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一、概述我矿是地下开采的石棉矿山,采用尾矿干式充填采矿法,平均年产矿石量为××万吨。矿体为急倾斜(倾角55～75°)白云质灰岩,f=8～10。采矿中段高50米,其溜井斜长52.8米,倾角为62°。矿石体重2.59吨/米~3、松散比重1.6吨/米~3、松散系数1.62、自然安息角38°、品位4.29%、块度小于800毫米、含水量6～10%。用电耙把崩落在回采工作面的矿石耙至采场集中放矿溜井。采场生产能力通常为62.9吨/日。一个溜井使用期为5～6个月,放矿总量一般在8000～
First, an overview of mine is underground mining of asbestos mines, tailings dry-filling mining method, with an average annual output of × × tons of ore. The ore body is steep (55 ~ 75 ° inclination) dolomitic limestone, f = 8 ~ 10. The middle section of the mining area is 50 meters high. The inclined well is inclined 52.8 meters long and has a dip angle of 62 degrees. Ore weight 2.59 tons / m ~ 3, the proportion of loose 1.6 tons / m ~ 3, loose coefficient 1.62, natural rest angle 38 °, grade 4.29%, block size less than 800 mm, water content 6 to 10%. Electric rake to fall in the mining face of the ore rake to the stope focus on the ore tapping. Stope production capacity is usually 62.9 tons / day. A chute life of 5 to 6 months, the total amount of ore generally 8000 ~