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The largest gypsum minefield in the Europe by hxjq wang





Article Author Biography
The largest gypsum minefield in the Europe by
Article Posted: 06/28/2012
Article Views: 59
Articles Written: 1204
Word Count: 426
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The largest gypsum minefield in the Europe


 
Business

Have you ever thought that a huge mine the size of which exceeds the area of the Moscow subway system can be located right under your feet? Such a mine, which is the largest gypsum minefield in Europe, is situated in the city of Novomoskovsk in the Tula region.
Size of its minefields and chambers just boggles the mind. Gypsum deposit was discovered in Novomoskovsk in 1929.
A mine can be entered through the cage that seems rather undistinguished. Before the descent every person is supplied with a protective suit, helmet and shoes. As well as with a separate lamp and oxygen device that has to be used in case of emergency. Gypsum extraction is carried out at the depth of 130 meters. The mine has 5 shafts in total. They are used to take down people and equipment, provide ventilation and elevate obtained raw material.
The first shaft was built in 1947. That time gypsum was transported only with a wagon. Diesel transport was the next stage of evolution. Now gypsum is carried by trucks, belt conveyors and raw material is elevated with the help of special conveyor. Main tunnels are supplied with lamps. Total length of the tunnel is over 500 km. Having an underground parking lot is a must. As the quarry is rather solid there is no need to strengthen the walls of the tunnels.
Stages of a technological process include drilling with special setup, loading of blasting agents, face firing, aeration, filling trucks with gypsum with its subsequent transportation, shattering, lifting shattered stone to the surface and loading products to railway vehicles.
Gypsum stone is very solid and can’t be obtained with a regular excavator and impact crusher. It requires well drilling and loading with blasting agents. 6 large wells are drilled along the center of the chamber. They are not loaded but create a compensating surface. Manual labor was eliminated in 2000. Hole-drilling is done with the help of a device called Smaq BW 50. After explosion dust is settled, windy shots are checked and then gypsum is loaded into trucks. Every part of the equipment is also repaired underground. Total carrying capacity of the machines is 900 tones of stone an hour. Controlling the technological process of underground shattering. Reversible conveyer of the gate-end bunker. The mine in Novomoskovsk gives one third of the total gypsum produced in KNAUF enterprises located in the CIS countries

Belt conveyor : http://www.hxjqcrusher.com/crusher/Ore-separating-line.html
Vibrating grizzly feeder : http://www.china-crusher.com/vibrating-feeder1.html
 

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