Науковий вісник НГУ

Method of analytical investigation of wall advance speed and forms of line face influence on stress-strain state of a rock massif

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Category: Mining

Last Updated on 16 July 2014

Published on 21 March 2014

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Authors:

R.O. Dychkovskyi, Cand. Sci. (Tech.), Associate Professor, State Higher Educational Institution “National Mining University”, Senior Lecturer of the Department of Underground Mining, Dnipropetrovsk, Ukraine.

Ye.V. Tymoshenko, State Higher Educational Institution “National Mining University”, Assistant Lecturer of the Department of Underground Mining, Dnipropetrovsk, Ukraine.

D.O. Astafiev, State Higher Educational Institution “National Mining University”, postgraduate student of the Department of Underground Mining, Dnipropetrovsk, Ukraine.

Abstract:

Purpose. Investigation of technological parameters, such as advance rate and angle of longwall line directed edge that are very important during substantiation of rational parameters of stoping technology at usage of plough techniques on the base of established changing regularities of rock massif stress-strain state.

Methodology. With the help of group arguments accounting method based on principal mathematical statistics we have investigated and substantiated the technological parameters (advance rate, angle of line directed edge) of stoping during thin coal seams extraction by new generation plough complexes.

Findings. The received regularities give us an opportunity to predict loads on props of mechanized support and also to correct technological parameters depending on changing situation in face, in particular, speed of plough and curvature of stoping face line.

Originality. The proposed method establishes regularities of necessary force parameters of mechanized support props and behavior pattern of side rocks. Also, from priority factors of rock massif strength and substantiation of rational parameters of stoping technology during thin coal seams extraction at longwalls advance rate more than 5 m/day by ploughs.

Practical value. On the base of the developed methodology of technological parameters determination and stresses around mine working at advance rate more than 5m/day we have proposed the technological scheme of mining at high speeds of longwall advance rate. 

References:

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Shirnin, I.G., Palkin, V.A. and Dubnitskiy, V.I. (2007), “Condition of coal and shale branches of European Union and Ukraine”, Ugol Ukrainy, no. 8, pp. 8–10.

2. Савостьянов А.В. Концепция теории сдвижения пород при подземной разработке угольных месторождений / А.В. Савостьянов, В.Г. Клочков // Сб. научных тр. Национальной горной академии Украины. – 1999. – №7. – С. 24–29.

Savostyanov, A.V. (1999), “Conception of rock movement theory during underground development of coal deposits”, Collection of Research Papers of National Mining Academy of Ukraine, no. 7, pp 24–29.

3. Бондаренко В.И. Влияние скорости подвигания лавы на состояние основной кровли в условиях Западного Донбасса: междунар. научно-практич. конф. (Днепропетровск-Ялта 11–18 сент. 2010г.). / В.И. Бондаренко, С.Л. Денисов // Школа подземной разработки – Днепропетровск: НГУ, 2010. – С. 273–277.

Bondarenko, V.I. and Denisov, S.L. (2010), “Influence of longwall advance rate on main roof position in Western Donbass conditions”, International research and practice conference “School of Underground Mining”, Dnipropetrovsk-Yalta, pp. 273–277.

4. Дичковський Р.О. Досвід застосування методу групового обліку аргументів для визначення НДС масиву при високих швидкостях посування очисного вибою / Р.О. Дичковський, Д.В. Бабець, Є.В. Тимошенко // Геотехнічна механіка: Міжвідомчий збірник наукових праць – Дніпропетровськ: ІГТМ НАН України, 2011. – № 94. – С. 41–46.

Dychkovskiy, R.O., Babets, D.V. and Tymoshenko, Ye.V. (2011), “Experience of application of group arguments accounting method for stress-strain state determination during high speeds of longwall advance rates”, Interdepartmental collection of research papers: Geotechnical Mechanics, IGTM, NAS of Ukraine, no.94, pp. 41–46.

5. Тимошенко Є.В. Прогнозування напружено-деформованого стану порід при зміні форми очисного вибою / Є.В. Тимошенко // Зб. наукових праць НГУ. – 2012. – № 37. – С 76–80.

Tymoshenko, Ye.V. (2012), “Prediction of rocks stress-strain state during shape change of longwall”, Collection of Research Papers of NMU, no. 37, pp. 76–80.

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