Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Slavko Torbica"'
Publikováno v:
Applied Sciences, Vol 13, Iss 14, p 8316 (2023)
The dominant technology in hard rock mining is drilling and blasting; therefore, the importance of fragment size estimation is an essential problem in the mining industry. By using a theoretical foundation that explains rock-fracturing mechanisms by
Externí odkaz:
https://doaj.org/article/52bae08f735f41f3be67bffc7dc8d0ed
Autor:
Slavko Torbica, Veljko Lapčević
Publikováno v:
International Journal of Mining and Geo-Engineering, Vol 53, Iss 1, Pp 63-67 (2019)
Deformation modulus of rock mass has a significant role in the support design of an underground excavation. It is determined by expensive in-situ tests or by empirical models. Existing models for estimation of deformation modulus do not consider its
Externí odkaz:
https://doaj.org/article/ecf93528c2d94ab29ff7af1d1f3b90ae
Autor:
Miloš Gligorić, Zoran Gligorić, Čedomir Beljić, Slavko Torbica, Svetlana Štrbac Savić, Jasmina Nedeljković Ostojić
Publikováno v:
Energies, Vol 9, Iss 12, p 1059 (2016)
The main aim of a coal deposit model is to provide an effective basis for mine production planning. The most applied approach is related to block modeling as a reasonable global representation of the coal deposit. By selection of adequate block size,
Externí odkaz:
https://doaj.org/article/d3d423dbc8204dbaaf423fc152b58e0c
Publikováno v:
Podzemni radovi. :49-55
Development operation in underground mining require high performance drilling and blasting. In order to determine best performing cut in Lece mine series of experiments were conducted. It was noticed that sequencing of initiation has crucial impact o
Sensitivity analysis of rock mass parameters estimate influence on decline support design using NATM
Publikováno v:
Podzemni radovi. :27-41
Capital mine development is often faced with limited geotechnical databases and designers are faced with more or less accurate estimates of missing parameters. GSI classification if often used with numerical modelling and its rounding unit is ±5 as
Autor:
Veljko Lapčević, Slavko Torbica
Publikováno v:
Podzemni radovi. :13-21
Available models for estimation of crustal stress consider the vertical stress component as weight of above laying rocks, while horizontal stress components are estimated as function of vertical component. Herein, it is assumed that horizontal stress
Autor:
Slavko Torbica, Veljko Lapčević, Nemanja Đokić, Mostafa Asadizadeh, Milenko Petrović, Miodrag Duranović
Publikováno v:
Podzemni radovi. :1-15
Discrete element modelling is common approach for analysis of dynamical processes that include granular materials. Method is commonly applied for the modeling of the gravity flow of the broken rock in caving operations. Herein, comparison of two diff
Autor:
Veljko Lapčević, Slavko Torbica
Publikováno v:
Podzemni radovi. :15-31
Optimizing blast fragmentation and reducing the damage from it are two important research subjects in this field. Detonation and explosive charge induces three sets of tension cracks in the monolith rock. Radial tension cracks are formed under the in
Autor:
Veljko Lapčević, Slavko Torbica, Milenko Petrović, Miodrag Duranović, Ljubinko Savic, Nemanja Đokić
Publikováno v:
Podzemni radovi. :31-40
It is suggested that 2D finite element method models are used for square pillar stability analysis. Equivalent width of strip pillar that is represented by FE models is determined from tributary area method by introducing equivalence of square and st
Autor:
Ljiljana Savić, Milenko Petrović, Miodrag Duranović, Slavko Torbica, Nemanja Đokić, Veljko Lapčević
Publikováno v:
Podzemni radovi. :61-68
Important parameters that describe successful sublevel stoping operation are optimal fragmentation and low damage of rock mass around stopes. In current state of operation fragmentation of blasted material is not optimal since high percentage of frag