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Yu. A. Mironov
Yu. A. Mironov
Saint Petersburg Mining University
Saint Petersburg Mining University

Articles

Blasting, explosives and means of mechanization of their application
  • Date submitted
    2008-07-22
  • Date accepted
    2008-09-22
  • Date published
    2009-01-01

Analytical model of pressure change on the wall of the charge cavity taking into account the flow of detonation products through the axial channel of the profiled face

Article preview

In given work was considered an impulse’s formation process of extended charge explosive with installation a continuous and a special stemming in the hole. Was given the physical model to definite a size of the reflected wave impulse. Also was taken into account an increment radius of cross-section blast hole and expirations of detonation products. Was developed the model consists gas dynamic process in the hole during changing the central canal of the stemming.

How to cite: Mironov Y.A., Andreev R.E., Moldovan D.V. Analytical model of pressure change on the wall of the charge cavity taking into account the flow of detonation products through the axial channel of the profiled face // Journal of Mining Institute. 2009. Vol. 180. p. 171-174.
Without section
  • Date submitted
    2000-06-30
  • Date accepted
    2000-07-05
  • Date published
    2001-01-01

Method for calculation of additional rock fracture at the quasi-static stage of blasting action

Article preview

To calculate the parameters of drilling and blasting operations for explosive destruction of rocks, empirical dependences or relations based only on the action of stress waves are used. It is known, however, that at the quasi-static stage of the explosion there is additional destruction of rocks. It is manifested both in the secondary crushing of pieces in the fracture zone and in the increase in the size of this zone. Qualitatively, these effects are known and used, in particular, in the creation of various types of faces in the mouths of boreholes and wells, increasing the duration of the quasi-static stage of the explosion. However, the physical and mechanical processes of additional fracture at the quasi-static stage of the explosion have been studied much less than at the wave stage.

How to cite: Menzhulin M.G., Paramonov G.P., Mironov Y.A., Yurovskikh A.V. Method for calculation of additional rock fracture at the quasi-static stage of blasting action // Journal of Mining Institute. 2001. Vol. № 1 148. p. 138-141.