“Galurgia” JSC (Perm, Russia):

Solovyev V. A., Head of Laboratory, Doctor of Engineering Sciences, e-mail: solovyev@gallurgy.ru

Aptukov V. N., Leading Researcher, Doctor of Engineering Sciences

+Konstantinova S. A., Doctor of Engineering Sciences

Sekuntsov A. I., Engineer

Ground pressure in salt rocks shows by way of high-rate creep, which results in convergence of mine roadway cavity and higher load on mine support. Reinforcement of junctions of shafts and roadways as well as protection of mine shafts often uses monolithic concrete lining. After 15 or 20 years operation of shafts and junctions, the lining may fail, and many failureassociated problems may arise. Aiming to relate quantitatively displacements in walls, floors and roofs of mine roadways, as well as their main causes, monitoring of roadway cavities was carried out. Based on the monitoring data and using mathematical modeling, the influence exerted by various factors on the convergence of walls, floors and roofs in permanent roadways was evaluated. The authors discuss application efficiency of the known junction protection technique based on destressing hole drilling, as well as the new methods of making destressing slots, installing thrust baffles and placing pliant foam polystyrene between monolithic concrete lining and roadway wall rocks. The technology of preparing the pliant foam polystyrene layer during construction of mine junctions is described in the article.

1. Petukhov I. M., Batugina I. M. Geodinamika nedr (Geodynamics of subsoils). Moscow : Nedra, 1992.
2. Solovev V. A., Konstantinova S. A., Alymenko D. N., Spekhov L. M. Gornyi Zhurnal – Mining Journal, 2011, No. 12, pp. 41–45.
3. Konstantinova S. A., Kramskov N. P., Solovev V. A. Nekotorye problemy mekhaniki gornykh porod primenitelno k otrabotke almaznykh mestorozhdeniy Yakutii (Some problems of rocks mechanics as applied to processing of Yakutian diamond deposits). Novosibirsk : Nauka, 2011, 223 p.
4. Konstantinova S. A., Kulminskiy A. S., Solovev V. A. Izvestiya vuzov. Gornyy zhurnal — Proceedings of Universities. Mining journal, 2007, No. 1, pp. 57–62.
5. Gukhman V. D., Konstantinova S. A., Kramskov N. P., Kulminskiy A. S., Solovev V. A. Gornyi Zhurnal – Mining Journal, 2006, No. 8, pp. 80–83.
6. Vypolnit geomekhanicheskie issledovaniya i analiz rezultatov nablyudeniy za napryazhenno deformirovannym sostoyaniem okhrannykh tselikov pod promploshchadki rudnikov BKPRU-2,4: otchet o nauchno-issledovatelskoy rabote (Carrying out of geomechanical researches and analysis of observation results of stress and strain state of protecting pillars for industrial areas of mines of Berezniki Potassium Production Mine Administration BKPRU-2, 4: report about scientific and research work). «Galurgiya» JSC. Under the guidance of V. E. Marakov. Perm, 2007.
7. TU 5767-006-56925804-2007. Ekstruzionnyy penopolistirol «Penopleks» (Technical Requirements 5767-006-56925804-2007. Extrusion expanded polystyrene «Penoplex»).
8. Abashin Yu. S., Mishedchenko A. D., Zvonarev N. K. Okhrana vertikalnykh stvolov, sooruzhaemykh v porodakh, obladayushchikh polzuchestyu (Protection of vertical shafts, constructed in creep rocks). Shakhtnoe stroitelstvo – Mine construction, 1983, No. 9.
9. Tarasov B. G., Globa V. I., Garkushin P. K., Parfenov A. P. Geomekhanicheskie aspekty ustoychivosti gornykh vyrabotok na kaliynom rudnike «Piylo» (Geomechanical aspects of steadiness of mine excavations at the «Piylo» potassium mine). Shakhtnoe stroitelstvo – Mine construction, 1989, No. 8.
10. V. A. Solovev, V. N. Aptukov, S. A. Konstantinova. Sposob remonta gornykh vyrabotok v solyanykh porodakh (Method of maintenance of mine excavations in saliferous rocks). Patent RF, No. 2405111, MPK E 21 D 11/14. Applicant and patent holder: «Galurgiya» JSC; З. No. 2009133743/03; Applied: September 08, 2009; Published: November 27, 2010, Bulletin No. 33.