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

Scientists investigated a novel method for reinforcing sandy soils using polyurethane compounds. During construction of engineering structures and mineral deposit development, strengthening loose rock formations often becomes necessary, yet conventional polymer reinforcement techniques provide insufficient strength. Experimental studies introduced a two-solution treatment technology: initial mixing of sand with a slow-reacting highly elastic compound followed by addition of 5% rapid-curing single-component resin. Triaxial compression tests demonstrated that this approach creates cured polymer aggregates that bind mineral grains without complete void filling, increasing sand strength by 5-fold. The resulting geomaterial exhibits superior deformation resistance under axial stress, while maintaining strength independence from rapid-curing additives when the resin-to-rock volume ratio exceeds 0.3. The research confirms that the dual-solution method significantly enhances soil stability even with minimal polymer consumption, offering important practical applications for construction and mining operations.

For more information, see the article:

📌 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). 2025;10(1):15-24. https://doi.org/10.17073/2500-0632-2024-08-303


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#InEnglish #MST #soil #sand #properties #strength #strengthening #technology #treatment #polyurethane #resin #geomaterial #testing #triaxial #compression #failure #strain #geotech #engineering #construction #polymer #stabilization #research #experiment #materialscience #groundimprovement #geomechanics #durability #elasticity #SEM #microstructure #geotechnical #civilengineering

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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#InEnglish #MST #halite #sylvine #sylvinite #potashmine #saltdust #aerosolparticles #sizedistribution #hygroscopicgrowthfactor #ventilation #safety #atmosphere #dissolution #crystallization #model #humidity #NaCl #KCl #mining #particles #growth #diameter #theory #experiment #research #science #technology #dust #air #water #surface #process #data #analysis #study #results #YoungModel #speleotherapy #minerals #physics #chemistry #engineering #environment #health