Mercury has surface and underground mining in two ways. China is mainly underground mining. At present, it is mainly used to mine shallow deposits, and there are many projects that are jointly developed by Pingshuo, inclined wells and blind and inclined wells. The use of formal shaft of the mine, only Guizhou Renhe mercury mercury and copper. The mining method of mercury mines adopts the mining and mining method and the medium-deep hole caving mining method with bottom structure according to the occurrence of mercury deposits in China and the different characteristics of ore body shape and occurrence. The pneumatic rock-type YT-30 or 7655 rock drill is generally used for pneumatic rock drilling and shallow hole rock drilling , and the YGZ-90 rock drill is used for medium-deep hole mining. The mining site is generally powered by electric picks, and also has a pneumatic rubber wheel T2G loader. The mining capacity is 60-150t/(Taiwan/Class), and the latter is 100-180/(Taiwan/Class) when the transportation distance is less than 30m. The national mine operation volume (in 1996, it basically represented the situation in the 1990s): the total amount of mining and stripping was 84,000 tons, of which the mining volume was 63,000 tons (pit mining), the excavation volume was 21,000 tons, the excavation was 0.3 m, and the mining volume was 72,000 tons.
Development and mining methods and design scale and capabilities of typical mercury mines:
Guizhou mercury mine is located in Wanshan Special Zone, Tongren, eastern Guizhou Province. Mercury mines are very large ore fields. The mines currently being mined mainly include Chinese fir Dong, Zhangjiawan, Heizizi, Lengfengyu, Yanshanba and Yanwuping. The ore bodies in each mining area are not deep, and there are flat, inclined wells and shafts in each pit. The empty field mining method is mainly used. The mined amount is 330,000 t/a, and the ore dressing capacity is 180,000 t/a.
The Wuchuan Mercury Mine is located in the Daping District of Wuchuan County, Guizhou Province. It has a large mercury deposit and has two pits. The first and second pits are all developed by Pingyi. The mining method is the room-column method, the comprehensive method, and the mesoporous segmentation method. The mined amount is 64,000 t/a, and the ore dressing capacity is 66,000 t/a.
Xinhuang mercury mine is divided into old and new districts. The old district refers to the Xinhuang Hotel Tang mining area (closed pit in 1978), located 6km west of Xinhuang County, Hunan Province; the new district refers to the Hunan Fenghuang Chatian mining area, located 39km west of Fenghuang County, bordering Guizhou. The old area is a medium-sized deposit, and the Chatian mining area in the new area is a large deposit. The old district is open for inclined wells, the new tea field is open to Pingyi, and the cold water bay area is open for inclined wells. The mining method uses the empty field method. The mined amount is 40,000 t/a, and the ore dressing capacity is 40,000 t/a.
Magnolia mercury mine, which belongs to Guangxi Dachang Mining Bureau, is located in the west of Danxian County, southwest of Guangxi, about 81km from the Dachang Mining Bureau, a medium-sized deposit. A single flat plaque is used to develop a peaceful 窿-blind inclined well joint development. The mining method uses the ordinary retention method and the stratified caving method, and a few ore blocks apply the comprehensive method. The mined amount is 50t/d, and the ore dressing capacity is 15,000t/a.
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