In China's antimony mining, the vast majority of mines are underground mining, and open-pit mining is rare. Only a few mines are first open-pit mining and then transferred to underground mining, such as Yunnan Muli Mine.
Underground mining is mainly based on shafts, but some also use inclined wells, flats and joint development. If China's large-scale mining of antimony tin mine Bureau of Mines southern and northern antimony ore mining were to spend disk shaft development. Underground transportation, lifting, ventilation, drainage and other systems are relatively complete. Yunnan Muli Antimony ore, antimony gold ore Hunan Longshan adit is used to develop the system. Hunan Xiangxi (Woxi) 锑Golden-tungsten mine adopts a joint development system combining inclined wells and shafts.
Underground mining methods, each mine uses its own mining method according to the geological conditions of the deposit, the ore body shape and shape. For example, Hunan Tin Mine is a cement filling method and a pole top filling mortar filling method. Guizhou Qinglong antimony mine, the comprehensive mining method of leaving irregular ore pillars. Guangxi Dachang Changpo Mine, segmental empty field method, retention method. Before the end of the 1970s, the Muli antimony mine in Yunnan was a small open-pit mining method, which was transferred from the early 1980s to the low-segmentation method without bottom pillar. Hunan Xiangxi (Woxi) 锑 gold-tungsten mine is a wall-filling method and a room-column method. The Longshanyu gold deposit in Hunan Province is a shallow hole retention method for artificial bottom columns.
At present, the amount of state-owned mine operations: in 1996, the total amount of mining and stripping was 1.374 million tons, and the amount of ore mined was 972,000 tons. The mining grade is 2.31%, the mining loss rate is 12.53%, the ore depletion rate is 11.16%, the mining and mining ratio is 390.14m/million, the mining work efficiency is 12.63t/work shift, and the worker physical labor productivity is 328.12t/(person • a).
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