In the mine, like in medicine, prevention is the best way of treatment. It means that it is easier to prevent an explosion than to fight with its consequences, which unfortunately turn sometimes into disasters. Explosion in coal mines happen, as a rule, because of accumulation of combustion agent - natural gas and/or slack - in the air underground. The natural gas and/or slack may explode spontaneously – simply because its concentration in the air has reached the critical value. To learn how much slack is accumulated in the coal mine will help the sensor developed by specialists of the Trapeznikov Institute of Management Problems, Russian Academy of Sciences, this institute is intended to invent various useful devices and management systems.
It should be noted that there are different ways to determine the quantity of accumulated dust, including that of slack. The easiest way is to pass a finger over a smooth surface, in the best case – over the varnished one. The method is demonstrative and tried by centuries, but it is not a quantitative one, and it would not work remotely. Instrument methods can be applied – for example, infrared sensors or piezoresonance sensors, which allow to solve the task accurately within micrograms, but they are unfortunately complicated, sometimes capricious and very expansive.
The sensor designed by the Muscovites ranks somewhere in the middle of the line. It meant that it promises to be sufficiently effective, i.e. automatic, quantitative and reliable, and at the same time simple and affordable, i.e. low-cost. It is called the radio-frequency sensor for quantity of accumulated slack.
Sergey Komarov | alfa
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