一级a看免费视频播放软件_91qv视频在线观看_亚洲国产精品爽爽爽_中文字幕亚洲字幕一区二区_免费黄色美女网站_粉色abb苏州粉色晶体_国产主播强奸按摩毛片_国产在线精品17p_原来神马影院手机版免费_亚洲另类精品变态在线观看

It is the first large deep mine with the mining depth exceeding a kilometer in China, and is characterized by deep shaft, high stress, high temperature, high pressure large inflow, high sulfur content, complex and difficult-to-beneficiate ores, rockburst trend, etc. The mine has a construction capacity of 13,000 t/d, and was completed at the end of 2004. Sublevel open stoping with backfilling method, main shaft - auxiliary shaft - service shaft development, consolidated filling of total tailings and waste, large-capacity semi-autogenous mill + ball mill process are adopted.

China ENFI is the first to apply large-capacity consolidated filling of total tailings process and to use large-capacity semi-autogenous mill + ball mill process in China. Thus, Dongguashan Copper Mine becomes a modern large-capacity deep mine integrating efficient mining, earth pressure and rockburst monitoring, large-capacity double skip hoisting and large-capacity side-bottom dumping truck transportation. ENFI undertakes the design of continued deep construction project.