Numerical investigation of coal fracture and dust particle formation in mining

I. Yu Smolin, P. V. Makarov, Yu P. Stefanov, P. V. Kuznetsov, A. A. Trubitsyn, N. V. Trubitsyna, S. P. Voroshilov

Результат исследований: Материалы для книги/типы отчетовМатериалы для конференции

Аннотация

The approach of physical mesomechanics is applied to the problem of coal fracture. The coal is regarded as a natural composite with a hierarchical inner structure. The applied problem of dust particle formation during cutting is considered. Macro-, meso-, and microscales are included into the study. First, the features of the stress-strain state at cutting are determined at the macroscale in numerical calculation. The outcome is used for numerical modeling of fracture and dust particle formation at the mesolevel. The microlevel is presented by evolution of microdamadges. The mesoscale simulations receive primary emphasis. A typical mesovolume containing 6 types of coal ingredients and pores of different sizes was taken for calculations. Computer simulations of mechanical behavior up to the failure of the mesovolume under different types of loading have been carried out. At the macroscale use of the elastic plastic model with taking into account damage accumulation and dilatancy effects as well as explicit crack opening by grid node splitting technique is made. At the mesoscale elastic plastic model with a combined fracture criterion is adopted. It has been shown that such an approach makes it possible to estimate quantitative parameters of dust particle formation of 2-100 μm size during the coal fracture.

Язык оригиналаАнглийский
Название основной публикации11th International Conference on Fracture 2005, ICF11
Страницы4434-4438
Число страниц5
Том6
СостояниеОпубликовано - 2005
Событие11th International Conference on Fracture 2005, ICF11 - Turin, Италия
Продолжительность: 20 мар 200525 мар 2005

Другое

Другое11th International Conference on Fracture 2005, ICF11
СтранаИталия
ГородTurin
Период20.3.0525.3.05

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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