The influence of specific charge , hole arrangement , charge structure , stem length , millisecond interval and ignition mode on the yield of the blasted boulder is analyzed some measures to lower boulder yield in deep hole blasting of underground mine are presented through the optimization of blasting operation parameters as follows : lowering deep hole blasting effect of geology structure , rationally determining specific charge , using technique of wide - space small burden blasting , technique of manifold charge structure and technique of millisecond compression blasting , strengthening the management of boring construction and blasting construction 該優(yōu)化技術(shù)措施主要有:減少地質(zhì)構(gòu)造對(duì)深孔落礦的影響,合理確定炸藥單耗的方法,使用大孔距小抵抗線落礦技術(shù),采用多種裝藥結(jié)構(gòu)技術(shù),采用多排微差起爆技術(shù),加強(qiáng)深孔的施工管理和加強(qiáng)爆破施工的現(xiàn)場(chǎng)管理。