An empirical approach for predicting burden velocities in rock blasting

An analytical relation between burden velocity and ratio of to blasthole diameter is developed in this paper. This found be consistent with the measured velocities all 37 full-scale blasts from published articles. These include single-hole blasts, multi-hole simultaneously-initiated various borehole diameters such as 64 mm, 76 92 115 142 mm 310 mm. All boreholes were fully charged. The agreement calculated demonstrates that can used predict a wide range blast fully-coupled explosive charge help determine correct delay time adjacent holes or rows involved tunnelling (or drifting), surface underground mining production opening slot blasts. In addition, theoretical agree 9 laboratory small-scale certain extent. To blast, further study modification necessary by using more future.