Method for preventing spontaneous combustion of coal gangue

Method for preventing spontaneous combustion of coal gangue

Frm Download File New PDF Complex Number Force

Natural occurrence of metals minerals ores of iron aluminium and copper gangue ma trix Definition of fuel and combustion of fuel classification of fuels calorific values HCV and LCV calculation of HCV and LCV using Dulong s formula Proximate analysis of coal solid fuel petrol and diesel fuel rating octane and

gob gob gob

Deformation analysis and treating measures to gob areas of coal mine under freeway A digital simulation is made to the rock pressure distribution of faces with large mining height when crossing gob which may guide engineering practice

PDF Study on Thermodynamic Characteristics and Heat Transfer Method of

spontaneous combustion of coal gangue mountain based on the research idea of heat transfer and cooling the prevention and control methods are carried out focusing on the kinetic characteristics of uncontrolled spontaneous combustion and heat transfer process of coal gangue mountain †e scientic management of re has important

CN101644158B Heap storage method for preventing spontaneous

The invention relates to a coal gangue hill control technology in particular to a heap storage method for preventing spontaneous combustion of a coal gangue hill thereby solving the problems that the existing heap storage way is easy to cause the spontaneous combustion of the free surface and the edge of a hill body and once one place occurs the spontaneous combustion a plurality of places

Prevention and Control Module for Spontaneous Combustion of Coal at

Spontaneous combustion of coal is a common concern within the coal stockyard of thermal power plants due to the direct effect that energy losses have on financial performance As coal is the primary fuel for a thermal power plant adequate emphasis needs to be given for its proper handling and storage It s also essential because of related safety and environmental implications of spontaneous

Method of preventing spontaneous combustion when storing coal

Method of preventing spontaneous combustion when storing crushed coal which contains sulphur in the form of pyrites FeS2 in a content exceeding 3% by weight and moisture in a content exceeding 10% by weight The pyrites is oxidized by atmospheric oxygen and forms sulphur trioxide which combines with water and forms sulphuric acid Oxidation and as a result spontaneous combustion are

CN111760217A Power generation equipment for preventing and

The invention discloses a power generation device and a control method for preventing spontaneous combustion of a coal gangue dump and heat recovery wherein the power generation device comprises a circulating liquid heat transfer working medium supply system a double sleeve sealing pipe drilling and sealing heat exchange system a temperature monitoring and intelligent control system and a

A new theory of chemical method to prevent spontaneous combustion of coal

in order to prevent spontaneous combustion of coal from the source based on the study on the mechanism of spontaneous combustion of coal especially the process of coal

How to mitigate spontaneous combustion in Coal stockpiles

2use water or mosture or foam to disrupt the thermal gain the propellant of sponcom is dry air substitute moist air or wet the coal 3use an inert gas like N2 or CO2 to distrupt the

Study on Spontaneous Combustion Characteristics of Waste Coal Gangue

In order to provide theoretical guidance for controlling spontaneous combustion in coal gangue hills this study investigated the characteristic of spontaneous combustion The variations of temperature at different depths were obtained through arranging temperature measurement boreholes in the coal gangue hill and observing for 30 days

CN104027912A Slow release compound oxidation inhibitor for preventing

The invention relates to slow release compound oxidation inhibitor for preventing spontaneous combustion of coal gangue and an application amount thereof and belongs to the field of mine pollution recovery technology and application The inhibitor adopts water retaining agent to absorb compound oxidization inhibitor to form saturated gel with minimal oxidation inhibition concentration the

Investigation of thermal behavior and hazards quantification in

Coal or CG with a combustible component of % has the greatest hazard of SCFs Abstract To explore the thermal behavior and hazard during the spontaneous combustion fires SCFs of coal and coal gangue CG the characteristics of heat release and thermal transfer during the SCFs of coal and CG were tested

Experimental and theoretical study on kinetic behaviour of coal gangue

To reduce the oxygen supply and heat accumulation tremendous efforts are devoted to coal waste fire control by implementing extensive fire fighting technologies including loess isolation and applying grouting slurries [ 9 ]

Study on condition analysis and temperature prediction of coal

A comprehensive method to prevent top coal spontaneous combustion utilizing dry ice as a fire extinguishing medium Test apparatus development and field application Environ Sci Pollut Res Int 29 13 19741 19751 2024

Co spontaneous combustion of coal and gangue Thermal behavior kinetic

The results illustrated that the appropriate addition of MSW can improve the combustion efficiency and when the mixing ratio of MSW was 20% it can minimize the co emission In addition Xiao et al [34] observed that oxygen concentration and heating rate would affect the co combustion process of sludge and gangue

Method for preventing spontaneous combustion of coal gangue

the content of spontaneous combustion coal gangue on the water absorption of concrete The result shows that both of them have a significant effect on the water absorption of spontaneous combustion coal gangue concrete Jisheng et al [15] study the capillary water absorption performance of coal gangue concrete under freeze thaw

Numerical Simulation of the Dynamic Change Law of Spontaneous

To further study the problem of spontaneous combustion of coal gangue mountains a multifield coupled simulation model was established based on the mathematical models of temperature field gas concentration field and seepage velocity field In addition the dynamic development law of these three p …

Reference Test Method for Calculating the Thermal Effect of Coal

Aiming at the problems existing in the research field of the thermal effect of coal spontaneous combustion and oxidation based on the leading heating and reference test methods this paper effectively tests the thermal effect of coal spontaneous combustion by constructing a physical similarity reference test experimental system

Analysis on Explosion Characteristics of Coal Gangue Hills

therefore the influencing factors on the coal gangue hill explosion the explosion characteristics and laws and the spontaneous combustion process of the coal gangue hill are analyzed the coal gangue hill explosion are discussed from the arch shell theory the bottom air leakage and oxygen supply rainfall detonating gas explosion and chain …

Numerical Simulation of Coal Spontaneous Combustion around a Borehole

The coal seam easily undergoes spontaneous combustion The buried depth of the No 15 coal seam in the 24130 working face is 1200 m The gas drainage method mainly adopts the through layer predraining gas technology and the gas prevention technology in the working face

Risk identification of coal spontaneous combustion based on COWA

The G1 method is a subjective weighting method that can reflect the importance of indicators 26 The calculation steps are as follows 1 Experts sorted the importance of evaluation

Internal Temperature Variation on Spontaneous Combustion of Coal Gangue

Coal gangue spontaneous combustion is a serious catastrophe associated with mining activities Generally the areas of coal gangue spontaneous combustion are regions of tremendous heat accumulation Mastering the regularity of deep temperature distribution and eliminating internal heat is an effective method to control spontaneous combustion

Numerical Simulation of the Dynamic Change Law of Spontaneous

Abstract To further study the problem of spontaneous combustion of coal gangue mountains a multifield coupled simulation model was established based on the mathematical models of temperature field gas concentration field and seepage velocity field

Journal of Coal Science and Engineering China

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Environment influences and extinguish technology of spontaneous

In fire extinguishing process loess isolation is used to prevent spontaneous combustion area from enlarging loess cover reduces the air leakage in the spontaneous combustion area of Coal Gangue Heaps and borehole grouting and trenching grouting reduce heat quantity of the spontaneous combustion area

PDF SPONTANEOUS COMBUSTION OF COAL University of the Witwatersrand

Spontaneous combustion is a huge problem in the coal industry where the resource is often stored or transported in large piles so understanding and preventing res is important There are many factors which may contribute to spontaneous combustion including pile size atmospheric moisture content wind coal type internal heat and

A Study on Preventing Spontaneous Combustion of Residual Coal in a Coal

The effectiveness of grouting scheme has been simulated to prevent the coal spontaneous combustion at a goaf in Haizi Colliery China The colliery has been operated for long period over 27 years and has a complex ventilation network including airflow leakages which could possibly lead to the spontaneous combustion of coal at goafs Firstly the mine ventilation simulator MIVENA was used to

Preparation of a Gangue Based X‑type Zeolite Molecular Sieve

Coal gangue is a byproduct of coal mining and processing various industrial processes leading to the generation of large which is unavoidable due to limitations of the existing technical amounts of wastewater contaminated with these chemicals conditions and emissions are on the The accumulation Methylene blue [3 7 bis dimethylamino

A novel high polymer nanocomposite inhibitor for coal gangue

This research aims to study a new type of polymer nanocomposite inhibitor to prevent and control coal gangue spontaneous combustion Nanomodification of montmorillonite MMT was carried out on high polymer emulsion inhibitor polyacrylamide PAM to improve its thermal stability and overcome the short inhibition duration problem

Laboratorial Investigation and Simulation Test for Spontaneous

As a typical solid waste coal gangue is highly susceptible to spontaneous combustion Conventionally method for controlling spontaneous combustion of coal gangue is to inhibit the oxidation and self heating of gangue by utilizing soil covering to isolate the gangue from oxygen

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