Numerical Analysis on the Thermal Performance in an Excavating Roadway with Auxiliary Ventilation System

Zijun Li, Huasen Liu, Yu Xu, Rongrong Li, Mintao Jia and Mengsheng Zhang
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Zijun Li: School of Resources and Safety Engineering, Central South University, Changsha 410083, Hunan, China
Huasen Liu: School of Resources and Safety Engineering, Central South University, Changsha 410083, Hunan, China
Yu Xu: School of Resources and Safety Engineering, Central South University, Changsha 410083, Hunan, China
Rongrong Li: School of Resources and Safety Engineering, Central South University, Changsha 410083, Hunan, China
Mintao Jia: School of Resources and Safety Engineering, Central South University, Changsha 410083, Hunan, China
Mengsheng Zhang: School of Resources and Safety Engineering, Central South University, Changsha 410083, Hunan, China

IJERPH, 2021, vol. 18, issue 3, 1-17

Abstract: A steady and proper thermal environment in deep underground is imperative to ensure worker health and production safety. Understanding the thermal performance in the roadway is the premise of temperature prediction; ventilation design; and improvement in cooling efficiency. A full coupled model incorporated with a moving mesh method was adopted; reflecting the dynamic condition of roadway construction. This study revealed the characteristics of the thermal performance and its evolution law in an excavating roadway. Several scenarios were performed to examine the designs of the auxiliary ventilation system on thermal performance in the roadway. The results show that there is a limitation in the cooling effect by continuously increasing the ventilation volume. Reducing the diameter of the air duct or distances between the duct outlet and the working face will aggravate the heat hazard in the roadway. The heat release from the roadway wall increases with the increase of the advance rate of the working face or roadway section size. Furthermore; an orthogonal experiment was conducted to investigate the effect of major factors on the average air temperature and local heat accumulation in the roadway

Keywords: heat hazard; roadway construction; deep underground; working face; orthogonal test (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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