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ArticleName Selection of a strata pressure reduction method to extract deeper level reserves of Mir pipe
DOI 10.17580/gzh.2021.02.06
ArticleAuthor Zaprudin V. A., Zyryanov I. V., Kulminskiy A. S., Kotenkov A. V.

Uralmekhanobr, Yekaterinburg, Russia:

V. A. Zaprudin, Junior Researcher
A. V. Kotenkov, Deputy Head of Mining Science Department

Yakutniproalmaz Institute, ALROSA, Mirny, Russia

I. V. Zyryanov, Deputy Director of Science, Doctor of Engineering Sciences,
A. S. Kulminskiy, Deputy Chief Engineer in Underground Mining


The article presents the chronology and stages of mining resumption at Mir pipe. The initiatory steps of the conceptual approach to underground mining of ore reserves at the depth greater than 1500 m are described. The primary measures on catchment of highly mineralized water from Metegero-Ichersky aquifer are identified. The exploratory study results on deeper level mining safety in the future underground mine in terms of the strata pressure reduction are given. The authors in detail discuss two methods of rock mass destressing: destressing drilling and formation of protection layers with different parameters at the depths of 1000 m and greater. Natural stress state of rock mass is modeled in Rocscience RS3 environment. The analyses of the mathematical models of ore and enclosing rock destressing show that the safest and the most effective methods of dеstressing of deeper level rock mass in Mir Mine is creation of a protective separation layer both in ore body and in enclosing rock mass on the both sides of the ore body at a distance of 15 m. Such destressing measures can allow safe mining of ore reserves using the sublevel stoping method with sublevels to 50 m high. The research findings will be used in the front-end engineering as the basis for the further mine planning and design.

keywords Open pit mine, safe mining, Yakutniproalmaz Institute, mine planning and design, rocks, stresses

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