Quality preparation improvement of mined rock for mining extraction considering spatial temporary formation of field strain

[摘要] The analysis of blasting works production shows the necessity of quality preparation improvement of rock mass for the subsequent processing. Blast operations make up 20% to 30% of the general and end products cost. The crushing of mined rock strongly depends on an action of an explosion wave direction. The investigation results of the wave field strain at explosion of the system of borehole charges have been presented in this paper. The model and method of calculation of the wave field strain have been provided. The influence of an interval delay between a borehole set and the ignition direction on wave tension has been established. Results of the pilot tests scheme of ignition for the pit of the construction materials "Prudyansky" located in Leningrad region of Russia have been demonstrated.

[发布机构] Saint-Petersburg Mining University, 21 Line, 2, Saint-Petersburg; 199106, Russia^1

[效力级别] 电工学

[关键词] End-products;Explosion waves;Interval delay;Method of calculation;Pilot tests;Rock mass;Wavefields