Abstract
Research work on the air flow in mine workings frequently utilises computer techniques in the form of numeric simulations. However, it is very often necessary to apply simplifications when building a geometrical model. The assumption of constant model geometry on its entire length is one of the most frequent simplifications. This results in a substantial shortening of the geometrical model building process, and a concomitant shortening of the time of numerical computations; however, it is not known to what extent such simplifications worsen the accuracy of simulation results. The paper presents a new methodology that enables precise reproduction of the studied mine gallery and the obtaining of a satisfactory match between simulation results and in-situ measurements. It utilises the processing of data from laser scanning of a mine gallery, simultaneous multi-point measurements of the velocity field at selected gallery cross-sections, unique for mine conditions, and the SAS turbulence model, recently introduced to engineering analyses of flow issues.
Highlights
Measurement and Simulation of FlowProper operation of mine ventilation is one of the necessary conditions for the safe and effective functioning of underground mines
This paper presents the application of novel measuring and numerical modelling techniques, which allow one to achieve a satisfactory match between simulation results and measurement data
The paper presents a broad range of performed work aimed at the numerical modelling of turbulent air flow in a section of a mine gallery
Summary
Proper operation of mine ventilation is one of the necessary conditions for the safe and effective functioning of underground mines. More recent work refers to similar supports, but in roadways of rectangular shape [5] Despite the above-mentioned solutions, for many cases, the issues of numerical modelling of flow effects in mines encounter numerous problems, which so far have not been resolved to a satisfactory degree They result inter alia from the vastness of such ventilation systems, frequently comprising hundreds of kilometers of workings with complicated and irregular shapes. This paper presents the application of novel measuring and numerical modelling techniques, which allow one to achieve a satisfactory match between simulation results and measurement data They were applied to a section of a gallery with a shape and environmental conditions representative of Polish coal mines. The latter, described in [12] has turned out to provide remarkably better fit to the experimental data the alternative
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