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identifiion of spontaneous combustion prone zones in

Identification of Spontaneous Combustion Prone Zones in ...

J. Xie, S. Xue, and W. Cheng, Identification of Spontaneous Combustion Prone Zones in Longwall Top Coal Caving Goafs, in Naj Aziz and Bob Kininmonth (eds.), Proceedings of the 2008 Coal Operators' Conference, Mining Engineering, University of Wollongong, 18-20 February 2019 https://ro.uow.edu.au/coal/18 Research Online is the open access institutional repository for the

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Identification of Spontaneous Combustion Prone Zones in ...

Study of spontaneous combustion " three zones " in LTCC goafs, Coal Mine Modernization, 2005(5):21-23. Theory of Identification of Spontaneous Combustion Prone Zones Jan 2001

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Identification of Spontaneous Combustion Prone Zones in ...

Identification of Spontaneous Combustion Prone Zones in Longwall Top Coal Caving Goafs . By J. Xie, S. Xue and W. Cheng. Abstract. Longwall top coal caving (LTCC) mining method has been used to extract thick coal seams in China. Unfortunately the method has also brought with it an increased risk of spontaneous combustion (sponcom) in active LTCC goafs. It is therefore critical to identify the ...

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"Identification of Spontaneous Combustion Prone Zones in ...

Longwall top coal caving (LTCC) mining method has been used to extract thick coal seams in China. Unfortunately the method has also brought with it an increased risk of spontaneous combustion (sponcom) in active LTCC goafs. It is therefore critical to identify the sponcom prone zones in LTCC goafs so that remedy measures can be taken to prevent sponcom from occurring.

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Spontaneous Combustion - an overview ScienceDirect Topics

The spontaneous combustion of coal is a common concern within the coal stockyard and inter-burden layers in coal mines. It is a process of self-heating without the application of external heat. When coal comes in contact with oxygen, the oxidation process starts and heat is produced.

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Identification of Spontaneous Combustion Prone Zones in

Identification of Spontaneous Combustion Prone Zones in Longwall Top Coal Caving Goafs . By J. Xie, S. Xue and W. Cheng. Abstract. Longwall top coal caving (LTCC) mining method has been used to extract thick coal seams in China. Unfortunately the method has also brought with it an increased risk of spontaneous combustion (sponcom) in active LTCC goafs. It is

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Spontaneous Combustion - an overview ScienceDirect Topics

Spontaneous combustion may occur in piles of moist organic material where heat is generated in the early stages by the respiration of bacteria, molds, and microorganisms. High moisture content is required for vigorous activity, and heating is generally controlled by maintaining the moisture content below a predetermined level. This type of heating can only raise the material

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Determination on the hazard zone of spontaneous coal combustion in the

01/10/2020  An oxygen concentration of 18 % is the critical point between the cooled zone and the spontaneous combustion zone; an oxygen concentration of 10 % is the critical point between the spontaneous combustion zone and the suffocation zone. The planes with vertical direction z = 0.5 m in the three models were selected, and risk zones were classified

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Spontaneous Combustion Explained – Armstrong Forensic

08/12/2015  There are many other common household materials that are prone to spontaneous combustion. They include, but not limited to: linseed oil, coal, hay, and other agricultural products to name a few. The most recorded and confirmed causes of spontaneous combustion cases were from improper disposal of oily rags (Evarts 2011). Avoiding spontaneous combustion is

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A review of research on spontaneous combustion of coal -

01/05/2020  By simulating the spontaneous combustion of coal, characteristic parameters, such as temperature, oxygen consumption, gas variation, heat intensity, and the limiting parameters can be determined and the combustion zone can be determined using the empirical approach. A number of computerized approaches for data acquisition and evaluation of spontaneous

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Self-heating and spontaneous combustion FernFlower Group

Prone to microbiological spontaneous combustion have combustible materials, especially hydrated, serve as the breeding ground for microorganisms associated with heat release (peat, sawdust, etc.). For this reason, a large number of explosions and fires occur during the storage of agricultural products (e.g., silage, moist hay) grain elevators. For microbiological and chemical

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Spontaneous Combustion of Coal QMIHSC 2019

Spontaneous combustion (sponcom) of coal remains a major safety issue for underground coal mining operations. Recent heating incidents in Australia further highlight the need of improving current knowledge and practices of sponcom management to ensure safety and productivity of coal mines extracting coal seams that are prone to spontaneous heating. This presentation

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SPONTANEOUS COMBUSTION OF COAL – A SOUTH AFRICAN PERSPECTIVE

energy for both South Africa and other countries the world over. Coals that are prone to spontaneous combustion, either while in-situ or following extraction are a liability in terms of safety and revenue loss for producers, shippers (carriers) and consumers. Since coal combusts in a smoldering fashion (Ohlemiller, 1990; Rein, 2009), this

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Approved Spontaneous Combustion Management Plan 2015

Spontaneous combustion has previously occurred within parts of No.2 Underground roadway, particularly near the old tunnel mouth and in the vicinity workings where broken coal was found. Mining in a manner which removes spontaneous combustion is one of the main reasons for mining at MCC.

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(PDF) Dual-hazard control mechanism of burst-prone and spontaneous combustion

Dual-hazard control mechanism of burst-prone and spontaneous combustion coalface considering effect of retreat speed . November 2021; Energy Reports 7:278-288; DOI: 10.1016/j.egyr.2020.12.033 ...

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Evolution characteristics of spontaneous combustion in ...

heat storage conditions, which are prone to spontaneous com-bustion. The caving coal and rock in the asphyxiation zone are completely compacted, with very small pore, almost no air leakage and insufficient oxygen supply, so it is difficult to spontaneous combustion. The classification of “three zones” of spontaneous combustion is the theoretical basis for pre

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Coupling simulation model between mine ventilation network ...

One of the best ways to identify the gob zone prone to spontaneous combustion is simply to analyse the ventilation flow in the gob. Spontaneous combustion could occur in a zone where the heat generated by the low-temperature oxidation of coal is inadequately dissipated by conduction or convection in the coal incubation period, which can be tested in the laboratory

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Understanding, Managing and Preventing Spontaneous Combustion

Understanding, Managing and Preventing Spontaneous Combustion There is a good deal of confusion in the mining industry regarding the key causes of Spontaneous Combustion, and just as much uncertainty around effective management and prevention strategies. The uncertainty is primarily a result of the distinctly different forms that the issue displays. Conventional rapid

More

Spontaneous Combustion of Coal QMIHSC 2019

Spontaneous combustion (sponcom) of coal remains a major safety issue for underground coal mining operations. Recent heating incidents in Australia further highlight the need of improving current knowledge and practices of sponcom management to ensure safety and productivity of coal mines extracting coal seams that are prone to spontaneous heating. This presentation

More

Research on ‘Three Zones’ of Goaf Spontaneous Combustion ...

In order to study “three zones” of goaf spontaneous combustion with U+L ventilation mode working face. Numerical simulation is used to simulate the distribution law of “three zones” of goaf spontaneous combustion in case of different distance between crossheading and working face, and different air quantity. Research suggests that the “three-zones” of spontaneous combustion

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The inducement of coal spontaneous combustion disaster and ...

ous combustion in the closed area. Timely identification of spontaneous combustion is critical. It cannot only rely on monitoring the signs of fire, which is already in the late stage that is hard to control. If not well managed, coal spon-taneous combustion not only consumes a large amount of coal resources and releases hazardous gases, but ...

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Spontaneous Combustion: Be careful with oily rags and ...

Preventing Spontaneous Combustion of Rags, Wipers and Absorbents. Like any fire, three elements are needed for spontaneous combustion: heat, fuel and oxygen. External heat sources like a match or a spark are not needed for liquids that can spontaneously combust because heat is created through the oil’s natural oxidization process. The oil and ...

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Investigation of coupled control of gas accumulation and ...

09/04/2020  Spontaneous combustion easily takes place in the goaf where the shortest period is about 20 days. C 2 H 4 and C 2 H 2 were often detected in the goaf even if many measures were used. To control the gas and spontaneous combustion in the goaf simultaneously, these measuring parameters should be optimized.

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Engine knocking - Wikipedia

Diesel fuels are actually very prone to knock in gasoline engines but in the diesel engine there is no time for knock to occur because the fuel is only oxidized during the expansion cycle. In the gasoline engine the fuel is slowly oxidizing all the time while it is being compressed before the spark. This allows for changes to occur in the structure/makeup of the molecules before the

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Work done joules force newtons x distance moved m 10Basic ...

Basic Fire Science • Spontaneous combustion • Internal chemical or biological action causes temperature rise and ignite material • Organic materials, e.g. coal, wood, paper, are prone to spontaneous combustion • Spontaneous ignition temperature • Temperature at which material will ignite spontaneously • White phosphorus is prone to auto-ignition (at normal room

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Assessment of susceptibility of coal to spontaneous ...

coal seams prone to spontaneous combustion. The susceptibility of coal to a spontaneously combustible process is considered as a feature of coal mass that can be specified by a laboratory test. Since seventies of the last century in OKR (Ostrava-Karvina Coal Field) methods according to the author Olpinski and the oxidation method under adiabatic conditions have already been

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Coupling simulation model between mine ventilation network ...

One of the best ways to identify the gob zone prone to spontaneous combustion is simply to analyse the ventilation flow in the gob. Spontaneous combustion could occur in a zone where the heat generated by the low-temperature oxidation of coal is inadequately dissipated by conduction or convection in the coal incubation period, which can be tested in the laboratory

More

Understanding, Managing and Preventing Spontaneous Combustion

Understanding, Managing and Preventing Spontaneous Combustion There is a good deal of confusion in the mining industry regarding the key causes of Spontaneous Combustion, and just as much uncertainty around effective management and prevention strategies. The uncertainty is primarily a result of the distinctly different forms that the issue displays. Conventional rapid

More

Spontaneous Combustion of Coal QMIHSC 2019

Spontaneous combustion (sponcom) of coal remains a major safety issue for underground coal mining operations. Recent heating incidents in Australia further highlight the need of improving current knowledge and practices of sponcom management to ensure safety and productivity of coal mines extracting coal seams that are prone to spontaneous heating. This presentation

More

Research on ‘Three Zones’ of Goaf Spontaneous Combustion ...

In order to study “three zones” of goaf spontaneous combustion with U+L ventilation mode working face. Numerical simulation is used to simulate the distribution law of “three zones” of goaf spontaneous combustion in case of different distance between crossheading and working face, and different air quantity. Research suggests that the “three-zones” of spontaneous combustion

More

Identification of Areas at Risk for Coal Bursts in Deep ...

That report identified coal bursts as one of the major hazards faced by miners in these operations, and found that a key step in burst control is to identify those "red zone" areas that might be prone to bursts. Continued research to develop enhanced guidelines for burst control was one of the NIOSH report's recommendations.

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The inducement of coal spontaneous combustion disaster and ...

ous combustion in the closed area. Timely identification of spontaneous combustion is critical. It cannot only rely on monitoring the signs of fire, which is already in the late stage that is hard to control. If not well managed, coal spon-taneous combustion not only consumes a large amount of coal resources and releases hazardous gases, but ...

More

Numerical modelling and rescaled range analysis on ...

coal mines are spontaneous combustion prone and highly gassy (high methane content), which may cause severe disasters, especially when mining goes increasingly deeper (Zhou et al., 2013). In highly gassy coal mines, methane drainage must be carried out before or along with mining. However, improper gas drainage may induce coal spontaneous combustion, leading to disastrous methane combustion ...

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Investigation of coupled control of gas accumulation and ...

09/04/2020  Spontaneous combustion easily takes place in the goaf where the shortest period is about 20 days. C 2 H 4 and C 2 H 2 were often detected in the goaf even if many measures were used. To control the gas and spontaneous combustion in the goaf simultaneously, these measuring parameters should be optimized.

More

Engine knocking - Wikipedia

Diesel fuels are actually very prone to knock in gasoline engines but in the diesel engine there is no time for knock to occur because the fuel is only oxidized during the expansion cycle. In the gasoline engine the fuel is slowly oxidizing all the time while it is being compressed before the spark. This allows for changes to occur in the structure/makeup of the molecules before the

More