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

The performed study allowed to develop a model of hyperbolic time-distance curve of GPR impulses reflected from a local feature located in a rock mass with an arbitrary number of layers. Practical application of the obtained results in studies aimed at automated determination of electrophysical properties of rocks and soils by hyperbolic time-distance curves will allow to create a database with up-to-date information on dielectric permittivity of rocks.

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🔥 Sokolov K.О. Model of time-distance curve of electromagnetic waves diffracted on a local feature in the georadar study of permafrost zone rock layers. Mining Science and Technology (Russia). 2024;9(3):199-205. https://doi.org/10.17073/2500-0632-2023-05-118 🔥

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#inenglish #MST #model #rock_mass #rock #dielectric_permittivity #velocity #hyperbola #layer #georadar #permafrost_zone #gprMax

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

The resulting model can be used for general analysis of operability and stability, as well as for verifying the correct selection of key elements in the design of sucker-rod pump unit systems with variable frequency drives.

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📌 Ershov M.S., Efimov E.S. Stability of a controlled sucker-rod pump unit drive under operating conditions and during voltage dips in the electrical network. Mining Science and Technology (Russia). 2024;9(3):292-303. https://doi.org/10.17073/2500-0632-2024-01-213

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#inenglish #MST #pump #drive #control #voltage #frequency #brake #mode #energy #network #generator #current #torque #power #speed #rectifier #inverter #battery #signal #model #Matlab #Simulink #algorithm #emergency #protection #recovery #compensation #load #fluctuations #stability

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.

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📌 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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#inenglish #MST #working #gas #blasting #mine #ventilation #toxic #gasdistribution #monitoring #dispersion #atmosphere #face #mixture #data #measurement #concentration #mouth #fan #flow #air #carbonoxides #gasanalyzer #model #dispersion #dependence #pipeline

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.

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📌 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