急倾斜薄矿脉在中国金属和非金属矿山较为常见.传统浅孔留矿采矿法具有生产效率低、安全性差等劣势.以青海山金矿业有限公司果洛龙洼矿区为工程背景,提出采用中深孔嗣后废石充填采矿法回采急倾斜薄矿体.选取Ⅱ-3840-4957,Ⅱ-3880-6165和Ⅱ-3880-52583个采场开展工业试验,试验采场矿石贫化率平均为44.67%,采矿损失率平均为5.67%,试验采场经济技术指标较好.因此,该开采工艺对于回采急倾斜薄矿体具有广阔的应用前景,值得推广.
Steeply inclined thin orebodies are commonly seen in metallic and non-metallic mines in China. Tradi-tional short-hole shrinkage methods have the disadvantages of low production efficiency and poor safety. Taking Guoluo-longwa Mining District in Guoluo Gold Deposit of Shanjin mining company as the engineering background,the medium long-hole blasting and waste rock filling method is proposed to extract steeply inclined thin orebodies. Industrial tests were carried out in 3 stopes,namelyⅡ-3840-4957,Ⅱ-3880-6165 andⅡ-3880-5258. The results show that the dilution rate in the trial stope is 44. 67% on average,and the loss rate is 5. 67%. The economic and technical in-dicators of this mining method are good. Thus the mining technology has wide application prospects for the extraction of steeply inclined thin orebodies.
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