Mykhailo V.Petlovanyi,Vasyl H.Lozynskyi*,Pavlo B.Saik,Kateryna S.Sai
Underground Mining Department,National Mining University,Dnipro 49005,Ukraine
The publisher and editors regret to inform that the figure legends published for Figs.1 and 2 were not complete.The updated figures have been provided below.

Fig.1.

Fig.2.
The publisher and editors would like to apologise for any inconvenience caused.