Filling mining method for continuous backstoping of gently inclined parallel medium thick ore body group
A backfill mining method, inclined-parallel technology, applied in the fields of backfill, ground mining, mining equipment, etc., can solve the problems of difficulty in realizing the separation of two kinds of ores and waste rock, small mining ratio, and small dilution loss.
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[0033] Take the Laohudong Phosphate Mine of Guizhou Lvzhilin Laohudong Phosphate Mine Development Co., Ltd. as an example.
[0034] The Laohudong Phosphate Mine is located in the groundwater enrichment area of the entire dolomite anticline, and the roof of the mine is the main aquifer in the mining area. The Yangen River on the surface flows through the mining area from south to north, and mines deposits under the water body. Within the mining area, there are 111b / 331+122b / 332+333 ores of 364,647kt, with an average grade of P 2 O 5 25.95%. The ore body is a gently sloping medium-thick ore body, and the main occurrence elevation is 0m~800m. The ore body consists of two layers. The upper layer is the b ore layer with a dip angle of 15.2o and an average thickness of 9.13m. It is a calcium-magnesium phosphate rock ore, which is suitable for the manufacture of ordinary phosphate fertilizer or phosphoric acid; the lower layer is a ore layer with a dip angle of 15.2o and an aver...
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