How to control the gas hazard pattern in underground workings after blasting?

Determining the sources of hazardous and toxic substances released into mine air, their gas composition, as well as providing each such source of pollution with the required amount of fresh air are important issues in terms of ensuring normal healthy and safe working conditions for miners. An article published in the journal "Mining Science and Technology" established the time-dependent changes in toxic gas concentrations after blasting, specifically at the working face, in the return ventilation current, and near the booster. In order to assess the reliability of the data obtained, the volume of released carbon oxides was calculated based on the data of gas analyzers and chemical reactions of explosives decomposition during detonation, depending on the types and weights of the explosives.

For more information, see the article:

📌 Olkhovskiy D.V., Parshakov O.S., Bublik S.A. Study of gas hazard pattern in underground workings after blasting. Mining Science and Technology (Russia). 2023;8(1):47-58. https://doi.org/10.17073/2500-0632-2022-08-86

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

📅 In the coming days, you'll discover fresh research, innovative technologies, and the latest trends in the mining industry.

This issue features:

📌 Voznesenskii A. S., Ushakov E. I., Kutkin Ya. O. Fracture toughness of rock-concrete interfaces and its prediction based on acoustic properties.
📌 Shilova T. V., Serdyukov S. V., Drobchik A. N. Experimental research of stress-strain properties of sandy soil when strengthened with polyurethane compounds.
📌 Starikov A. N., Maltsev S. V., Sukhanov A. E. Influence of the sorption properties of potash salts on the gas environment in dead-end mine workings.
📌 Chernyi K. А., Faynburg G. Z. Evaluation of variation of salt dust hygroscopic aerosol particle size as a function of relative air humidity.
📌 Mirzaeva E. I., Isaeva N. F., Yalgashev E. Ya., Turdiyeva D. P., Boymonov R. M. Preparation of adsorbents for the extraction of heavy metals from mining wastewater.
📌 Kotelnikova A. L., Zolotova E. S. Material composition of magnetic fractions of copper-smelting slag flotation tailings.
📌 Rakhutin M. G., Tran V. H., Krivenko A. V., Giang Q. Kh. Impact of the technical condition of main pumps on fuel consumption in a hydraulic excavator.
📌 Malafeev S. I., Malafeeva A. A., Konyashin V. I., Novgorodov A. A. Mechatronic system for running-in and testing of mechanical transmissions in mining shovels.
📌 Klyuev R. V. Assessment of energy efficiency improvement strategies for ventilation and hoisting systems during the reconstruction of the Molibden mine.

📅 The issue will be released in the coming days!

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#InEnglish #MST #RockMechanics #Concrete #FractureToughness #Acoustics #SoilMechanics #Strength #Polyurethane #Mine #Ventilation #Methane #Safety #Aerosol #Ecology #HeavyMetals #Adsorption #WasteUtilization #Excavator #Hydraulics #EnergyEfficiency #Mining

A new issue of Mining Science and Technology has been published! 🎉

Volume 1, 2025 of Mining Science and Technology is now available!

The complete table of contents can be accessed here:
👉 https://mst.misis.ru/jour/issue/view/42/showToc

Featured in this issue:

1️⃣ Voznesenskii А.S., Ushakov E.I., Kutkin Ya.O. Fracture toughness of rock-concrete interfaces and its prediction based on acoustic properties. Mining Science and Technology (Russia). 2025;10(1):5-14. https://doi.org/10.17073/2500-0632-2024-10-316
Full article

2️⃣ Shilova T.V., Serdyukov S.V., Drobchik A.N. Experimental research of stress-strain properties of sandy soil when strengthened with polyurethane compounds. Mining Science and Technology (Russia). Mining Science and Technology (Russia). 2025;10(1):15-24. https://doi.org/10.17073/2500-0632-2024-08-303
Full article

3️⃣ Starikov A.N., Maltsev S.V., Sukhanov A.E. Influence of the sorption properties of potash salts on the gas environment in dead-end mine workings. Mining Science and Technology (Russia). 2025;10(1):25-33. https://doi.org/10.17073/2500-0632-2024-01-210
Full article

4️⃣ Chernyi K.A., Faynburg G.Z. Evaluation of variation of salt dust hygroscopic aerosol particle size as a function of relative air humidity. Mining Science and Technology (Russia). 2025;10(1):34-44. https://doi.org/10.17073/2500-0632-2024-07-283
Full article

5️⃣ Mirzaeva E.N., Isaeva N.F., Yalgashev E.Ya., et al. Preparation of adsorbents for the extraction of heavy metals from mining wastewater. Mining Science and Technology (Russia). 2025;10(1):45-55. https://doi.org/10.17073/2500-0632-2024-02-224
Full article

6️⃣ Kotelnikova А.L., Zolotova E.S. Material composition of magnetic fractions of copper-smelting slag flotation tailings. Mining Science and Technology (Russia). 2025;10(1):56-66. https://doi.org/10.17073/2500-0632-2023-08-142
Full article

7️⃣ 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
Full article

8️⃣ Malafeev S.I., Malafeeva A.A., Konyashin V.I., Novgorodov A.A. Mechatronic system for running-in and testing of mechanical transmissions in mining shovels. Mining Science and Technology (Russia). 2025;10(1):75-83. https://doi.org/10.17073/2500-0632-2024-05-262
Full article

9️⃣ Klyuev R.V. Assessment of energy efficiency improvement strategies for ventilation and hoisting systems during the reconstruction of the Molibden mine. Mining Science and Technology (Russia). 2025;10(1):84-94. https://doi.org/10.17073/2500-0632-2024-10-362
Full article

🔗 All articles are freely available in open access!

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#InEnglish #MST #RockMechanics #Concrete #FractureToughness #Acoustics #SoilMechanics #Strength #Polyurethane #Mine #Ventilation #Methane #Safety #Aerosol #Ecology #HeavyMetals #Adsorption #WasteUtilization #Excavator #Hydraulics #EnergyEfficiency #Mining

❓ Can the setback distance of a mine ventilation duct be increased without losing efficiency?

New research has proven: even with a 21-meter setback from the working face, the air jet maintains its effectiveness, fully ventilating the dead-end drift.

🔹 Key findings:

✔️ Experiments conducted in an actual 29.2 m² cross-section drift with five setback variants (10-21 m)
✔️ 21.75 m/s jet velocity ensured proper ventilation even at maximum distance
✔️ Results verified through computer modeling
✔️ Derived equation correlates face velocity with drift geometry

🔹 Why it matters:

The discovery allows safely increasing duct setback to 20m for large cross-section drifts, simplifying mining operations.

For more information, see the article:

📌 Kamenskikh A.A., Faynburg G.Z., Semin M.A., Tatsiy A.V. Experimental study on forced ventilation in dead-end mine working with various setbacks of the ventilation pipeline from the working face. Mining Science and Technology (Russia). 2024;9(1):41-52. https://doi.org/10.17073/2500-0632-2023-08-147


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#InEnglish #MST #MineVentilation #DeadEndFace #ForcedVentilation #VentilationDuctSetback #FieldExperiment #NumericalSimulation #AirflowPatterns #MiningTechnology #MiningSafety #Mining #Ventilation #Safety #DeadEnd #Airflow #FieldStudy #NumericalModeling #JetFlow #Turbulence #MineSafety #ForcedVentilation #Pipeline #CrossSection #Velocity #Vortex #StagnantZone #ANSYS #CFD #Regulations #Research #Engineering

How to Optimize Ventilation in Mines Using Diesel Equipment?

🔹 Problem: Modern mines utilize high-power diesel equipment, significantly increasing ventilation load. Traditional airflow calculation methods overestimate requirements by 50%, leading to substantial costs.

🔹 Solution: Researchers developed a novel methodology based on field measurements of actual emissions and numerical simulation. This enables precise determination of airflow needed to dilute harmful substances to safe concentrations.

🔹 Key Results:
✅ Reduced ventilation costs through accurate emission accounting
✅ Optimized air distribution in mine workings
✅ 3.5× decrease in CO and NO₂ concentrations with proper ventilation

For more information, see the article:

📌 Senatorov V.A. Determining airflow requirements in mine workings based on field measurements of actual emissions from internal combustion engine equipment. Mining Science and Technology (Russia). 2024;9(1):53-59. https://doi.org/10.17073/2500-0632-2024-01-203

💡 Conclusion: Innovative calculation methods represent a breakthrough in cost efficiency and environmental safety for mining operations!

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

Scientists conducting research at the mines of the VVerkhnekamsk potassium-magnesium salt deposit (VPMSD) discovered an interesting pattern: gas-air surveys show that the volume of gaseous impurities in the main ventilation drifts is often significantly lower than in the working areas of dead-end workings. This phenomenon of decreasing gas concentrations along the ventilation airflow path is explained not only by the dilution of impurities due to fresh air leaks but also by the chemical neutralization of gases through interaction with the potash rock mass. Previously conducted laboratory studies confirmed the ability of sylvinite (NaCl + KCl) to absorb toxic and combustible gases. This paper presents the results of field studies at one of the VPMSD mines, where the dynamics of gas impurities in the workings were studied, taking into account both chemical processes and ventilation factors. Specialists measured the concentration of combustible and toxic gases in seams of different mineral compositions and analyzed the influence of potash salt properties on the gas composition in long dead-end workings. Laboratory analysis of the collected air samples, performed by chromatographic method using the "CHROMOS GH-1000" instrument, made it possible to quantitatively assess the contribution of gas neutralization and dilution processes to the reduction of harmful impurity concentrations. The results showed that in long dead-end workings of seam AB (100 m or more), the content of gaseous impurities consistently decreases as the distance from the dead end to the mouth of the working increases. The study also examined other factors influencing changes in the gas composition in mine workings.

For more information, see the article:

📌 Starikov A.N., Maltsev S.V., Sukhanov A.E. Influence of the sorption properties of potash salts on the gas environment in dead-end mine workings. Mining Science and Technology (Russia). 2025;10(1):25-33. https://doi.org/10.17073/2500-0632-2024-01-210

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

Scientists have determined how relative air humidity affects the size of hygroscopic salt dust aerosols – a key factor in addressing ventilation challenges in potash mines. With the expansion of mining operations, the issue of fresh air shortages in mines has become critical. Traditional ventilation methods are no longer sufficient, giving way to recirculation and "ventilation on demand" systems. However, their effective operation requires a precise understanding of how salt dust behaves in a humid atmosphere. When rock is fractured, it generates NaCl and KCl aerosols, which absorb moisture, increase in size, and settle. Accurate models are needed to predict their dispersion. Researchers studied the mechanisms of hygroscopic growth, hysteresis, deliquescence, and recrystallization of salt particles. Due to the challenges of conducting experiments in mines, data on oceanic aerosols of the same composition were used. These models were adapted to mine conditions, yielding average values for the hygroscopic growth factor of salt dust. Remarkably, the particle growth dynamics in mines and over the ocean were found to be very similar! To predict changes in aerosol size, Young's model was proposed, which effectively describes the process in log-log coordinates. These findings will help improve dust condition calculations in salt and potash mines, enhancing ventilation systems and miner safety.

For more information, see the article:

📌 Chernyi K.A., Faynburg G.Z. Evaluation of variation of salt dust hygroscopic aerosol particle size as a function of relative air humidity. Mining Science and Technology (Russia). 2025;10(1):34-44. https://doi.org/10.17073/2500-0632-2024-07-283

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

Scientists have analyzed energy efficiency of mining operations, focusing on ventilation fans and hoisting machines as the most energy-intensive equipment. The study examines main ventilation fans and hoisting systems at Molibden mine, proposing optimization measures to improve efficiency and reduce costs. Research methods included analytical approaches for ventilation system evaluation. Findings show inefficient fan operation with excessive energy use, suggesting motor replacement could save 4.9 million rubles annually. Analysis of hoisting equipment recommends modern multi-rope systems for better performance. Data reveals inverse correlation between productivity and energy use - 10–15% output increase reduces energy consumption by 2–5%. Implementing automated controls and optimizing equipment utilization can significantly enhance efficiency. These results are applicable to other deep mining operations.

For more information, see the article:

📌 Klyuev R.V. Assessment of energy efficiency improvement strategies for ventilation and hoisting systems during the reconstruction of the Molibden mine. Mining Science and Technology (Russia). 2025;10(1):84–94. https://doi.org/10.17073/2500-0632-2024-10-362

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