降低裂隙性矿体爆破大块率的探讨

Study on Reducing the Ratio of Coarse Blasting Fragmentation in Fracture Structure Ore Bodies

通过采取微差挤压爆破技术，选取适合于裂隙性矿体的爆破参数，以及合适的起爆方法和微差间隔时间等控制爆破技术后，使大块率由过去的３０％降至目前的１０％．

By adopting the technique of blasting control such as millisecond delaysconstricted blasting, that is,to select the right blasting parameters for fracturestructure ore bodies, suitable initiation mode and delay periods. The ratio of coarsefragmentation is reduced from 30% to 10% .The methods and experiments are statedin this paper.