不同炮孔密集系数的能量分布规律研究

Research on law of energy distribution of different borehole intensive coefficients in Yongshaba Mine

开磷集团用沙坝矿中深孔爆破参数的取值一直是矿山的难题。为了得到最佳的爆破参数，选取用沙坝矿石的岩石力学参数，采用有限元方法模拟不同炮}L密集系数爆破后的能量分布数值规律，计算结果表明，当爆破炮孔的孔径为40mm时，装药方式为耦合装药的前提下，乳化炸药爆破磷矿石的最佳炮孔密集系数m为2．2，即最小孔底距a为1．98m时矿区的爆破效果最佳。

In order to obtain the best blasting paramelers, data of the Ynngshaba Mine ＇s ore rock mechanics were selected using energy distribution law of values for the post-blasting finite ele ment simulation of different borchole intensive coefficients . The results show that when the blasting borehole is 40 mm in aper ture and charging is made in coupling manner, the best coefficient m of borehole intensive for emu＇lsion exp＇losive blasted phosphate rocks is 2.2. namely, the minimum borehole basal pillar a is 1. 98 m , blasting effect in the mine is the best.