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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publication11th International Conference on Fracture 2005, ICF11
Pages4434-4438
Number of pages5
Volume6
Publication statusPublished - 2005
Event11th International Conference on Fracture 2005, ICF11 - Turin, Italy
Duration: 20 Mar 200525 Mar 2005

Other

Other11th International Conference on Fracture 2005, ICF11
CountryItaly
CityTurin
Period20.3.0525.3.05

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ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

Cite this

Smolin, I. Y., Makarov, P. V., Stefanov, Y. P., Kuznetsov, P. V., Trubitsyn, A. A., Trubitsyna, N. V., & Voroshilov, S. P. (2005). Numerical investigation of coal fracture and dust particle formation in mining. In 11th International Conference on Fracture 2005, ICF11 (Vol. 6, pp. 4434-4438)