The present study investigates the possibility of developing a novel method for reducing seismicity and rockbursts in deep underground mines based on modifying drilling blasting patterns. main goal was to develop implement firing patterns multi-face production blasting, which allow increasing capability inducing stress relief rock mass, manifested seismic event. This may improve stability contr...

Nine blasts with cylindrical granite specimens were carried out under different stemming conditions. All rock had a diameter of 240 mm and length 300 mm. Explosive Pentaerythritol tetranitrate (PETN) specific charges 0.2 0.3 kg/m3 used, the in large explosion chamber. Each specimen was enclosed by steel box chamber during blasting, without constraint or confinement to from lateral top sides. Du...