Work

Influencing factors and correlation analysis of ventilation and cooling in deep excavation roadway

Year: 2019

Type: article

Abstract: Aiming at ameliorate poor working environment and high temperature in deep excavation roadway, cooling rate η, and optimal k-value solution were used as the evaluation index. The on-site measurement and the simulation based on Comsol software were used to test and predict the effect of ventilation cooling of the −652 m excavation roadway in Xiadian Gold Mine. The results show that the weight of three factors affecting roadway temperature is: k > S > ΔT, and η are exponentially related to all the three factors. When the slope of η is larger than 0.1, the increase in air volume does not change η too much while the cost increases sharply. So it can be considered that the k-value optimal solution is obtained. Combining the above empirical formulas with the formula of inlet air temperature, the demanded inlet air temperature that can ensure the workplace can be obtained to be beneath 301.15 K. Based on this method, the inlet air temperature for cooling future −1435 m workplace in Xiadian to under 301.15 K should not exceed 297.15 K. The results of the dimensionless analysis are universally applicable, so analysis on the ventilation and cooling can be performed on mines under any different conditions.

Source: Case Studies in Thermal Engineering

DOI: 10.1016/j.csite.2019.100483

Authors: Wei Dingyi, Du Cuifeng, Xu Haiyue, Zhang Lianfu

Institution: University of Science and Technology Beijing

Language: English

Topic: Geoscience and Mining Technology

Subfield: Safety, Risk, Reliability and Quality

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $550

Funders: National Science Foundation, National Natural Science Foundation of China, National Key Research and Development Program of China