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Dust removal of large cross-section tunnels: following ventilation and its adjustment strategy

  • Chao Cao
  • Jiyun Zhao
  • Haigang Ding
Technical Paper

Abstract

Concerning human health and safety, more studies should be taken place on the impact of dust movement in the tunnels construction. In the case of large cross-section tunnels driven by boom-type roadheader, dust removal efficiency of the ventilation system is essential for safety protection in tunnels. For the first time, to adapt the larger cross-section tunnels, the following ventilation system has been proposed, and the feasibility has been proven by the comparison results of CFD numerical simulation between large and small cross-section tunnels. Comparisons of removal effect for different cutting point have been made, and the adjustment direction to better removal effect has been summed up. In addition, the two adjustment strategies have been presented and compared within actual working conditions. The results indicated the best parameters range of following ventilation system refers to distance and airflow ratio. The data about dust concentration on different height plane are meaningful for further study into dust removal in large cross-section tunnels, and the rules could be applied in other larger cross-section tunnels.

Keywords

Large cross-section Following ventilation system Dust movement Adjustment strategy 

Notes

Acknowledgements

This work is supported by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), the Key Research and Development Program of Jiangsu (BE2015039) and Natural Science Foundation of Jiangsu Province (BK20150186). We thank Francisco Ricardo Cunha and anonymous reviewers for their careful comments on an earlier draft of this paper.

Supplementary material

40430_2018_1403_MOESM1_ESM.doc (2.9 mb)
Supplementary material 1 (DOC 2999 kb)

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Copyright information

© The Brazilian Society of Mechanical Sciences and Engineering 2018

Authors and Affiliations

  1. 1.School of Mechatronic EngineeringChina University of Ming and TechnologyXuzhouChina
  2. 2.Jiangsu Key Laboratory of Mine Mechanical and Electrical EquipmentChina University of Mining and TechnologyXuzhouChina

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