❓ 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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👉 t.iss.one/MinSciTech 👈
#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
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
Subscribe to our Telegram channel:
👉 t.iss.one/MinSciTech 👈
#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
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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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👉 t.iss.one/MinSciTech 👈
#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
🔌 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!
Subscribe to our Telegram channel:
👉 t.iss.one/MinSciTech 👈
#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
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