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长治矿山机械厂研制的BQ-200型装药器8月中旬至9月上旬在大庙铁矿进行了一个月的工业性试验证明,该装药器结构原理使用性能符合设计要求,适合我国目前金属矿山井下采矿爆破装药使用。在井下生产试验期间共装炸药3009.3公斤,装填炮孔总深1394.4米,装药密度为0.96～1克/厘米~3,平均返粉率6.3％。平均装药
Changzhi Mining Machinery Plant developed BQ-200-type charge in mid-August to early September at the Temple Iron Mine carried out a month of industrial tests show that the principle of performance of the charger with the performance of the design requirements for China’s current Metal mine underground mining blasting charge use. In the downhole production test, 3009.3 kilograms of explosives were loaded during the production test. The total depth of the blast hole was 1394.4 meters and the charge density was 0.96-1 g / cm3. The average powder return rate was 6.3%. Average charge