Charge initiation schemes for ensuring high-performance operation of cyclic-flow technology cyclic link
Izvestiâ Uralʹskogo Gosudarstvennogo Gornogo Universiteta
The authors consider the issue of ensuring the quality of crushing rock mass by drilling and blasting method for high productivity of a cyclic link of a cyclic-flow technology complex. The article contains recommendations for calculating certain parameters of drilling and blasting operations, such as the width of the retaining wall B p. s , the collapse with account for the retaining wall Вr, the width of the collapse of the rock mass B f when blasting onto a free surface (for the first row of
... ertical wells and for the first series of inclined wells), the width of the collapse from the first series of wells B 1 , the deceleration time τ, the coefficient k β that takes into account the incline angle of wells β to the horizon. The authors prove the expediency of using a retaining wall in explosions of technological blocks. The authors raise the question about the management of detonation characteristics of explosives produced in the field of application for the most rational impact of an explosion on a rock massif. Since the technological schemes for preparing the rock mass to the excavation, which ensure the high-performance operation of the cyclic link of the cyclic-flow technology, can be different, then the choice of a specific drilling and blasting circuit is depends on the geological conditions and elements of the development system. As a preliminary method of breaking, one can consider the explosion of charges along the diagonal (diagonal blasting schemes) on the retaining wall. This method provides sufficient reliability of technological explosions, and with the development of modern means of blasting with decelerations between charges of more than 67 ms, there are nearly no back emissions.