О колебаниях боковых пород при действии динамических нагрузок
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Дата
2017
ORCID
DOI
10.20998/2413-4295.2017.32.08
Науковий ступінь
Рівень дисертації
Шифр та назва спеціальності
Рада захисту
Установа захисту
Науковий керівник
Члени комітету
Видавець
НТУ "ХПИ"
Анотація
В результате проведенных исследований было изучено влияние ударных нагрузок, в виде обрушений боковых пород, на состояние кровли разрабатываемого угольного пласта. Установлено, что при обрушении расслоившихся боковых пород в горную выработку и их соударении с породами непосредственной кровли, необходимо учитывать скорость и место соударения пород о балку, ее угловую скорость и амплитуду колебаний. Доказано, что применение податливых опор, в виде закладочного массива, способствует не только демпфированию колебаний балки – пород непосредственной кровли при проявлении динамических нагрузок, но и уменьшению ее угловой скорости после удара, что позволяет создать благоприятные условия для эффективного поддержания горных выработок и безопасные условия труда горнорабочих в сложных горно-геологических условиях.
Analytical studies were carried out to study the condition of the roof rocks of the developed coal seam under the action of dynamic loads in the form of collapses of exfoliated lateral rocks, with the placement of a lining massif or broad compliant bands in the developed space. The main provisions of classical mechanics, the theory of oscillations and mathematical analysis, the theory of elasticity, and the theory of impact were used. As a result of the conducted studies, the effect of impact loads, in the form of lateral rock collapse, on the condition of the roof of the developed coal seam, was studied. The rocks of the roof were presented in the form of a beam with a hinged fixed support and with a supple support, and the collapsed rocks-in the form of a block. When collapsing lateral rocks collapse into the mine workings and their collision with the rocks of the direct roof, it is necessary to take into account the speed and the place of rock collision on the beam, its angular velocity and the amplitude of the oscillations have been established. The use of compliant supports, in the form of a backfilling array, contributes not only to the damping of the beam oscillations - the rocks of the immediate roof under the manifestation of dynamic loads, but also to the reduction of its angular velocity after impact has been proved. This allows creating favorable conditions for effective maintenance of mine workings and safe working conditions for miners in difficult mining and geological conditions.
Analytical studies were carried out to study the condition of the roof rocks of the developed coal seam under the action of dynamic loads in the form of collapses of exfoliated lateral rocks, with the placement of a lining massif or broad compliant bands in the developed space. The main provisions of classical mechanics, the theory of oscillations and mathematical analysis, the theory of elasticity, and the theory of impact were used. As a result of the conducted studies, the effect of impact loads, in the form of lateral rock collapse, on the condition of the roof of the developed coal seam, was studied. The rocks of the roof were presented in the form of a beam with a hinged fixed support and with a supple support, and the collapsed rocks-in the form of a block. When collapsing lateral rocks collapse into the mine workings and their collision with the rocks of the direct roof, it is necessary to take into account the speed and the place of rock collision on the beam, its angular velocity and the amplitude of the oscillations have been established. The use of compliant supports, in the form of a backfilling array, contributes not only to the damping of the beam oscillations - the rocks of the immediate roof under the manifestation of dynamic loads, but also to the reduction of its angular velocity after impact has been proved. This allows creating favorable conditions for effective maintenance of mine workings and safe working conditions for miners in difficult mining and geological conditions.
Опис
Ключові слова
горное давление, ударный импульс, обвал, закладка выработанного пространства, rock pressure, dynamic force, impact pulse
Бібліографічний опис
О колебаниях боковых пород при действии динамических нагрузок / С. В. Подкопаев [и др.] // Вісник Нац. техн. ун-ту "ХПІ" : зб. наук. пр. Сер. : Нові рішення в сучасних технологіях = Bulletin of the National Technical University "KhPI" : coll. works. Ser. : New solutions in modern technologies. – Харків : НТУ "ХПІ", 2017. – № 32 (1254). – С. 48-54.