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Physical and numeral modeling of stressed-deformed state of the rock massif in the working face

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Category: Geotechnical and mining mechanical engineering, machine building

Last Updated on 16 May 2013

Published on 15 November 2012

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Authors:

K.S. Ishchenko, Cand. Sci. (Tech.), Senior Research Fellow, N.S. Polyakov Institute of Geotechnical Mechanics of National Academy of Science of Ukraine, Senior Research Fellow, Dnipropetrovsk, Ukraine

A.P. Krukovskiy, Cand. Sci. (Tech.), Senior Research Fellow, N.S. Polyakov Institute of Geotechnical Mechanics of National Academy of Science of Ukraine, Dnipropetrovsk, Ukraine

V.V. Krukovskaya, Cand. Sci. (Tech.), Senior Research Fellow, N.S. Polyakov Institute of Geotechnical Mechanics of National Academy of Science of Ukraine, Dnipropetrovsk, Ukraine

A.K. Ishchenko, State Higher Educational Institution “National Mining University”, Research Fellow, Dnipropetrovsk, Ukraine

Abstract:

Purpose. To investigate the stress field character and numerical solution for distribution of stress in field that forms around working face before drilling and blasting.

Methodology. A few series of experimental researches of the character of stress field distribution around the mining face were conducted in laboratory terms by means of photoelasticity method and using the developed stand, and the method of the numerical simulation of rock massif stressed-deformed state in the face of the preparatory working by the finite element method and the method of continuous medium mechanics. The offered equipment set is the part of new method of the stressed-deformed state modeling.

Findings. The experimental and theoretical researches of modeling the stressed-deformed state of rock massif are presented in five schemes for offered model of working face in elastoplastic construction using finite element method. It was established by researches that the face of working of both line and curve configurations require mounting of holes with increased technological parameters in central part of the working. It will allow to move an unloading area ahead of the face of working and to broaden the unstressed area.

Originality. Character and laws of distribution of numerical values stressed field round the preparatory workings in the central part before drilling and blasting have been determined.

Practical value. When driving the working by drill and fire system use of the right set of blast holes improves work performance.

References:

1. Пат. Україна по заявці a 2011 01078 МКВ 7 Е21С 39/00 Спосіб імітації напружено-деформованого стану гірського массиву на моделях / Іщенко К.С., Круковська В.В., Круковський О.П., Іщенко О.К.; заявник і власник патента ІГТМ НАН України. – № а 2011 01078; замовл. 31.01.2011.

Ishchenko, K.S., Krukovskaya, V.V., Krukov-skiy, A.P. and Ishchenko, A.K. Patent of Ukraine 2011 01078 МКВ 7 Е21С 39/00. “A method of imitation of the stressed-deformed state of rock massif on models” Declarant and owner of the patent IGTM of NAN of Ukraine. № a 2011 01078; declared January 31, 2011.

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