Investigation of resistance and air leakage of auxiliary ventilation ducting in underground mine in Quang ninh

Phuong Thao Dang,Vitalii Zaiets,Zinovii Malanchuk,S Semerikov,H Danylchuk,S Sakhno,S Klimov,P Nechypurenko,T Vakaliuk,A Iatsyshyn,O Bondarenko,V Osadchyi,S Chukharev,A Striuk

doi:10.1051/e3sconf/202128008002

Abstract

Ventilation when driving roadways is one of the most important considerations in coal underground mines. Ventilation efficiency depends on fan performance and ventilation ducting system. In recent years in Vietnam, ducts have often been produced domestically. However, parameters of the duct as duct leakage, duct resistance for designing auxiliary ventilation system are referenced from abroad handbook. This lead to inaccurate design results and needs to adjust efficiency of auxiliary ventilation during driving roadways. Determination of duct resistance; air leakage in ducting system have been undertaken. The research result has been used to optimize the auxiliary ventilation system.

Highlights

The auxiliary ventilation is carried out by bringing air to the work fronts, as the track is advanced, the amount of air that reaches the front gradually decreases due to the greater resistance of the conduit and the increase of the leakage [1]
For designing auxiliary ventilation system, duct parameters were referenced from foreign handbook
With ducting length Li, the quantity of airflow in the ducting system Qi is measured; the air leakage coefficient pi is calculated as = ; Where: Q0 the quantity of airflow beyond the fan, m3/s; Qi the quantity of airflow reaching the end of the ducting length - Li

Summary

Introduction

The auxiliary ventilation is carried out by bringing air to the work fronts, as the track is advanced, the amount of air that reaches the front gradually decreases due to the greater resistance of the conduit and the increase of the leakage [1]. In Vietnam, studies on an auxiliary ventilation mainly aimed at finding solutions to improve the ventilation efficiency when mining roadways driven in coal mines. The number of these works is not much, especially there is no research on the resistance and air leakage in ducting being used in coal mines. For designing auxiliary ventilation system, duct parameters were referenced from foreign handbook. The parameters of the duct as duct resistance; air leakage play an important role in the design of the auxiliary ventilation

Fundamentals of duct resistance

Experimental procedures

Estimation of air leakage of duct used in coal underground mines

Conclusion