Changes in the Distribution of Temperature in a Coal Deposit and the Composition of Gases Emitted during Its Heating and Cooling

Więckowski, Marek; Howaniec, Natalia; Postnikov, Eugene B.; Chorążewski, Mirosław; Smoliński, Adam

doi:10.3390/su10103587

Cited by 6 publications

(4 citation statements)

References 15 publications

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“…In this process, coal and other carbonaceous materials self-heat thereby resulting in ignition known as spontaneous heating. When coal is given enough oxygen, it can spontaneously heat up, and the coal can store the heat that is released (Więckowski, Howaniec, Postnikov, Chorążewski, & Smoliński, 2018).…”

Section: Spontaneous Combustionmentioning

confidence: 99%

A Review on Mine Fire Disasters and Assessment of Fire Detection Using a Dual-Cab Suppression System

Utip¹,

Li²,

Augustine³

et al. 2022

GEP

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The health and productivity of mining operations are negatively impacted by coal mine fires, making them dangerous. It happened everywhere, in both working and abandoned coal mines. This study seeks to review and provide technical analytics of potential mine fires and fire detection in a Dual-Cab suppression system. Analysis was done on potential mine fires like spontaneous combustion, flammable gas explosions, and cab vehicle fires. Additionally, a review of the NIOSH experiment was conducted to assess the performance of smoke and flame detectors in a dual-cab suppression system. This study guides both open-pit and underground mining operations. Additionally, a few ideas and suggestions are presented to assist with on-the-job safety analysis, ensuing creative alterations, and technology advancement for the mining industry's overall safety.

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Section: Spontaneous Combustionmentioning

confidence: 99%

A Review on Mine Fire Disasters and Assessment of Fire Detection Using a Dual-Cab Suppression System

Utip¹,

Li²,

Augustine³

et al. 2022

GEP

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show abstract

“…The phenomena of coal self-heating are accompanied by numerous processes hindering the appropriate assessment of fire hazard, including the natural desorption of gases from coal 7 , 8 . The main gas emitted during the process of low temperature self-heating of coal is methane, while carbon monoxide was proven and implemented as the main indicator of the development of low temperature self-ignition of coal 9 .…”

Section: Introductionmentioning

confidence: 99%

Improved method of fire hazard assessment taking into account the effect of the primary temperature of a coal seam on the desorption ratio of gas indicators

Więckowski

Howaniec

Smoliński

2022

Sci Rep

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The methods of fire risk assessment in its early phase employed so far used to take into account only the temperature of the heating of coal. The research works reported so far in this field have been conducted at ambient temperatures, without considering the rock mass primary temperature occurring in a particular coal seam and neglecting the depth of coal seams. The method for the determination of the composition of gases emitted from coal samples, employed in the study presented here, takes into account the effect of rock mass pressure, and therefore the depth of the coal seam, as well as the temperature typical for the rock mass in a particular coal mine. In the paper the results of the experimental research on the effects of the primary temperature of a coal seam on the content of gases emitted from coal, performed with the use of a specially designed experimental stand are presented. The method may be useful in developing fire hazard predictions for longwalls with residual coal in goafs. The relations between the self-ignition characteristics as well as selected physical properties of coal samples and carbon monoxide emission were also given. The research results proved that the accurate fire hazard assessment requires considering other than just self-heating of coal causes of carbon monoxide emission, including the rock mass primary temperature, which is expected to improve the existing methods of fire risk assessment in coal mines and post-mining areas.

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“…This phenomenon is connected with the process of permeability changes within the ECBM technology [7]. The transformation of pore and cleat structures of coal connected with the supercritical CO 2 leads to the increase in permeability within the zone of coal strata, which constitutes a key factor for CO 2 sequestration and the efficiency of CH 4 production [8][9][10]. Lowering the pressure of fluids in the production well and the removal of coal seam waters, which initiates the process of methane desorption accelerated by injecting CO 2 to the coal seam through the injection well, constitute the point of departure.…”

Section: Introductionmentioning

confidence: 99%

Research on the Processes of Injecting CO2 into Coal Seams with CH4 Recovery Using Horizontal Wells

et al. 2020

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The paper presents a research study on modeling and computer simulation of injecting CO2 into the coal seams of the Upper Silesian Coal Basin, Poland connected with enhanced coal bed methane (ECBM) recovery. In the initial stage of the research activities, a structural parameter model was developed specifically with reference to the coal-bearing formations of the Upper Carboniferous for which basic parameters of coal quality and the distribution of methane content were estimated. In addition, a lithological model of the overall reservoir structure was developed and the reservoir parameters of the storage site were analyzed. In the next stage of the research, the static model was supplemented with detailed reservoir parameters as well as the thermodynamic properties of fluids and complex gases. The paper discusses a series of simulations of an enhanced coalbed methane recovery process with a simultaneous injection of carbon dioxide. The analyses were performed using the ECLIPSE software designed for simulating coal seam processes. The results of the simulations demonstrated that the total volume of CO2 injected to a designated seam in a coal mine during the period of one year equaled 1,954,213 sm3. The total amount of water obtained from the production wells during the whole period of the simulations (6.5 years) was 9867 sm3. At the same time, 15,558,906 sm3 of gas was recovered, out of which 14,445,424 sm3 was methane. The remaining 7% of the extracted gas was carbon dioxide as a result of reverse production of the previously injected CO2. However, taking into consideration the phenomena of coal matrix shrinking and swelling, the total amount of injected CO2 decreased to approximately 625,000 sm3.

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Changes in the Distribution of Temperature in a Coal Deposit and the Composition of Gases Emitted during Its Heating and Cooling

Cited by 6 publications

References 15 publications

A Review on Mine Fire Disasters and Assessment of Fire Detection Using a Dual-Cab Suppression System

A Review on Mine Fire Disasters and Assessment of Fire Detection Using a Dual-Cab Suppression System

Improved method of fire hazard assessment taking into account the effect of the primary temperature of a coal seam on the desorption ratio of gas indicators

Research on the Processes of Injecting CO2 into Coal Seams with CH4 Recovery Using Horizontal Wells

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