Underground fire hydrants and dimensions of surface box openings

1950 ◽  
Keyword(s):  
Underground Fire

scholarly journals Computer Simulation of the King's Cross Fire: Effect of Radiative Heat Transfer on Fire Spread

1991 ◽  
Vol 205 (3) ◽  
pp. 201-208 ◽  
Author(s):  
W M G Malalasekera ◽  
F Lockwood
Keyword(s):  
Mathematical Model ◽  
Radiative Heat ◽  
Health And Safety ◽  
Fire Spread ◽  
Future Research ◽  
Full Description ◽  
Department Of Health ◽  
Underground Fire ◽  
The Mathematical Model ◽  
Good Agreement

A mathematical model has been applied to simulate model experiments of the 1987 King's Cross underground fire by the Department of Health and Safety Executive. The predicted growth of the fire is compared with the experimental data and in particular the predicted and measured times to ‘flashover’ are compared. The comparisons show exceptional agreement which, in part, may be fortuitous due to the need to facilitate the prediction of the early stages of the growth with the aid of an experimentally estimated fire strength. The good agreement nonetheless is also due to the full description of the radiation transfer which is a feature of the mathematical model. It is concluded that the flashover phenomenon that occurred at King's Cross was thermal radiation driven and that future research should be devoted to modelling the details of fire spread across a combustible surface.

scholarly journals Coal and Colonialism: Production Relations in an Indian Coalfield, c. 1895–1947

1996 ◽  
Vol 41 (S4) ◽  
pp. 83-108 ◽  
Author(s):  
Dilip Simeon
Keyword(s):  
World War I ◽  
World War ◽  
Proximate Cause ◽  
Jharia Coalfield ◽  
The World ◽  
Production Relations ◽  
Underground Fire ◽  
End Of The World ◽  
Deep Source

The year 1995 marked the centenary of the exploitation of a 400 squarekilometre tract in the Indian province of Bihar known as the Jharia coalfield. From 1895, when rail lines entered the region, until the end of the World War I, coal output in India increased tenfold and the size of the mines' workforce fivefold. By 1907 Jharia was yielding half of India's output. One of its oldest mines was Khas Jharia, which worked a 260-feet deep source. Thirty-four years after it opened, its surface had merged with the outskirts of Jharia township and restrictions were imposed on the dimensions of its galleries. Despite these, Khas Jharia's pillars collapsed on 8 November 1930 causing an 18-feet deep subsidence and widespread destruction. This incident was the proximate cause of an underground fire which rages to this day.

Numerical Simulation on Ghosting Fire in the Confined Underground Space

2014 ◽  
Vol 580-583 ◽  
pp. 2667-2670
Author(s):  
Pei Hong Zhang ◽  
Xiao Wei Lu ◽  
Xiao Ming Zhang
Keyword(s):  
Heat Release ◽  
Heat Release Rate ◽  
Release Rate ◽  
Source Area ◽  
Confined Space ◽  
Source Areas ◽  
Fire Source ◽  
Underground Fire ◽  
Two Parameters ◽  
Air Vent

The phenomenon of ghosting fire development in underground confined space is simulated to analyze the impacts of ghosting fire generation via some conditions -- different air vent sizes and different fire source areas. FDS is used to establish a physical model of underground fire laboratory in Northeastern University, the simulation is conducted by setting two parameters, the air vent size and the fire source area. The fire heat release rate, temperature, concentration of CO, O2 are measured to analyze the case of ghosting fire generation in underground confined space with different air vent sizes and different fire source areas. It’s most likely to generate ghosting fire when the simulating parameter is that the air vent size is 0.4m × 0.4m and the fire source area is 0.96m2. The conclusion is that increasing the air vent size is not a simple ascending and descending relationship with the occurrence time and duration time of the ghosting fire. Increasing the fire source area can improve the fire heat release rate effectively, and promote the formation of ghosting fire.

Initiation of underground fire sources

2016 ◽  
Vol 52 (3) ◽  
pp. 576-592 ◽  
Author(s):  
V. N. Oparin ◽  
T. A. Kiryaeva ◽  
V. Yu. Gavrilov ◽  
Yu. Yu. Tanashev ◽  
V. A. Bolotov
Keyword(s):  
Underground Fire

scholarly journals Critical velocity analysis for safety management in case of tunnel fire

2020 ◽  
Vol 305 ◽  
pp. 00023
Author(s):  
Omar Lanchava ◽  
Nicolae Ilias
Keyword(s):  
Critical Velocity ◽  
Critical Speed ◽  
Safety Management ◽  
Combustion Products ◽  
High Heat ◽  
Velocity Analysis ◽  
Critical Number ◽  
Effective Management ◽  
Tunnel Fire ◽  
Underground Fire

Heat, smoke and other toxic products may spread along the tunnel, in both directions from the seat of fire, causing different kinds of damage to people. Anyway, underground fire causes complicated results, which is preventing factor for life rescue and evacuation, creating difficulties for firemen and life rescue crew. Analysis of the critical speed, which is necessary for the effective management of combustion products, has been made for tunnel fires with high heat release rate. The characteristic changes in the critical Froude number in the work are presented in accordance with the critical speed. Particularly, it was noted that the formula determining the critical speed requires knowledge of the average smoke temperature, while the formula for calculating the last value includes the value of the required critical speed. In order to overcome this, Froude’s critical number Frc=4.5 has been introduced, which is not the way of solution, as it directly means constant critical velocity for the fire of any power and accordingly, does not correspond to experimental data.

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