We present the articles of the third issue of scientific journal "Mining Science and Technology” (Russia) for 2024:

Using hydrodynamic simulation based on a multicomponent (compositional) model, a comparative analysis of the development of a gas-condensate reservoir by vertical and horizontal wells was carried out, the results of which revealed the advantage of reservoir development by vertical wells compared to horizontal wells in terms of maximum condensate recovery.

For more information, see the article:

🔥 Tomskiy K.O., Ivanova M.S., Nikitin E.D., Rudykh L.A. Application of hydrodynamic simulation on the basis of a composite model to improve the efficiency of gas-condensate reservoir development. Mining Science and Technology (Russia). 2024;9(3):221-230. https://doi.org/10.17073/2500-0632-2023-10-176 🔥

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#inenglish #MST #condensate #field #condensate_recovery #gas #geomechanics #geophysics #oil #well #deposit #modeling

We present the articles of the third issue of scientific journal "Mining Science and Technology” (Russia) for 2024:

A systematic approach to evaluating environmental safety in metro operations, based on modelling the development of defects in tunnel structures under the influence of hydrogeological factors, will help organize existing information on potential accidents and develop monitoring methods and measures to minimize risks that compromise the environmental sustainability of underground transport infrastructure.

For more information, see the article:

📌 Zhukov S.A. Substantiation of environmental safety in metro facility operations considering hydrogeological risks. Mining Science and Technology (Russia). 2024;9(3):283-291. https://doi.org/10.17073/2500-0632-2024-04-259

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#inenglish #MST #metro #underground #subway #ecology #safety #innovation #risks #geology #transport #hydrogeology #sustainability #accident #monitoring #tunnel #technology #construction #emission #energy #efficiency #concrete #defects #extraction #quicksand #aquifer #borehole #lining #deformation #leaching #tubbing #modeling #geomechanics #waterproofing #disposal #waste

How to estimate the modulus of deformation of a block rock masses using discrete element simulations?

The deformation modulus of rock mass is a fundamental parameter in the geomechanics of tunnels, mining, and other geotechnical rock-supported facilities. The mechanical properties of a rock mass, seen as a fractured medium, are determined by the intact rock, the pattern of relative joint-sets, the geometrical arrangement of the joints, and their mechanical properties. Joint sets, acting as planar discontinuities, confer scale and direction-dependent mechanical properties. The critical factor influencing the deformational behavior of a rock mass is the stiffness of its fractures and discontinuities. The present study investigates the anisotropic deformation modulus of blocky rock masses formed by three intersecting joint sets, including two orthogonal sets. This was achieved through discrete element simulations of representative volumes of blocky rock masses. These studies facilitate the estimation of the blocky rock mass deformation modulus in different directions without the need for laboratory and in-situ tests or empirical relationships.

For more information, see the article:

📌 Ahrami O., Javaheri Koupaei H., Ahangari K. Determination of deformation modulus and characterization of anisotropic behavior of blocky rock masses. Mining Science and Technology (Russia). 2024;9(2):116-133. https://doi.org/10.17073/2500-0632-2023-08-143

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#inenglish #MST #anisotropy #deformation #modulus #mass #rocks #loading #fracture #stiffness #strength #shear #resistance #stress #displacement #sliding #quartz #modeling #coefficient #index #blocks #deformations #material #surface #structure #boundary #experiment #geomechanics #JRC #UCS #GSI #simulation

How can the efficiency of flotation processing of complex ores be improved?

Flotation beneficiation plays a leading role in the processing most ores. The efficiency of this process is ensured by the correct selection of operating modes, which involves choosing the most selective reagents and determining their optimal consumption. The conducted research, presented in the journal Mining Science and Technology, allowed to find a new methodological approach to the study of ore flotation beneficiation using ionometry methods. The data obtained from ion-selective sensors significantly deepen our insight into the transformations occurring during the flotation process and allow for consideration of possible adverse factors that hinder effective process progression. A universal flowchart for flotation studies with ion-selective sensors has been developed, facilitating the application of this approach to various ores. The implementation of the results from this comparative analysis has led to a 7.8% increase in beneficiation efficiency while reducing reagent consumption. Additionally, the insights gained into the electrochemical processes occurring allowed for assumptions about the adverse factors affecting flotation outcomes. In conclusion, a model for the potential application of this approach at existing enterprises was proposed, including the implementation of an “intelligent assistant” for flotation operators based on the developed electrochemical models.

For more information, see the article:

📌 Yakovleva T.A., Romashev A.O., Mashevsky G.N. Enhancing flotation beneficiation efficiency of complex ores using ionometry methods. Mining Science and Technology (Russia). 2024;9(2):146-157. https://doi.org/10.17073/2500-0632-2023-08-145

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#inenglish #MST #flotation #beneficiation #ore #method #ionometry #ion #reagent #experiment #electrode #concentrate #pulp #grinding #modification #selectivity #aeration #sorption #corrosion #depression #kinetics #modeling #optimization #sensor #membrane #xanthate #sulfide #control

What are the environmental consequences of mining operations in Arctic regions?

The problems of geoenvironmental consequences of mining operations are especially acute in the arctic and subarctic regions, where the spread of permafrost significantly reduces the buffering capacity of landscapes. The research, the results of which are published in the journal Mining Science and Technology, demonstrates data on the content of heavy metals in the soil cover of the transient zone between the middle taiga and north taiga landscapes of Western Yakutia under the conditions of mining operations. The authors proposed new approaches to evaluation assesses the resistance of different types of soils to heavy metals pollution. The heavy metals content was determined by atomic absorption spectrometry. Among the studied pollutants the greatest tendency to binding by natural organic ligands was revealed for such elements as lead and copper. Zinc and nickel will actively migrate in the ionic form. Cadmium occupies an intermediate position in terms of the ratio of ionic and organically bound forms. The data presented in the study can be used in monitoring the state of the soil cover in the mining zone.

For more information, see the article:

📌 Titov A.S., Toropov A.S. Geoenvironmetal assessment of different types of cryolithic soils in Western Yakutia under the conditions of diamond-mining operations. Mining Science and Technology (Russia). 2024;9(2):170-182. https://doi.org/10.17073/2500-0632-2023-12-188

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#inenglish #MST #soil #heavymetals #pollution #cryolithic #WesternYakutia #diamond #mining #enterprises #geoecology #assessment #content #metals #cover #landscape #production #stability #analysis #spectrometry #modeling #structure #humus #migration #kimberlite #complex #geochemistry #thermodynamic #sample #horizon #zinc #nickel #cadmium #lead #copper #arsenic #mercury

How to improve power quality in variable-frequency drives for scraper conveyors?

🔌 Challenge:
Modern mines are actively implementing VFDs for scraper conveyors. However, this introduces voltage and current distortions, reducing energy efficiency and safety.

📊 Research:
Scientists from MISIS analyzed harmonic distortions in MPDS and evaluated the effectiveness of HFs, reactors, and SFs.

🔹 Key Findings:
✔️ HFs and reactors reduce harmonics upstream of the FC by 70–90%.
✔️ SFs mitigate distortions downstream of the FC but require precise tuning.
✔️ Harmonics in leakage circuits (especially 3rd, 5th, 7th) impact RCDs and personnel safety.
✔️ Combined use of HFs, reactors, and SFs delivers optimal results but needs technical-economic justification.

⚠️ Risks:
Higher harmonics in leakage circuits pose safety hazards and disrupt protective devices.

💡 Recommendations:
1️⃣ Deploy HFs and reactors to suppress harmonics upstream of the FC.
2️⃣ Carefully select SF parameters.
3️⃣ Account for harmonics when configuring RCDs.
4️⃣ Implement real-time power quality monitoring.

📌 Conclusion:
Enhancing power quality in VFD-driven scraper conveyors demands a holistic approach and adaptive protection systems.

For more information, see the article:

📌 Petrov V.L., Pichuev A.V. Assessing the efficiency of measures to enhance electric power quality in variable-frequency drive for scraper conveyors. Mining Science and Technology (Russia). 2024;9(1):60-69. https://doi.org/10.17073/2500-0632-2024-01-198

How do you address these challenges? Share your insights below!

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#InEnglish #MST #PowerEngineering #MiningTechnology #VFD #ElectricalSafety #PowerQuality #MPDS #HF #Reactor #SineFilter #RCD #Harmonics #Distortion #Voltage #Current #FrequencyConverter #AVI #PWM #UndergroundNetworks #EnergyEfficiency #Protection #Modeling #GOST #Insulation #Compensation #Filtration #MISIS #Research #PracticalSolutions

We present the articles of the first issue of scientific journal "Mining Science and Technology” (Russia) for 2025:

Scientists studied the effect of hydraulic excavator pump wear on fuel overconsumption. During operation, increased clearances, reduced volumetric efficiency, and higher energy losses lead to excessive fuel consumption. The research aimed to determine the optimal pump service life considering growing fuel costs. The team developed a mathematical model of pump ownership costs, created simulation algorithms in Simulink-Matlab, and evaluated fuel consumption increases. Using the Komatsu PC2000-8 excavator as an example, the study demonstrated how main hydraulic pumps' technical condition affects fuel overconsumption. The results established correlations between fuel overconsumption and pump wear, plus derived an equation for optimal replacement timing to minimize total costs. The proposed fuel overconsumption indicator (calculated as the ratio between actual and nominal fuel consumption per 1 m³ of excavated material) enables data-driven determination of pumps' critical wear threshold. Implementation of this model can reduce combined pump ownership and fuel costs by up to 17%, accounting for pump condition deterioration rate, fuel prices, replacement costs, and mining-engineering conditions. All simulations were performed using Simulink-Matlab and Excel with specially developed calculation methodologies.

For more information, see the article:

📌 Rakhutin M.G., Tran V.H., Krivenko A.E., Giang Q.Kh. Impact of the technical condition of main pumps on fuel consumption in a hydraulic excavator. Mining Science and Technology (Russia). 2025;10(1):67-74. https://doi.org/10.17073/2500-0632-2024-01-179


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#InEnglish #MST #MiningMachinery #HydraulicMiningExcavator #PumpTechnicalCondition #Hydraulics #Pump #Condition #Operation #Modeling #Leakage #Efficiency #Wear #Costs #Algorithm #Consumption #Overconsumption #OptimalServiceLife #Excavator #Pumps #ServiceLife #TechnicalCondition #Mining

How to determine the deformation modulus and anisotropy in blocky rock masses?

🔹 In a study published in Mining Science and Technology (Russia), the authors investigated the anisotropic behavior of blocky rock masses. They employed the discrete element method to model and analyze the deformation modulus as a function of loading direction, joint properties, and intact rock characteristics.

🔹 Key Findings:
✔️ The deformation modulus depends on the Joint Roughness Coefficient (JRC) and the Uniaxial Compressive Strength (UCS) of the intact rock.
✔️ The influence of joint roughness on the deformation modulus is three times greater than that of intact rock strength.
✔️ The degree of anisotropy in the deformation modulus ranged from 1.6 ≤ Rₑ ≤ 2.5, with an average value of 1.88.
✔️ During joint sliding failure, the yield strain (0.2–0.4) is independent of the loading angle (θ) and the orientation of the third joint set (α).

🔹 Practical Applications:
The results enable the prediction of rock mass behavior without costly field tests, which is crucial for designing tunnels, boreholes, and other geotechnical structures.

Read the full study in Mining Science and Technology (Russia):

📌 Ahrami O., Javaheri Koupaei H., Ahangari K. Determination of deformation modulus and characterization of anisotropic behavior of blocky rock masses. Mining Science and Technology (Russia). 2024;9(2):116–133. https://doi.org/10.17073/2500-0632-2023-08-143

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#InEnglish #MST #anisotropy #deformation #modulus #mass #rocks #loading #fracture #stiffness #strength #shear #resistance #stress #displacement #sliding #quartz #modeling #coefficient #index #blocks #deformations #material #surface #structure #boundary #experiment #geomechanics #JRC #UCS #GSI #simulation

🔥 Coming soon: new issue of "Mining Science and Technology" Journal!

📅 Expert analysis, innovations, and practical case studies – coming soon!"

This issue features:

📌 Talgamer B. L., Meshkov I. A., Murzin N. V., Roslavtseva Yu. G. Justification of the optimal width of a front bank;
📌 Sekerina D. D., Saitgaleev M. M., Senchina N. P., et al. Role of strike-slips and graben-rifts in controlling oil and gas reservoirs in deep horizons of the Russko-Chaselsky Ridge (West Siberian Province);
📌 Boyarko G. Y., Bolsunovskaya L. M. Mineral resource base of Russia’s cobalt: current state and development prospects;
📌 Indrupskiy I. M., Sukhinina E. A., Alekseeva Yu. V. Analysis of the mechanism of cyclic geomechanical treatment to increase well productivity in carbonate reservoirs;
📌 Rastanina N. K., Golubev D. A., Perfiliev A. V., et al. Assessment of the elemental status of the young population in Solnechny, Khabarovsk krai, as part of mining environmental monitoring;
📌 Ovchinnikov N. P. Reducing mine water contamination at the local drainage facility of a kimberlite mine;
📌 Yurak V. V., Ignatyeva M. N., Komarova O. G. Economic incentive instruments for the development of technogenic deposits.

📅 The issue will be released in the coming days!

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#InEnglish #MST #Issue #MiningTech #Extraction #Mineralogy #Geoecology #SeismicSurvey #Geomechanics #Modeling #StrategicResources #Cobalt #OreDeposits #Ecology #Pollution #WaterTreatment #LandReclamation #WestSiberia #KhabarovskKrai #RussianScience #MiningEconomics #PPP

How to Assess Rock Mass Stability at Deep Mine Levels?

Geomechanical rating classifications are key tools for designing underground mining operations. A new study presents a detailed assessment of rock mass conditions at deep levels of the Udachny mine using RMR and Q systems.

🔹 Key Findings from the Study:
• RMR: Range of 32–62 at Q = 1, median values:
o kimberlites of the Zapadny Ore Body (ZOB) — Class III stability;
o kimberlites of the Vostochny Ore Body (VOB) — Class IV;
o host rocks — Class II (average RMR = 54).
• Q-Index: Logarithmic range of 0.18–105.6, median values:
o VOB — Class D (poor condition);
o ZOB — Class C (fair condition);
o Host rocks — Class B (Q ~ 4–10).
• Rock Strength (UCS):
o kimberlites: 2.15–119.48 MPa (variability due to heterogeneous composition)
o host sediments: 28.14–71.73 MPa (average: 41.05 MPa)
• Jointing:
o host rocks — Class I (monolithic, >2 m spacing);
o ZOB — Class III (0.5–1 m spacing);
o VOB — Class IV (0.1–0.5 m spacing).

🔹 Practical Recommendations:
• for permanent workings: rockbolting (2 m length, 1–4 m spacing) with 5–6 cm shotcrete;
• for excavation junctions: reinforced support (2.5 m rockbolts, 9–12 cm shotcrete);
• moderate correlation between RMR and Q due to differing parameter sensitivities (e.g., RMR ignores rockbursts, Q omits strength).

The study highlights the need for integrated approaches: ratings require continuous updates as mining progresses.

📌 Read the full paper:
Serebryakov E.V., Zaytsev I.A., Potaka A.A. Assessment of rating parameters of the rock mass conditions at Udachny underground mine deep levels. Mining Science and Technology (Russia). 2024;9(3):206-220. https://doi.org/10.17073/2500-0632-2023-12-192

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#InEnglish #MST #RatingClassification #RMR #Q #UdachnayaKimberlitePipe #Televiewer #Jointing #RockMassStability #Support #Geomechanics #RockProperties #Drilling #CoreLogging #Rockbolts #Shotcrete #Depth #Mapping #Stress #Modeling