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Statistical Study Of Rock Drilling By Hypervelocity Jets From Explosive Shaped Charges, John William Brown
Statistical Study Of Rock Drilling By Hypervelocity Jets From Explosive Shaped Charges, John William Brown
Doctoral Dissertations
"The drilling effect in rock of hypervelocity jets from explosive shaped charges was investigated experimentally to supplement a rapid excavation concept. The effects of the design factors of the charge and the mechanical properties of eight rock types were studied. Experiments were both designed and analyzed upon statistical principles. A full factorial experimental design was used for each of seven rock types. An analysis of variance and the k-ratio least significant-difference test were applied to the results.
The optimum design of shaped charges for drilling was found to be independent of rock type and rock properties. For composition C-4 charges …