Janusz Kruczkowski

Janusz Kruczkowski
Polish Academy of Sciences | PAN

About

14
Publications
912
Reads
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25
Citations
Citations since 2017
5 Research Items
20 Citations
201720182019202020212022202301234567
201720182019202020212022202301234567
201720182019202020212022202301234567
201720182019202020212022202301234567

Publications

Publications (14)
Article
Full-text available
Human activity causes transformations in the near-surface layers of the rock mass, which result in long-term impacts on buildings and engineering infrastructure. Mining activities are particularly disadvantageous in this context, as they trigger severe deformation processes that reach the soil surface as a result of the excavation of deposits. The...
Article
Full-text available
The paper presents the procedure and results of monitoring conducted by using a 3D measurement model, taking advantage of integrated surveying technologies developed for a building located within an activated landslide area. Geodynamic interactions within the building have resulted in a spatial deformation condition, leading to significant cracks o...
Chapter
In this article, the results of methane flow measurements were presented. Methane content was measured using newly designed, innovative measuring instruments. The devices make measurements simultaneously and quasi-point. The instruments are prepared to measure methane concentration and air velocity in deep coal mines. The article describes both the...
Article
Full-text available
The article presents discussion of measuring methods used in coal mining near longwall area. This discussion was reduced to quantities such as air velocity, pressure and methane concentration. In the result was proposed new solution of metrological stationary system which can be applied to measurements of physicochemical parameters of air in longwa...
Article
Full-text available
This paper presents a new stationary device that can perform simultaneous measurements of air flow velocity and methane concentration in a mine heading (stationary methane anemometer). The test station is designed to use the instrument to test the effect of various parameters on the air-methane stream. The air velocities and methane concentrations...
Article
Full-text available
Artykuł przedstawia wyniki eksperymentalnych pomiarów metanowości wentylacyjnej w chodniku nadścianowym. Wykorzystano nowo opracowane w IMG PAN stacjonarne urządzenie pomiarowe o nazwie metanoanemometr. Metanoanemometr jest układem hybrydowym umożliwiającym jednoczesne pomiary prędkości przepływu powietrza i stężenia metanu. Na ich podstawie wylicz...
Article
This article presents the calibration of a system for measuring air flow velocity in a wind tunnel with a multiple-hole orifice. The comparative method was applied for the calibration. The method consists in equalising the air flow velocity in a test section of the tunnel with that of the hot-wire anemometer probe which should then read zero value....
Article
Full-text available
Wyznaczanie bezwzględnej metanowości wentylacyjnej jest istotnym, dla bezpieczeństwa załogi, działaniem służb wentylacyjnych kopalni. Najczęściej stosowana metoda polega na wykorzystaniu danych ze stacjonarnych mierników stężenia metanu lub z prób pipetowych i wyników ręcznego pomiaru wielkości prędkości średniej w przekroju wyrobiska. Metoda obarc...
Article
Full-text available
The article presents the measurement results of a time-variable volumetric air flow rate flowing inside the inlet duct of a main ventilation fan. In situ research was carried out using the multi-spot flow velocity field measurement system in mine workings (SWPPP), which provides wireless measuring data transmission from anemometric sensors to the r...
Article
The process of measuring unsteady air flow in a deep mine's working is a difficult and complicated measuring issue, not solved satisfactory so far. The paper concerns a system for air flow velocity measuring by the method of velocity field, based on integrating the velocity on working's cross-section. Application of multiple anemometrical sensors,...
Article
Full-text available
The present article sets forward the results of tests that made it possible to validate the mathematical model used in the VENTGRAPH ventilation engineer programmes. The case considered relates to the introduction of new headings to the ventilation network of of a mine. The utilisation of computer programmes in practice is justified by the necessit...
Article
The present article sets forward the results of field tests that made it possible to validate the mathematical model used in the VENTGRAPH ventilation engineer programmes. The case considered relates to the introduction of a new heading to the ventilation network of the mine. The utilisation of computer programmes in practice is justified by the ne...

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