Gas explosion - Wikipedia

A gas explosion is an explosion resulting from mixing a gas, typically from a gas leak, with air in the presence of an ignition source. In household accidents, the principal explosive gases are those used for heating or cooking purposes such as natural gas, methane, propane, butane.In industrial explosions many other gases, like hydrogen, as well as evaporated (gaseous) …

Risk assessment of gas explosion in coal mines based on fuzzy …

Aiming at improving the effectiveness and accuracy of risk assessment on gas explosion in coal mines, a new method based on the BN was developed. A graphical overview of the method is exhibited in Fig. 3. In the proposed approach, the first step is Risk/Hazard identification, reveal potential risk factors of gas explosion and their causal ...

CDC - Mining - Explosion Hazards From Methane …

Explosions in U.S. coal mines have caused death and injury to miners and destruction of workings since the first reported explosion in 1810. These explosions are caused when buildups of explosive gas and/or dust in the mine …

coal explosion - Power Engineering

coal explosion. By. -. 9.21.2010. 21 September 2010– Black Dog coal-fired power plant in Burnsville, Minn. was shut down after a September 21 explosion, according to television station WCCO ...

Explosion protection for coal grinding plants. What should …

Direct firing coal mill plant is what is installed in most power generation facilities. The coal mill is operated as an air-swept mill and "blows" directly into the combustion zone of the steam boiler, via a pipeline connection. In case of an explosion, normally as consequence of ignition within the mill chamber, there will be

Coal Dust and Gas Explosion Suppression by Barriers - ASTM …

The coal dust mixtures contained 60 to 65% total incombustible matter and were distributed in the Bureau's single entry experimental mine for a total distance of 111 m (365 ft). Dust explosions were initiated by a 7% methane-air gas zone at the face. The passive barriers were located at distances of 60 to 108 m (200 to 356 ft) from the face.

Damages of Underground Facilities in Coal Mines due to Gas …

With coal mining depth increase, gas explosion accidents due to the high gas emission rates often occur which cause significant casualties and property damages. Among them, gas explosion shock waves not only can destroy the machines and equipment in mine roadways but also cause the failure of mine ventilation facilities resulting in secondary …

Assessment of gas and dust explosion in coal mines by …

A coal dust explosion is caused by a mixture of concentrations of coal dust and air that reaches the explosion limit and meets a high-temperature fire source. These two factors are taken as intermediate events of a fault tree, to conduct a further analysis and determine the various factors that influence the occurrences of such events.

How Does Limestone Rock Dust Prevent Coal Dust …

Coal dust explosions in underground coal mines are pre­ vented by a generous application of rock dust (usually lime­ stone). If an explosion should occur, the rock dust disperses, mixes with the coal dust and prevents fl ame propagation by acting as a thermal inhibitor or heat sink. To investigate this process in more detail, a number of ex­

Experimental study on effect of dilute coal dust on gas explosion ...

1. Introduction. The coexistence of dust and combustible gases in industrial processes can significantly increase the risk of accidental explosions [].Coal mine tunnel-suspended coal dust, or gas blast waves roll up the deposition of coal dust can form a mixture with gas [2,3].When suitable conditions exist, coal dust–gas explosions can occur, posing an …

Gas Explosion - an overview | ScienceDirect Topics

At a coal fire, gases generated from the coal oxidation and pyrolysis at low temperature will blend with CH 4, forming an explosive mixture. From this point, attention to the effects of other combustible gases on CH 4 explosion should also be paid; at present, there have been little research published about this issue.

Coal gas explosion - Solid Fuel Forges - I Forge Iron

Coal gas explosion Coal gas explosion. By humphreymachine, February 19, 2012 in Solid Fuel Forges. Share More sharing options... Followers 0. Reply to this topic ... Apparently the addition of water and the resulting steam pressure forced coal gas down into the air supply pipe and as soon as I started to push it up into the fire it ignited ...

Remembering explosion in Redstone's Coal Basin Mine 40 years …

The Coal Basin mines were known to be "gassy.". An explosion in 1965 killed nine men. Methane oozes from every face of newly cut coal and when it reaches 5% to 15%, a tiny spark will set it off. Great efforts were made to ventilate the mines and hold the methane down below 1%. Powerful 8 foot fans, were at the portals, forcing gales into ...

Influence of cavity structure on gas explosion characteristics in coal ...

Gas explosion refers to the process of explosion shock wave and flame generated by violent reaction of fire source when gas reaches the explosion concentration in the process of coal mining. The explosion shock wave and flame spread along the roadway, causing serious damage to the equipment in the roadway, and causing a large number of ...

A Series of Preventable Events Leads to a Power Plant Explosion

Nov. 1, 2004. Shortly after midnight on a cold winter morning in the midwestern United States, an extraordinary sequence of unfortunate events culminated in an explosion that destroyed the boiler of a 450MW coal- and gas-fired power plant, resulting in physical damages and lost revenues estimated to be in excess of $500 million.

CDC - Mining Feature - Coal Mine Explosion …

Mining Feature: Coal Mine Explosion Prevention. There are two main types of coalmine explosions: methane and coal dust. Methane explosions occur when a buildup of methane gas contacts a heat source and there is not …

Coal dust explosibility - Centers for Disease Control and …

hazardous. The coal dust explosibility data are compared to those of other hydrocarbons, such as polyethylene dust and methane gas, in an attempt to understand better the basics of coal combustion. Keywords: explosion; coal; dust In mining and other industries that use or process coals, an accurate knowledge of the explosion hazards is essen ...

Coal Mine Gas Explosion Vulnerability Assessment Based on the ... - Hindawi

Gas explosion, which is the main type of accidents reported in coal mines, comes with serious economic and safety consequences. The present work adopts the "glass heart" model for assessing the vulnerability of coal mines to gas explosions based on a constructed gas explosion vulnerability assessment index system. The proposed index system is applied to a …

Gas explosion collapses coal mine in Pakistan, 7 killed - Yahoo!

A methane gas explosion caused a mine to collapse and kill seven coal miners in southwestern Pakistan, a mining official said Tuesday, the second such incident in the region in less than a week. The explosion took place Monday night, causing a coal mine to collapse in the district of Harnai in Baluchistan province, trapping several miners, according to a provincial …