Most of the underground buildings rely on mechanical ventilation system for achieving an
acceptable indoor thermal comfort level. In order to alleviate the greenhouse effect, it is …

The production of dust when driving mining roadways can affect workers health. In addition,
there is a decrease in productivity since Mine Safety regulations establish a reduction in the …

Studies have been conducted in a roadway excavated in a coalbed of a deep underground
coal mine located in Northern Spain (Hullera Vasco Leonesa SA), by both airflow velocity …

Multiple toxic gases, such as carbon monoxide (CO), are generated after blasting of plateau
tunnel. To study the influence of high-altitude environment on the diffusion and …

A study has been carried out in a coal heading, excavated by drilling and blasting in a deep
underground mine located in Northern Spain (Hullera Vasco Leonesa SA), by …

Forced ventilation and recirculation systems are usually used in the construction of long twin
tunnels as they offer large amounts of fresh air economically. However, because of the …

The excavation of tunnels and mining roadways requires auxiliary ventilation systems to
dilute the noxious gases from blasting and diesel engines and provide a safe environment …

Forced ventilation is typically used in the construction of tunnels since it is an economical
method to provide high amounts of fresh air. Air velocity and pollutant concentration near the …

During the excavation process of underground caverns, the rational selection of the
ventilation scheme is very important for the safety and health of construction workers. The …

The effective interaction length of airflow (L e) is the key factor in the determination of the
distance between an air duct nozzle and the working face in dead-end tunnels. At present …