Wind impact

WIND IMPACT WITHIN THE MINING CRAFT (EN: wind action; DE: Verwitterung, Windwirkung, Windangriff; FR: action eolienne; ES: accion eolica; RU: ветровое воздействие) causes the influence onto the built structures of the surface at the underground mines, of the open-pit mines, of the petroleum and gas productive fields, and onto the waste dump facilities; the wind impact has the special significance in case of the development of the marine deposits of the useful minerals.

The wind impact causes the deformation of the facilities, the dust flying of the useful minerals, of the waste rock dumps, and of the tailing storage facilities at the beneficiation plants, the spontaneous ignition of the coal and ores within the waste dumps, and so on. During the development of the underwater deposits, the wind impact leads to the forming of the roll, pitch, and rocking of the watercrafts, causes the disruption of the contact between the excavation tools and the stope, the deformation of these tools, the excessive inclination of the beneficiation apparatuses, with the decreasing of the effectiveness of their work. They evaluate the magnitude of the wind according to the Beaufort scale (the 12 points correspond to the speed of the wind of more than 32.7 metres per second); they determine the value of the heeling moment for the watercrafts according to the empirical dependence, or according to the results of the model tests for these installations within the wind tunnel. In case of the absence of the reliable statistical data about the wind, they calculate the watercrafts for the possibility of the works with the speed of the wind of 36 metres per sec ond, and they calculate the "survival" in case of the mooring during the windstorm with the speed of the wind of at least 51.5 metres per second.

For the decreasing of the influence of the wind impact onto the built structures (for example, onto the marine drilling installations), they design these structures with the least possible sail area, while for the prevention of the dust flying, and of the spontaneous ignition of the useful minerals, they introduce various substances, or they use the shelters. For the decreasing of the influence of the wind impact, they use the means for the calming of the rocking, and so on (see the "Wave impact" article).