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大吉山钨矿为急倾斜脉状矿床,矿脉密集区采用阶段矿旁法回采。在井下深孔大爆破中采用微差电气爆破,高能起爆器起爆。1981年开始在井下小型深孔爆破中,试用了导爆管非电起爆系统。爆破在467中段18~1—20~2西八大采、西九大采的矿房同时进行,爆破深孔189个,总深2618米,分布在三个凿岩天井和八个凿岩峒室中,装药量13.9吨,爆破矿量3.3万吨,安全准点起爆,爆破取得成功。
The Dajishan tungsten deposit is a steep lean vein deposit, and the mine-reef-intensive area is reclaimed by the mine-by-phase method. In underground deep hole blasting using micro-difference electric blasting, high-energy detonator detonation. 1981 began in the underground small-scale deep-hole blasting, tried the detonating tube non-electric detonating system. Blasting In the middle of 467 18 ~ 1-20 ~ 2 West eight big mining, West Kowloon mining mined at the same time, 189 deep-hole blasting, a total depth of 2618 meters, distributed in three rock drilling wells and eight drilling room In the amount of 13.9 tons of charge, blasting amount of 33,000 tons of minerals, safe punctuation, blasting success.