Research on dust migration characteristics in inclined fully mechanized working face

doi:10.16265/j.cnki.issn1003-3033.2026.S1.0027

Abstract

Abstract:

To explore the dust migration characteristics in inclined fully mechanized working faces, this study established a 1∶1 full-scale physical model using Solidworks. Based on the gas-solid two-phase flow theory and combined with field-measured parameters, ANSYS numerical simulation software was employed to calculate and analyze the dust migration characteristics. The results show that airflow forms high-velocity zones at the intake corner, shearer position, and return corner, with maximum wind speeds reaching 2.32, 2.24, and 2.12 m/s, respectively. Additionally, the wind speed on the walkway side is consistently lower than that on the cable trough side throughout the space. Dust diffuses downwind along the airflow direction in the working face, with the highest dust concentration (2 465.67 mg/m³) observed at the front drum of the shearer. The working conditions prolong dust suspension time and reduce the settlement rate, forming a high-concentration dust cloud at the breathing zone height on the walkway behind the shearer's front drum, with a length of 62.39 m, width of 1.75 m, and average concentration of 892.43 mg/m³. This area is identified as a key protection zone during coal mining.

Key words: fully mechanized working face, dust migration, diffusion characteristic, numerical simulation, dust prevention and control

CLC Number:

X936

Zhang Wenzheng, Zhao Shengnan. Research on dust migration characteristics in inclined fully mechanized working face[J]. China Safety Science Journal, 2026, 36(S1): 183-189.

Figures/Tables 8

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类别	参数	数值
边界条件	湍流模型	k-ε
	入口边界速度/(m/s)	1.15
	滚筒轴向平面速度/(m/s)	0.6
	滚筒径向平面速度/(m/s)	-0.455
	水力直径/m	4.03
	湍流强度	3.29%
粉尘参数	滚筒产尘质量流率/(g/s)	11.5
	移架产尘质量流率/(g/s)	12.3
	粉尘最小粒径/m	2.19×10^-7
	粉尘中等粒径/m	3.92×10^-6
	粉尘最大粒径/m	3.08×10^-5
	分布指数	1.78