Drop-weight impact fragmentation of gas-containing coal particles--颗粒学报PARTICUOLOGY

Li, C., Hao, M., Geng, Z., He, Y., & Wei, S. (2021). Drop-weight impact fragmentation of gas-containing coal particles. Particuology, 55, 35-42. https://doi.org/10.1016/j.partic.2020.09.005

Drop-weight impact fragmentation of gas-containing coal particles

Chengwu Li ^a, Min Hao ^a *, Zhengya Geng ^a, Yonghang He ^a, Shanyang Wei ^b

a School of Emergency Management and Safety Engineering, China University of Mining and Technology, Beijing 100083, China
b Mining College, Guizhou University, Guiyang 550025, China

10.1016/j.partic.2020.09.005

Volume 55, April 2021, Pages 35-42

Received 31 July 2020, Revised 2 September 2020, Accepted 8 September 2020, Available online 27 October 2020, Version of Record 3 February 2021.

E-mail: safety19@student.cumtb.edu.cn

Highlights

• The Fractal particle size distribution model can most effectively describe the crushed coal particle sizes.

• The equilibrium pressure and type of gas can influence the Fractal distribution parameter.

• The equilibrium pressure and type of gas can affect energy consumption and crushing efficiency of crushing energy.

Abstract

Research on coal fragmentation can play an important role in understanding coal and gas outbursts. The study discussed in this paper explored the fragmentation of gas-containing coal particles using the drop-weight impact method. The effects of equilibrium gas pressures and type of adsorbate gas on particle size distributions and fragmentation energy were investigated in detail. We found that the Fractal particle size distribution model can most effectively describe the crushed coal particle sizes. The equilibrium pressure and type of gas can influence the Fractal distribution parameter. The crushing energy is composed of energy to create new surfaces and other forms of energy that are dissipated but the equilibrium gas pressure and type of adsorption gas can affect energy consumption and crushing efficiency. This research will be of guiding significance to the intensity evaluation and mechanism understanding of coal and gas outbursts.

Graphical abstract

Keywords

Gas-containing coal particles; Particle size distribution; Energy consumption; Impact fragmentation

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