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DEVELOPMENT OF DEPOSITS
ArticleName Stability of junctions of shafts and mine roadways in saliniferous rock masses
ArticleAuthor Solovyev V. A., Aptukov V. N., +Konstantinova S. A., Sekuntsov A. I.
ArticleAuthorData

“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

Abstract

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.

keywords Potassium salt deposits, deep shafts, mine roadway junctions, stresses, convergence of roadway cavity, monolithic lining, pliant layer, foam polystyrene, thrust baffles
References

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