  
Mining Operations ◽  
Emulsion Explosives ◽  
Density Control ◽  
Methodological Principles

Increasing the production capacity of open-pit and strip mines while ensuring the efficiency of the mining enterprise can be achieved through enhancing the quality of rock preparation prior to excavation. The use of emulsion explosives and the transition to the high-bench technology can reduce the cost of mining operations by optimizing the drilling and blasting parameters. The article reviews methods to improve the efficiency of rock preparation for extraction based on the applicable scientific and methodological principles and it proposes a method to regulate the density of emulsion explosives. Schemes are presented for calculation of drilling and blasting parameters when implementing technical measures aimed at improving the blasting quality through rock preparation for extraction in conditions of overburden and mining operations with bench height of 15 m and higher. Parameters of drilling and blasting operations on high benches are justified with differentiation of the charge density along the length of the blast hole by controlling the delivery of the gas-generating additive. A simulation has been performed and the results of pilot tests of the emulsion explosive charge density control at the Ural deposits are presented.

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

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.

Evaluation of Geohazards in the Cape Girardeau area using LiDAR and GIS, Southeast Missouri, USA

2021 ◽  
Author(s):  
OLUFEYISAYO B ILESANMI ◽  
J David Rogers ◽  
Francisca E Oboh-Ikuenobe
Keyword(s):  
Emergency Preparedness ◽  
Oil And Gas ◽  
Open Pit ◽  
Seismic Zone ◽  
Mass Wasting ◽  
Open Pit Mines ◽  
Ground Shaking ◽  
Flood Plains ◽  
Weighted Analysis ◽  
Commercial Center

Abstract The New Madrid Seismic Zone (NMSZ) has historically recorded some of the largest intensity earthquakes in North America, including significant earth movements that resulted in about 2,000 felt earthquakes during 1811-1812. The region continues to experience mass wasting due to earth movements. The aim of this study is to understand the influence of geologic variables on mass wasting processes in the greater Cape Girardeau area; which forms the commercial center of Missouri's fertile "Bootheel" region. Earth movement susceptibility was evaluated in Cape Girardeau and Bollinger counties and portions of Stoddard and Scott counties by mapping potential landslide features on topographic maps, field verification of such features, and geospatial analysis of recent LiDAR imagery. In order to evaluate the changes in surface morphology, slope inclination, hillshade aspect, hydrology, lithology, faults, precipitation, seismicity, sinkholes, and geohydrology were considered. Geographically weighted analysis of the geomorphologic variables identified zones of relative risk. In addition, data were evaluated for oil and gas pipelines, bridges, utilities, and open pit mines associated with mass wasting on public and economic infrastructure. The results suggest that anthropogenic changes commonly associated with urban development impact land use, runoff, infiltration, and slope failures, while sustained precipitation and seismic ground shaking tend to trigger landslides. The scale of mass wasting in the study area was robust, varying from as small as one-half hectare to as much as 67 km2. The vulnerability of the population in susceptible areas tends to increase at the lower elevations and on alluvial flood plains. Thus, hazard susceptibility evaluation can be useful in both community planning as well as emergency preparedness.

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