Study on Underground Utility Tunnel Fire Characteristics under Sealing and Ventilation Conditions

Underground Fire Rollback Simulation in Large Scale Ventilation Models

A feasible solution is to create a single network model to simulate both the large scale ventilation model and the smaller scale rollback behavior. This can potentially be achieved by creating a detailed high density three-dimensional mesh of pathways bounded by the airway around a fire which then feeds into the simpler network of a large scale ventilation model. The high density mesh allows a ...

Sealing of Rotary Drums for Operation Under Pressurized Conditions

DPM flow pattern of LHD in underground mines with different ventilation conditions

Diesel-operated Load Haul Dumper (LHD) vehicles are commonly used in underground coal mines. Despite their value as utility vehicles, the main drawback of these vehicles is that they generate diesel particulate matter (DPM), a known carcinogenic agent. In this work, an attempt is made to model DPM flows generated by LHDs in an underground coal mine environment for different DPM flow and intake ...

environmental impacts of urban utility tunnel construction (case study: urban utility tunnel district 22 of tehran)

urban facilities are necessary components of cities. in all grown and developed cities of the world there are tremendous network of facilities such as water and electric ties, water sewage drainage, water piping and gas piping. that has not been installed in proper depth underground and locations and with growing of the cities and consumption of population. they need to be replaced by excavatin...

Application of VENTSIM 3D and mathematical programming to optimize underground mine ventilation network: A case study

Ventilation is a vital component of an underground mining operation, used to guarantee a safe atmosphere for workers and survive them from the hazardous and toxic gases. In the recent years, engineers have begun to apply new operation research techniques in order to optimize the ventilation systems to assist in achieving a regulatory compliance, reduce ventilation costs, and improve its efficie...