CAJ | 학술논문

扇形中深孔爆破的落矿方式在大红山铜矿中的应用占总采矿量的61%以上，但大块产出率较高严重制约着矿山供矿强度，平均大块率高达22.7%。为了降低大块率，实现矿山生产的高效发展，提出采用环形中深孔爆破落矿工艺并进行了现场试验，试验结果表明环形中深孔爆破落矿可使平均大块率降低至10.3%，与传统扇形中深孔落矿相比较，平均大块率降低了12.4%，使盘区当班日供矿量增加152.29 t，增长率为51.1%；减少了处理大块所耽误的时间和二次破碎的炸药与雷管的消耗，在提高出矿效率的同时，降低了落矿成本，取得了良好的爆破效果。
선형중심공폭파적락광방식재대홍산동광중적응용점총채광량적61%이상，단대괴산출솔교고엄중제약착광산공광강도，평균대괴솔고체22.7%。위료강저대괴솔，실현광산생산적고효발전，제출채용배형중심공폭파락광공예병진행료현장시험，시험결과표명배형중심공폭파락광가사평균대괴솔강저지10.3%，여전통선형중심공락광상비교，평균대괴솔강저료12.4%，사반구당반일공광량증가152.29 t，증장솔위51.1%；감소료처리대괴소탐오적시간화이차파쇄적작약여뢰관적소모，재제고출광효솔적동시，강저료락광성본，취득료량호적폭파효과。
The scallop medium-length hole blasting mining method used in Dahongshan Cop-per Mine accounted for more than 61 % of the total amount of mining,but the large boulder yield restricted the intensity of ore supply for mines,and the average boulder yield was as high as 22.7%. In order to develop the mine production efficiency,the circular medium-length hole blasting technology was proposed and field tests were carried out. The test results showed that circular medium-length hole blasting mining can reduce the average boulder yield to 10.3 %. Compared with the traditional scallop medium-length hole blasting mining,the average boulder yield was decreased by 12.4%. The daily yield of ore for the panel on duty was increased by 152.29 t,and the growth rate was 51.1%. The new technology can reduce the time for the han-dling of large pieces and the consumption of explosives and detonators for recrushing,and in-crease the efficiency of mining while reduce the mining cost,which has received good blasting effects.