УДК 001.8:622.256.75:622.45: 622.678.53

DOI: 10.21440/0536-1028-2019-8-133-142

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Kopytov A. I., Pershin V. V., Wetti A. A. Research on free fall skip parameters variation impact on pentice stability when sinking vertical shafts. Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal = News of the Higher Institutions. Mining Journal. 2019; 8: 133–142 (In Russ.). OI: 10.21440/0536-1028-2019-8-133-142

Abstract

Introduction. In order to protect workers engaged in shaft sinking works, artificial protective equipment (pentices) with the support element from powerful I-beams or truss structures are used. They have to withstand enormous push loading, be strong, simple in design, have less labor input during construction and dismantling.
Research aim. On the basis of the obtained results of mathematical modeling, the research aims to increase the efficiency of equipment for the deepening of vertical shafts of mines, by justifying the dynamic loads on the safety shelves and determining their rational parameters, which ensure the reduction of material intensity and labor-intensive work.
Methodology. In order to substantiate parameters and develop the design of pentices when sinking vertical shafts in case of operational winding performance, with the help of mathematical modeling, the dependencies between the skip fall time at falling height variation with the account of speed and the direction of the air flow in the shaft were determined.
Results. LLC SibGorComplexEngineering (Novokuznetsk) together with the Department of Construction of Underground Structures and Mines of T. F. Gorbachev Kuzbass State Technical University have developed several new design variants of protective pentices for vertical shafts sinking in case of operational winding performance. It is a Z-shaped structure of the offset in height, parallel to each other upper and lower protective pentices, bushed with sloped reflective metal sheets and interconnected by a vertical division wall.
Summary. Pentice design allows reducing the impact of push loading due to direction changing and kinetic energy reduction of falling bodies. Industrial testing of a new construction of wedge protective pentices proved their high reliability, efficiency and safety of operations under shaft sinking Skipovoi of Gorno-Shoria branch of OJSC Evrazruda.

Key words: vertical shaft; shafts sinking; wedge protective pentice; dynamic load; skip fall.

REFERENCES

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Received 24 May 2019