Laboratory Investigation of Underground Fire Hazard Control in Coal Mines by Use of the Pyrotechnic Aerosol

2021 ◽  
pp. 1-15
Author(s):  
Dongjuan Ma ◽  
Yibo Tang ◽  
Huae Wang
Keyword(s):  
Laboratory Investigation ◽  
Fire Hazard ◽  
Coal Mines ◽  
Hazard Control ◽  
Underground Fire

Data Analysis and Key Parameters of Typical Water Hazard Control Engineering in Coal Mines of China

2020 ◽  
Vol 39 (2) ◽  
pp. 331-344 ◽  
Author(s):  
Lin Mou ◽  
Shuning Dong ◽  
Wanfang Zhou ◽  
Wei Wang ◽  
Ang Li ◽  
...  
Keyword(s):  
Data Analysis ◽  
Coal Mines ◽  
Control Engineering ◽  
Hazard Control ◽  
Water Hazard

scholarly journals THERMAL DEGRADATION ANALYSIS OF WOOD TREATED WITH FIRERETARDANTS

2005 ◽  
Vol 1 ◽  
pp. 295
Author(s):  
Igors Urbanovičs ◽  
Pēteris Mekšs ◽  
Gaļina Dobele
Keyword(s):  
Fire Hazard ◽  
Untreated Wood ◽  
Fire Retardants ◽  
Analytical Pyrolysis ◽  
Toxic Compounds ◽  
Wood Pyrolysis ◽  
Hazard Control ◽  
Degradation Analysis ◽  
Volatile Products

Fire hazard control in wooden constructions is very important. For this purpose, fire retardants are used, which change the thermodestruction of wood and reduce combustion. The aim of the present research project was to study and compare the fire–protective properties of fire-retardants and to explain the chemical process of pyrolysis, namely, degradation in treated and untreated wood. The influence of fire-retardants on the wood thermal stability and the amount of volatile products was estimated on the basis of thermal analysis results. The volatile products (above 50%) of the pyrolysis process were identified, and the mechanism of the influence of fire-retardants on wood thermodestruction was studied.The presence of toxic compounds, formed by pyrolysis, was evaluated. The results of the study have shown that analytical pyrolysis is a modern, precise method for identifying the toxic compounds of volatile products in processes of both wood pyrolysis and combustion. The application of analytical pyrolysis enables a prompt determination of the fire protection degree of building wood constructions.

scholarly journals Comparison of Methane Control Methods in Polish and Vietnamese Coal Mines

2018 ◽  
Vol 35 ◽  
pp. 01004
Author(s):  
Marek Borowski ◽  
Zbigniew Kuczera
Keyword(s):  
Coal Mining ◽  
Coal Dust ◽  
Coal Mines ◽  
Hard Coal ◽  
Control Methods ◽  
Prevention Measures ◽  
Methane Drainage ◽  
Hazard Control ◽  
Preventive Actions ◽  
Coal Deposits

Methane hazard often occurs in hard coal mines and causes very serious accidents and can be the reason of methane or methane and coal dust explosions. History of coal mining shows that methane released from the rock mass to the longwall area was responsible for numerous mining disasters. The main source of methane are coal deposits because it is autochthonous gas and is closely related with carbonification and forming of coal deposits. Degree of methane saturation in coal deposits depends on numerous factors; mainly on presence or lack of insulating layers in cover deposit that allow or do not on degasification and easily methane outflow into surroundings. Hence in coal mining there are coal deposits that contain only low degree of methane saturation in places where is lack of insulating layers till high in methane coal deposits occurring in insulating claystones or in shales. Conducting mining works in coal deposits of high methane hazard without using of special measures to combat (ventilation, methane drainage) could be impossible. Control of methane hazard depends also on other co-occuring natural dangers for which used preventive actions eliminate methane hazard. Safety in mines excavating coal deposits saturated with methane depends on the correct estimation of methane hazard, drawn up forecasts, conducted observations, hazard control as well as undertaken prevention measures. Methane risk prevention includes identification and control methods of methane hazards as well as means of combating the explosive accumulation of methane in longwall workings. The main preventive actions in underground coal mines are: effective ventilation that prevents forming of methane fuses or placed methane accumulation in headings ventilated by airflow created by main fans and in headings with auxiliary ventilation, methane drainage using drain holes that are drilled from underground headings or from the surface, methanometry control of methane concentration in the air; location of the sensors is defined by law, additional ventilation equipment used in places of lower intensity of ventilation and places where methane is concentrated.

scholarly journals ANALISIS SISTEM PENGENDALIAN BAHAYA CONVEYOR BELERANG DI PELABUHAN PT. PETROKIMIA GRESIK

2019 ◽  
Vol 7 (3) ◽  
pp. 368
Author(s):  
Dewangga Aji Saputra
Keyword(s):  
Control System ◽  
Fire Hazard ◽  
Data Retrieval ◽  
Working Environment ◽  
Control Measures ◽  
Safety Control ◽  
Administrative Control ◽  
Hazard Control ◽  
Workplace Accidents ◽  
The Impact

A technical and administrative control effort should be undertaken to prevent or reduce the impact of workplace accidents. Workplace accidents can be caused by unsafe human behavior and unsafe working environment conditions. This study has a general purpose for analyzing the sulfur conveyor hazard control system in PT Petrokimia Gresik. This research is observational, where as according to the way of data taking and timing of data retrieval is included in cross sectional study. The object of this research is the concession hazard control system of PT Petrokimia Gresik. In this research, I use descriptive analysis technique. The data used in this study is the primary data obtained from observations and interviews and secondary data obtained from corporate documents. The time of this research was conducted on April 20, 2015 until May 20, 2015. The result of the analysis on sulfur conveyor hazard control system in general is good. Lockout and tag out already have the tools and procedures but in its application still less and need to be improved. Emergency stop and emergency pull cord have less than 25% damage thus can be categorized well. To safeguard the fire hazard is properly installed and has good physical condition. For conveyor safety is in accordance with the standard nf en standards 294. For safety signs should be added. Administrative control measures are well implemented. Companies are advised to improve safety control efforts as there are still some need to be upgraded to either category.Keywords: analysis, control, conveyor, hazard

scholarly journals Study of the Hazard of Endogenous Fires in Coal Mines—A Chemometric Approach

Energies ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 3047 ◽  
Author(s):  
Karolina Wojtacha-Rychter ◽  
Adam Smoliński
Keyword(s):  
Clustering Analysis ◽  
Fire Hazard ◽  
Coal Mines ◽  
Principal Component ◽  
Hierarchical Clustering Analysis ◽  
Chemometric Methods ◽  
Underground Coal Mines ◽  
Endogenous Fire ◽  
Chemometric Approach ◽  
One Year

The most commonly used practice to assess fire hazard development in underground coal mines is based on the measurement of the concentration of selected gases in the mine’s air. The main goal of this study was present a strategy to monitor the gaseous atmosphere in the mine in order to identify the onset of an endogenous fire in the coal seam. For that purpose, the principal component analysis (PCA) and the hierarchical clustering analysis (HCA) were applied. The monitoring covers the measurements of concentration of CO, CO2, H2, O2, N2, and selected hydrocarbons, respectively throughout the whole of one year. The chemometric methods applied allow for effective exploration of the similarities between the studied samples collected both under fire hazard conditions and under safe conditions. Based on the constructed models, the groups of objects characterized with the highest content of ethylene, acetylene, propylene, and carbon monoxide were identified. These samples indicate the endogenic fire in coal mine.

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