**Author details**

Amanbek Jainakov<sup>1</sup> , Abdikerim Kurbanaliev2 \* and Maralbek Oskonbaev2

\*Address all correspondence to: kurbanaliev@rambler.ru

1 Asanaliev Institute of Mining and Technologies of the Razzakov Kyrgyz State Technical University, Bishkek, Kyrgyzstan

2 Osh State University, Osh, Kyrgyzstan
