In order to improve the water hole blasting effect in the water rich rock area of a certain open-pit mine,a study was conducted on rock debris filling materials through theoretical analysis and on-site experiments.The influence of radial water uncoupling charge coefficient,filling length,and delayed detonation on the blasting effect was analyzed through numerical simulation.The results show that as the particle size of rock debris increases,the shear strength of the filling structure also increases,and the effect of filling is also enhanced;The filling effect is most significant when the ratio of＜5 mm with ≥5 mm rock debris particles is 3:7 in the filling structure;When the radial water uncoupled charge coefficient Kd is 1.33,perfect blasting effects can be achieved to save explosive costs;Delayed detonation can provide more free surfaces to reduce the fragmentation of rock masses.
关键词
深孔台阶爆破/炮孔填塞/水不耦合装药/爆破参数优化/数值模拟
Key words
deep hole bench blasting/hole stemming/water uncoupled charge/optimization of blasting parameters/numerical simulation
维普
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