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Liu, Chunli; Li, Shu-Shen; Qiao, Qingdang; Jingshu, Wang; Ziqiang, Pan

doi:10.1023/a:1004922620264

Cited by 25 publications

(14 citation statements)

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“…The major differences characterizing the particular examined areas included the shape, manner of construction and reclamation level. proposition of prevention techniques, have been presented [3,8,9]. The phenomenon of endogenic fire formation has complex mechanisms, and their description has been attempted on the basis of theoretical considerations, experimental results and process data related to spontaneous ignition of coal and underground fires in coal mines [10][11][12].…”

Section: Methodsmentioning

confidence: 99%

“…Strong genotoxic, mutagenic and carcinogenic properties of PAHs impose the need for constant monitoring of the content of these hydrocarbons in water, soil and air [6,7]. In the literature, the issues concerning fire hazard within the mine waste dumps, including the analysis of the causes of fire occurrence, description of ecological aspects of this phenomenon, as well as the proposition of prevention techniques, have been presented [3,8,9]. The phenomenon of endogenic fire formation has complex mechanisms, and their description has been attempted on the basis of theoretical considerations, experimental results and process data related to spontaneous ignition of coal and underground fires in coal mines [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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Assessment of Emission of Selected Gaseous Components from Coal Processing Waste Storage Site

2018

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Coal mine waste dumps are often thermally active objects with exhalation zones emitting exhaust gases, both inorganic and organic, including polycyclic aromatic hydrocarbons, phenols and BTEX hydrocarbons. The genotoxic, mutagenic and carcinogenic properties of polycyclic aromatic hydrocarbons make the monitoring of their emissions of particular importance. In this paper, the emissions of polycyclic aromatic hydrocarbons from exhalation zones of selected mine waste dumps located in Poland are presented. The experimental data set was analyzed with the application of the Hierarchical Clustering Analysis. The compounds of two-and three-cyclic hydrocarbons, such as naphthalene, acenaphthene, fluorene, phenanthrene and anthracene, were quantified in the gaseous samples tested. The compounds with a greater number of aromatic rings, such as fluoranthene, pyrene, benzo[a]anthracene and chrysene were characteristic only for some of the mine waste dumps tested.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Assessment of Emission of Selected Gaseous Components from Coal Processing Waste Storage Site

2018

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“…Injection technologies consist of the injection of fire-extinguishing agents (most often a mixture of fine-grained material and water) into the extractive waste dump through a system of previously drilled wells [72,77]. In these technologies, cased (perforated tubes) and partially cased wells [10,11,50,72] as well as bose pipes are used [50,72].…”

Section: Appropriate Technologies and Strategies For The Prevention Omentioning

confidence: 99%

The Mechanisms of Endogenous Fires Occurring in Extractive Waste Dumping Facilities

et al. 2020

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The processes of hard coal extraction and processing are accompanied by the generation of a considerable amount of post-mining extractive waste, which in most cases is deposited on the ground surface. In the past, such waste was disposed of by deposition in bings and spoil piles of various kinds. The application of modern technologies makes it possible to recycle, reuse or reclaim extractive waste in engineering works or as a substitute of natural aggregates used for the construction of different kinds of banks and embankments. Regardless of whether the waste is deposited or reused, the basic target method of waste management consists of depositing it on the ground surface. This form of extractive waste management is always associated with the risk of the occurrence of coal self-heating phenomena, which may consequently lead to an endogenous fire. Therefore, it is of critical importance to apply appropriate technologies for the construction of coal waste embankments on the one hand, and on the other hand to recognize the mechanisms responsible for the occurrence of fires in extractive waste dumps, which constitutes the subject matter of this paper.

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“…Presence of oxygen is necessary for initialization of low temperature reaction of coal oxidation. During this process, heat is generated and if it is not properly carried away, temperature of coal increases, leading to its self-ignition [7,8,9].…”

Section: Criterion On Endogenous Fire Hazardmentioning

confidence: 99%

“…Laboratory tests of coal oxidation indicated that boundary value of oxygen concentration below which self-heating did not occur is equal to 8%. Therefore, it was assumed that due to the value of oxygen concentration in the air stream flowing through the goaf with caving, particular hazardous zone of endogenous fires is presented at oxygen concentration greater or equal to 8%, whereas hypoxia zone at concentration below 8% [8,9,13,14].…”

Section: Criterion On Endogenous Fire Hazardmentioning

confidence: 99%

Determination of Particular Endogenous Fires Hazard Zones in Goaf with Caving of Longwall

Tutak

Brodny

2017

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract.Hazard of endogenous fires is one of the basic and common presented occupational safety hazards in coal mine in Poland and in the world. This hazard means possibility of coal self-ignition as the result of its self-heating process in mining heading or its surrounding. In underground coal-mining during ventilating of operating longwalls takes place migration of parts of airflow to goaf with caving. In a case when in these goaf a coal susceptible to selfignition occurs, then the airflow through these goaf may influence on formation of favourable conditions for coal oxidation and subsequently to its self-heating and self-ignition. Endogenous fire formed in such conditions can pose a serious hazard for the crew and for continuity of operation of mining plant. From the practical point of view, a very significant meaning has determination of the zone in the goaf with caving, in which necessary conditions for occurrence of endogenous fire are fulfilled. In the real conditions determination of such a zone is practically impossible. Therefore, authors of paper developed a methodology of determination of this zone basing on the results of modelling tests. This methodology includes a development of model of tested area, determination of boundary conditions and carrying out the simulation calculations. Based on the obtained results particular hazardous zone of endogenous fire is determined. A base for development of model of investigated region and selection of boundary conditions are the results of real tests. In the paper fundamental assumption of developed methodology, particularly in a range of assumed hazard criterion and sealing coefficient of goaf with caving were discussed. Also a mathematical model of gas flow through the porous media was characterized. Example of determination of a zone particularly endangered by endogenous fire for real system of mining heading in one of the hard coal mine was presented. Longwall ventilated in the "Y" system was subjected to the tests. For determined mining-geological conditions, the critical value of velocity of airflow and oxygen concentration in goaf, conditioning initiation of coal oxidation process were determined. For calculations ANSYS Fluent software based on finite volume method, which enable very precisely to determine the physical and chemical air and parameters at any point of tested mining heading and goaf with caving was used. Such precisely determination of these parameters on the base of the test in real conditions is practically impossible. Obtained results allowed to take early proper actions in order to limit the occurrence of endogenous fire. One can conclude, that presented methodology creates great possibilities of practical application of modelling tests for improvement of the occupational safety state in mine.

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Cited by 25 publications

References 0 publications

Assessment of Emission of Selected Gaseous Components from Coal Processing Waste Storage Site

Assessment of Emission of Selected Gaseous Components from Coal Processing Waste Storage Site

The Mechanisms of Endogenous Fires Occurring in Extractive Waste Dumping Facilities

Determination of Particular Endogenous Fires Hazard Zones in Goaf with Caving of Longwall

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