scholarly journals PURIFICATION OF OPEN PIT WATER OF PJSC «SEVERALMAZ» FROM DISPERSE PARTICLES OF CLAYEY MINERAL SAPONITE BY THE COAGULATION METHOD

2020 ◽  
Vol 55 ◽  
pp. 22-27
Author(s):  
Alexey I. Alekseev ◽  
◽  
Olga S. Zubkova ◽  
Arseniy S. Polyanskiy ◽  
◽  
...  
Keyword(s):  
Mineral Composition ◽  
Acoustic Method ◽  
Suspended Particles ◽  
Open Pit ◽  
Processing Plant ◽  
Diamond Mining ◽  
Residual Aluminum ◽  
Clayey Mineral ◽  
Calcium Aluminosilicate ◽  
Suspended Substances

In the article, the process of water purification mainly from suspended particles of clay mineral saponite is considered. Those particles are formed during the process of diamond mining in the quarry water of M.V. Lomonosov Mining and Processing Plant owned by PJSC «Severalmaz». The scheme of the existing technology of sedimentation of suspended particles using the acoustic method is shown. Using the granulometry method the size of suspended particles in free volume was studied, and the sedimentation rate of suspended substances was calculated using Stokes' formula. The mineral composition of suspended particles in the quarry water is determined using Х-ray phase analysis. Calculations of the sedimentation rates of suspended particles are given for aluminum sulfate – traditionally used in water clarification – and for calcium-aluminosilicate reagent developed when taking into account the mineral composition. The results of measurements of pH of the clarified water, the content of residual aluminum, and the indicator of turbidity of the water are shown

A Study of the Formation of a Plant Ecosystem in Areas of Disturbed Lands by the Aikhal Mining and Processing Plant

2020 ◽  
Vol 24 (1) ◽  
pp. 46-50
Author(s):  
I.V. Zen’kov ◽  
V.N. Vokin ◽  
E.V. Kiryushina ◽  
A.S. Morin ◽  
Zh.V. Mironova ◽  
...  
Keyword(s):  
Vegetation Cover ◽  
Satellite Images ◽  
Open Pit ◽  
Processing Plant ◽  
Ecological Balance ◽  
Business Operations ◽  
Diamond Mining

According to the results of processing satellite images of mining landscapes formed during the extraction and processing of diamond-containing ore, the coefficients of self-restoration of vegetation cover are determined. It has been established that in the mid-mountain and subpolar climate, at intensive rates of open-pit diamond mining, a very slow formation of all types of vegetation cover occurs, which does not meet the requirements of restoring the ecological balance when conducting business operations by diamond mining enterprises.

MODELING OF PROCESSES AND DEVELOPMENT OF MEASURES TO REDUCE DUST AND GAS EMISSIONS AT THE QUARRIES OF MINING AND PROCESSING PLANT

2019 ◽  
Vol 12 (2) ◽  
pp. 26-32 ◽  
Author(s):  
Алла Звягинцева ◽  
Alla Zvyaginceva ◽  
Светлана Сазонова ◽  
Svetlana Sazonova ◽  
В. Кульнева ◽  
...  
Keyword(s):  
Working Conditions ◽  
Environmental Safety ◽  
Open Pit ◽  
Dust Particles ◽  
Processing Plant ◽  
Technical Solution ◽  
Dust Collection ◽  
Gas Emissions ◽  
Improve Working ◽  
Surface Active

Existing measures for the suppression of dust and gas emissions during mass explosions at the quarry of a mining and processing plant were investigated. Measures have been developed to reduce dust and gas emissions, taking into account the analysis of existing measures to suppress dust and gas emissions from mass explosions in the open pit of the mining and processing plant of Lebedinsky GOK. The studies of surface active substances on the wettability of dust particles. In order to improve working conditions, it was proposed to reduce dust and gas emissions by suppressing them at the source of education, using the method of wetting and sticking of dust particles. The proposed engineering - technical solution can be used to reduce dust and gas emissions during massive explosions in the quarries of various mining and processing enterprises. The developed method is proposed to be used to ensure environmental safety and improve working conditions in industries with high dustiness by increasing the efficiency of dust collection.

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 Mathematical model and supporting algorithm to aid the sequencing and scheduling of mining with loading equipment allocation

2014 ◽  
Vol 67 (4) ◽  
pp. 379-387
Author(s):  
Arthur Andrade ◽  
Miguel Santoro ◽  
Giorgio de Tomi
Keyword(s):  
Mathematical Model ◽  
Mixed Integer Linear Programming ◽  
Time Horizon ◽  
Open Pit ◽  
Mixed Integer ◽  
Open Pit Mining ◽  
Processing Plant ◽  
Medium Term ◽  
Sequencing And Scheduling ◽  
Plant Capacity

This paper focuses on the sequencing and scheduling problem of open pit mining, with the allocation of loading equipment considering a medium-term horizon. This study considers the existence of a heterogeneous loading equipment fleet and two types of mineable material, namely ore or waste rock. For the mining of ore, the following requirements are taken under consideration: the mixture quality, a crusher, the processing plant capacity and a stockpile, called ROM stockpile. In this context, we present a mathematical model in mixed integer linear programming, supported by an algorithm that is responsible for moving the time horizon at each model run, aiming to generate mining orders resolved with optimality. Together, these orders describe the loading equipment mining plan.

scholarly journals Analysis of Environmental Costs’ Effect in Green Mining Strategy Using a System Dynamics Approach: A Case Study

2021 ◽  
Vol 2021 ◽  
pp. 1-18
Author(s):  
Amir Jafarpour ◽  
Siamak Khatami
Keyword(s):  
System Dynamics ◽  
Large Scale ◽  
Mining Operation ◽  
Open Pit ◽  
Open Pit Mining ◽  
Processing Plant ◽  
Environmental Costs ◽  
Mining Operations ◽  
Factors Affecting

Nowadays, one of the most significant problems in mining activities is the significance of analyzing environmental issues along with mining, concentration, and mineral processing operations to achieve the goals of sustainable development. Nevertheless, mine owners refuse to include environmental costs (EC) and consider them unprofitable. Due to the ever-increasing importance of environmental and social topics in recent years, there is a vital need for assessing the EC and its impact on total mining costs and implementing green strategies by the mining managers and engineers. The current study tries to model the mining cost structure by considering the causal relationships between different factors affecting open-pit mining costs to highlight the EC’s role. Furthermore, this research evaluates the effectiveness of implementing each possible mining green strategy in a large-scale copper mine using the System Dynamics (SD) approach. In this regard, seven scenarios and a combination of different environmental strategies, including mine reclamation, an environmental strategy for a condensation and processing plant, and environmental mining operations, have been considered for the SD-based economic analysis. The simultaneous use of the green mining strategies for the concentration and processing plant (Scenario 4) shows a high impact on cost reduction in the mining operation.

Jointing of rock mass in open pit at the Zhelezny mine of the Kovdor Mining and Processing Plant

2019 ◽  
pp. 11-15
Author(s):  
I. M. Ignatenko ◽  
◽  
E. B. Yanitsky ◽  
V. A. Dunaev ◽  
S. G. Kabelko ◽  
...  
Keyword(s):  
Rock Mass ◽  
Open Pit ◽  
Processing Plant

scholarly journals Drive systems of the drilling rigs for open pits in Ukraine: state and ways for improvement

2019 ◽  
Vol 123 ◽  
pp. 01042
Author(s):  
Viktor Khilov ◽  
Nataliia Hlukhova ◽  
Andrii Somin ◽  
Volodymyr Kiiko
Keyword(s):  
Frequency Characteristics ◽  
Open Pit ◽  
Open Pit Mining ◽  
Pass Band ◽  
Processing Plant ◽  
Drilling Process ◽  
Geological Conditions ◽  
Drive Systems ◽  
Drilling Rigs ◽  
Oscillation Frequencies

A comparative analysis is presented of the characteristics of drilling rigs used in open-pit mining in Ukraine. The experimental studies have been conducted of the drive systems and drilling rigs influence on the dynamics of the drilling process under the mining and geological conditions of the Central Mining and Processing Plant (Kryvyi Rih city, Ukraine). The frequency characteristics have been obtained and the dynamic properties of the automated drive systems, as well as frequency characteristics of the rotation mechanism transmissions have been analyzed. The behavior of natural oscillation frequencies in closed control loops of rotational drives was studied, and it has been determined that they exceed the cutoff frequency and fall into the pass band from the attenuation band in frequency-controlled induction motors of most advanced drilling rigs with the maximum number of rods connected in the drill string. It has been established that low oscillation frequencies due to the side frequencies, generated by the drill rod oscillations, fall into the fastest internal current loop. The tasks have been formulated for further research. The purpose of research is to solve the actual scientific and applied problem of dynamic compatibility of frequency characteristics in the modern high speed drive systems with the dynamic characteristics of drilling rigs, which are multi-mass mechanisms with distributed and concentrated parameters with a change in added masses.

scholarly journals THE APPLICATION OF A STOCKPILE STOCHASTIC MODEL INTO LONG-TERM OPEN PIT MINE PRODUCTION SCHEDULING TO IMPROVE THE FEED GRADE FOR THE PROCESSING PLANT

2020 ◽  
Vol 35 (4) ◽  
pp. 115-129
Author(s):  
Javad Gholamnejad ◽  
Ali Azimi ◽  
Reza Lotfian ◽  
Sara Kasmaeeyazdi ◽  
Francesco Tinti
Keyword(s):  
Production Scheduling ◽  
Open Pit Mine ◽  
Open Pit ◽  
Programming Approach ◽  
Chance Constrained Programming ◽  
Processing Plant ◽  
Low Grade ◽  
Mine Production ◽  
Mine Production Scheduling ◽  
Primary Model

This paper presents a chance-constrained integer programming approach based on the linear method to solve the longterm open pit mine production scheduling problem. Specifically, a single stockpile has been addressed for storing excess low-grade material based on the availability of processing capacity and for possible future processing. The proposed scheduling model maximizes the project NPV while respecting a series of physical and economic constraints. Differently from common practice, where deterministic models are used to calculate the average grade for material in the stockpiles, in this work a stochastic approach was performed, starting from the time of planning before the stockpile realization. By performing a probability analysis on two case studies (on iron and gold deposits), it was proven that the stockpile attributes can be treated as normally distributed random variables. Afterwards, the stochastic programming model was formulated in an open pit gold mine in order to determine the optimum amount of ore dispatched from different bench levels in the open pit and at the same time a low-grade stockpile to the mill. The chance-constrained programming was finally applied to obtain the equivalent deterministic solution of the primary model. The obtained results have shown a better feed grade for the processing plant with a higher NPV and probability of grade blending constraint satisfaction, with respect to using the traditional stockpile deterministic model.

scholarly journals Morphological features of ore reserves of the Novo-Uchaly vms deposit (Southern Urals)

2020 ◽  
Vol 63 (2) ◽  
pp. 35-46
Author(s):  
A. V. Spirina ◽  
V. V. Makarov ◽  
I. B. Moiseev ◽  
I. V. Vikentyev
Keyword(s):  
Mineral Composition ◽  
Southern Urals ◽  
Ore Deposits ◽  
Processing Plant ◽  
The Southern Urals ◽  
Ore Deposit ◽  
Ore Body ◽  
Folded Structure ◽  
Gold Silver ◽  
Copper Zinc

Background. The Novo-Uchaly copper-zinc VMS deposit in the Southern Urals (54°10΄54˝N and 59°20΄45˝E) is represented by a steeply dipping lens of Eifelian volcanics (rhyodacites and basalts), which are crumpled into a strongly compressed anticlinal fold. The ore deposit is blind and localised at the convergence of felsic (bottom) and mafic (top) rocks. The deposit is located at depths of 550 m (in the northern part) and 1050 m (in the southern part). The deposit thickness reaches 186 m. The length along the strike and along the dip equals 1250 m and 900 m, respectively. The ore body is intruded by gabbro-diorite and gabbro-diabase dikes. The main ore minerals are pyrite, sphalerite and chalcopyrite, as well as non-metallic minerals, such as quartz, barite and calcite. Unlike most of the Ural VMS deposits, this deposit is the zinc subtype (Zn >> Cu). The ores are predominantly massive and solid sulphide, being banded or brecciated in some parts. The main elements extracted are copper, zinc and sulphur, but gold, silver, cadmium, indium, cobalt, nickel, selenium and tellurium are also obtained.Aim. To clarify the morphology of the ore deposit, to study the ore mineral composition of the upper horizons of its northern part and to determine the underlying reasons for the complex lenticular structure of the sulphide reserve.Materials and methods. In the period 2017—2019, employees of the Institute of Ore Deposits, Petrography, Mineralogy and Biochemistry of the Russian Academy of Sciences (IGEM RAS) together with geologists of the Uchaly Mining and Processing Plant carried out a geological and mineralogical mapping of the deposit in the course of exploration works.Results. The ore contours and mineral composition of the northern part of the ore body were significantly clarified. A series of dikes of variable morphology was identified. A comparison was made of the results with current theories about the structure of the ore deposit. Detailed geological sections were determined and illustrate the complex lenticular structure of the ore deposit complicated by pinch and swell areas. The deposit was formed by processes of dynamic metamorphism.Conclusion. The geological and mineralogical structure of the deposit determined in the study enabled us to propose a schematic reconstruction of the conditions leading to the formation of its folded structure. The findings will help to re-assess the reserves and improve the system of operational exploration and delineation.

scholarly journals Prospects for using combined (traditional and physical-chemical) mining technologies in the development of large gold-copper ore deposits

2020 ◽  
Vol 192 ◽  
pp. 02001
Author(s):  
Artur Sekisov ◽  
Slava Korolev
Keyword(s):  
Ore Deposits ◽  
Open Pit ◽  
Open Pit Mining ◽  
Processing Plant ◽  
Copper Ore ◽  
Field Development ◽  
Stage Of Development ◽  
Physical Chemical ◽  
Ore Processing ◽  
Initial Stage

The article deals with the problems of development of large gold-copper ore deposits, which have prospects for the development of mining and processing complexes based on them, which produce refined metals as final products. The article substantiates the feasibility of using combined traditional and physical-chemical geotechnologies in the development of these deposits, including geotechnologies in mining, using innovative processes of activation of heap and underground leaching of copper, fine and dispersed gold from complex ores. At the initial stage of development of the large deposits of complex ores, in parallel with traditional schemes open-pit mining and ore processing at the processing plant, it is advisable to use the activation heap leaching of valuable components from poor and refractory ores and flotation tailings from ordinary and rich ore. At the second stage, when switching to the underground method of field development, it is proposed to use blockhole leaching with explosion-injection ore preparation with combination with it. The proposed schemes for combined development of complex gold-copper ore and copper-ore deposits with precious metal mineralization are based on data obtained during many years of experimental research and pilot tests.

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