Implementation of the Blast Design and Pattern Adaptation Method at Structurally Complex Deposit
V. L. Yakovlev, S. N. Zharikov, A. S. Regotunov, V. A. Kutuev
Institute of Mining, Ural Branch, Russian Academy of Science, Yekaterinburg, Russia
Keywords: Drilling and blasting, blast design and pattern adaptation, blast impulse, blast impact zone, techniques, structurally complex deposits, seismic effect
Abstract
The authors have developed the method of adapting blast designs and patterns to structurally complex mineral deposits on the basis of synthesis of theory of zonal rock fracture and theory of blast impulse. This article describes the sequence of practical adjustment of blast designs and patterns with regard to geological conditions. The method includes monitoring of rock mass, analysis of data, selection of techniques and their efficiency evaluation using an integral criterion embracing safety of blasting, quality of fragmentation and economic indicators. The authors propose classification of the techniques and their combinations, capable of reduction of seismic impact, flyrock and expenditure. Particular attention is given to the blast impulse peak pressure and duration control. The results enable adapting blast designs and patterns to nonuniform rock mass, and enhancing safety and efficiency of mining operations. The research prospects are connected with artificial intelligence technologies and digital data bases for forecasting blasting impact.
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