Analysis of braking a cylindrical boulder and application to bench blasting. (English) Zbl 0856.73063
Summary: The main objective is to establish the bursting pressure of a cylindrical boulder made of brittle material. The formulas found by means of a relatively simple approach are extended and applied to one of the fundamental problems in open pit mining, namely the maximum burden determination in bench blasting. While a number of such formulas is currently in use, they come from empirical observation. The expressions given here, based on (simplified) engineering mechanics of blasting processes are intended to fill the existing gap. The range of values predicted with the new expressions is consistent with experimental observations.
MSC:
| 74R99 | Fracture and damage |
References:
| [1] | Rustan, P. A.: Burden, spacing and borehole diameter at rock blasting. The Third International Symposium on Rock Fragmentation by Blasting. Brisbane, Australia, 1990. |
| [2] | Bilgin, H. A., Pasamelimeloglu, A. G.: Optimum burden determination and fragment evaluation by full scale slab blasting. Fourth International Symposium on Rock Fragmentation by Blasting. Vienna, Austria, 1993. |
| [3] | Konya, C. J., Walter, E. J.: Surface blast design. Englewood Cliffs: Prentice Hall 1990. |
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