Investigation of the Role of Fire Retardants in Preventing Spontaneous Heating of Coal and Controlling Coal Mine Fires

Pandey, Jai Krishna; Mohalik, N.K.; Mishra, Rakesh; Khalkho, A.; Kumar, Dilip; Singh, Virendra

doi:10.1007/s10694-012-0302-9

Cited by 90 publications

(25 citation statements)

References 10 publications

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“…Currently, the susceptibility of coal spontaneous combustion has been ranked by using different laboratory methods to assess the risk of spontaneous coal combustion. These laboratory methods include the ignition temperature method, the adiabatic oxidation method, the activation energy method, and the heat release method [18,19]. Oxygen is the key factor for coal spontaneous combustion.…”

Section: Results Analysis and Discussionmentioning

confidence: 99%

Oxygen Distribution and Air Leakage Law in Gob of Working Face of U+L Ventilation System

Zhai

Wang

Jiang

et al. 2019

Mathematical Problems in Engineering

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In order to prevent and control coal spontaneous combustion effectively in the gob of U+L working face, the 30105 working face of Hanglaiwan mine was taken as the research object. The relationship models between oxygen concentration and burial depth of the two tunnels in the gob of U+L working face were established. The distribution of oxygen in the gob of the working face of U+L ventilation system was studied by field observation combined with numerical simulation. The results show that the air leakage in the gob is serious. There are a number of fluctuation areas where the oxygen concentration first decreases and then increases in the air intake side of the gob. The oxygen concentration peaked at 100m, 175m, and 245m, respectively, from the intake side of the gob. In the same position of the gob depth, the air leakage intensity on the intake side is generally higher than that on the return side, and the oxygen concentration on the intake side of the gob is slower than the return side. Oxygen concentration maintains at 5.09% when the depth of gob reaches 400m. Measures to prevent coal spontaneous combustion should be strengthened in the air intake side.

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Section: Results Analysis and Discussionmentioning

confidence: 99%

Oxygen Distribution and Air Leakage Law in Gob of Working Face of U+L Ventilation System

Zhai

Wang

Jiang

et al. 2019

Mathematical Problems in Engineering

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“…Continuous oxygen is one of the essential conditions for spontaneous combustion of a coal seam [1,2]. Mine fire or coal fires are induced by the air leakage passages that provide oxygen for loose coal [3].…”

Section: Introductionmentioning

confidence: 99%

Study of the Penetration and Diffusion Characteristics of Inorganic Solidified Foam in Rock Fractures

Lü

Wang

2017

Advances in Materials Science and Engineering

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To explore the penetration and diffusion law in coal and rock fractures when inorganic solidified foam (ISF) is used to prevent coal fire, the penetration experiment was conducted; the results showed that the penetration pressure fluctuates within a certain range and decreases with the diffusion distance. In the plane, the diffusion pattern presents an ellipsoid shape, and the diffusion area becomes increasingly large over time; in the plane, the foam fluid penetration changes from dense to loose in the direction and it does not undergo downward penetration and diffuses via its own weight in the direction; in the plane, it is loose on the left and dense on the right. The viscosity of ISF was tested and then the time-varying formula was fitted. The formula of the effective diffusion radius for foam fluid diffusing in the fracture channel was determined theoretically. The permeability coefficient and other related parameters were calculated in terms of the penetration pressure and diffusion time of two monitoring points. At last, the prediction formula of effective diffusion distance of foam fluid was verified with the remaining seven monitoring points and all the relative error of monitoring is within 10%.

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“…At present, the major goaf fire prevention and extinguishing technologies are as following: plugging and pressure balance fire prevention and extinguishing technology [3], grouting fire prevention and extinguishing technology [4], inhibitor fire prevention and extinguishing technology [5], gel fire prevention and extinguishing technology [6], three-phase foam fire prevention and extinguishing technology [7], inert gas fire prevention and extinguishing technology [8,9], etc. Different techniques are difficult to achieve good results between the control effects and the economic benefits [10].…”

Section: Introduction Mmentioning

confidence: 99%

Experimental Study on Extinguishing Spontaneous Combustion of Residual Coal in Goaf by Nitrogen-water Mist two-phase Flow

Liu¹,

Wang²,

Liu³

2017

JRST

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ABSTRACT:In order to clarify the effect of nitrogen-water mist two-phase flow on extinguishing spontaneous combustion of residual coal, experiments were carried out in similarity model of mine goaf by using self-designed device. The experimental results indicated that the average cooling rates of 1-6# K type thermocouple temperatures in goaf were 24.6°C/min, 8.3°C/min, 4.2°C/min, 12.3°C/min, 8.1°C/min and 19.2°C/min during the period of 55-80 min when nitrogen-water mist was applied to combustion area. After the application of nitrogen-water mist, the consumption rate of O 2 in the experiment was reduced from 3.16 × 10 -4 m 3 /s to 1.41 × 10 -4 m 3 /s; the generation rates of CO, CO 2 were reduced from 3.91 × 10 -5 m 3 /s, 1.74 × 10 -4 m 3 /s to 1.69 × 10 -6 m 3 /s, 6.57 × 10 -6 m 3 /s, respectively; the generation rate of H 2 was reduced from 1.41 × 10 -5 m 3 /s to 3.6 × 10 -8 m 3 /s; the emission rate of CH 4 was reduced from 1.05 × 10 -5 m 3 /s to 7.78 × 10 -7 m 3 /s. The experimental results suggested that nitrogen-water mist could effectively suppress the burning of coal and reduce the generation amount of toxic and harmful gas in mine goaf.

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Investigation of the Role of Fire Retardants in Preventing Spontaneous Heating of Coal and Controlling Coal Mine Fires

Cited by 90 publications

References 10 publications

Oxygen Distribution and Air Leakage Law in Gob of Working Face of U+L Ventilation System

Oxygen Distribution and Air Leakage Law in Gob of Working Face of U+L Ventilation System

Study of the Penetration and Diffusion Characteristics of Inorganic Solidified Foam in Rock Fractures

Experimental Study on Extinguishing Spontaneous Combustion of Residual Coal in Goaf by Nitrogen-water Mist two-phase Flow

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