scholarly journals Research on Initial Prevention of Spontaneous Combustion in Coal Bunkers Based on Fire-Extinguishing and Fireproof Inerting

ACS Omega ◽  
2022 ◽  
Author(s):  
Bo Tan ◽  
Xiaomeng Li ◽  
Xuedong Zhang ◽  
Zhaolun Zhang ◽  
Heyu Zhang
Keyword(s):  
Spontaneous Combustion ◽  
Fire Extinguishing

The Pre-Controlling Technology of Spontaneous Combustion in Gutter-Up Gob for Fully Mechanized Top-Coal Caving Face

2013 ◽  
Vol 634-638 ◽  
pp. 3688-3695 ◽  
Author(s):  
Yang Xiao ◽  
Shu Gang Li ◽  
Jun Deng ◽  
Xu Wang
Keyword(s):  
Carbon Dioxide ◽  
High Temperature ◽  
Fly Ash ◽  
Coal Mining ◽  
Spontaneous Combustion ◽  
Good Effect ◽  
Air Leakage ◽  
Coal Spontaneous Combustion ◽  
Liquid Carbon ◽  
Fire Extinguishing

In China, as popularizing the technology of fully mechanized top-coal mining and increasing the strength and depth of mining, the gutter-up gob can be formed. But the work of fire preventing and extinguishing for its coal spontaneous combustion is more complexity and difficulty. In this paper, based on geology parameters and mining practice for 93up12 fully mechanized top-coal caving face in Nantun coalmine, the form and character of gutter-up gob are analyzed. According to the hidden danger of high temperature for spontaneous combustion in the gob, we adopt the comprehension technologies of fire extinguishing and preventing which include sealing air-leakage, grouting, and injecting compound gel with fly-ash, foam of retarding oxidation, liquid carbon dioxide, and gas of nitrogen. By putting in practice the pre-controlling technology in gutter-up gob and monitoring data of target gases, it obtains a good effect and ensures the safety in production of the fully-mechanized top-coal caving face.

scholarly journals Preparation, Properties and Application of Gel Materials for Coal Gangue Control

Energies ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 557
Author(s):  
Xiaoqiang Zhang ◽  
Yuanyuan Pan
Keyword(s):  
Spontaneous Combustion ◽  
Sodium Dodecyl ◽  
Coconut Oil ◽  
Coal Gangue ◽  
Mass Ratio ◽  
Foaming Agent ◽  
Foam Stabilizer ◽  
Fire Extinguishing ◽  
Field Practice ◽  
Spontaneous Combustion Of Coal

In order to solve the problem of the spontaneous combustion of coal gangue, a coal gangue fire-extinguishing material of gel–foam was developed. The foaming agent was screened by the Waring blender method with varying foam amounts, and the superabsorbent foam stabilizer was synthesized by free radical polymerization. Moreover, the gel–foam was used in a spontaneous combustion of coal gangue mountain field practice. The results showed that when the mass fraction of sodium dodecyl sulfonate and coconut oil amide propyl betaine was 0.6% and 4:6, the foaming amount was as high as 1500 mL. When the mass ratio of chitosan to acrylic acid was 1:6, the neutralization degree was 80%, the cross-linking agent was 0.8%, and the initiator was 0.01%, the water absorption of the synthesized superabsorbent foam stabilizer reached 476 mL/g. The synthesized gel–foam was tested in a spontaneous combustion coal gangue hill in a certain area, and no reburning sign was found within one month.

Research of inorganic fire‐extinguishing materials on preventing and controlling gas and coal spontaneous combustion in the narrow coal pillar and adjacent goaf

2020 ◽  
Vol 44 (5) ◽  
pp. 660-672
Author(s):  
Wancheng Zheng ◽  
Shengqiang Yang ◽  
Weizhu Li ◽  
Jiao Wang
Keyword(s):  
Spontaneous Combustion ◽  
Coal Pillar ◽  
Coal Spontaneous Combustion ◽  
Fire Extinguishing

Inhibition of coal spontaneous combustion by an environment-friendly, water-based fire extinguishing agent

2020 ◽  
Author(s):  
Xiao-Wei Zhai ◽  
Wen-Jun Pan ◽  
Yang Xiao ◽  
Shi-rong Wang ◽  
Li-ming Ouyang
Keyword(s):  
Spontaneous Combustion ◽  
Coal Spontaneous Combustion ◽  
Environment Friendly ◽  
Fire Extinguishing ◽  
Water Based

scholarly journals Key technologies of ecological restoration and analysis of slope stability of spontaneous combustion of slag dumps in gullies

2021 ◽  
Author(s):  
Guozhen Zhao ◽  
Yiqing LYU ◽  
Shuai Wang ◽  
Chao Liu
Keyword(s):  
Slope Stability ◽  
Ecological Restoration ◽  
Safety Factor ◽  
Spontaneous Combustion ◽  
Stable State ◽  
Simulation Software ◽  
Natural Conditions ◽  
The North ◽  
Fire Extinguishing ◽  
Slag Dump

Abstract There are potential safety hazards such as spontaneous combustion, high temperature explosion, rainfall-induced landslide, and others within slag dumps in gullies, which seriously endanger the lives and property of surrounding residents. In this paper, the slag dump on the north side of Yumen River in Ximing Mine was taken as the project background. Aimed at the existing problems of environmental pollution and slope stability of the spontaneous combustion of slag dumps in gullies, the key technology of fire extinguishing by shallow jet deep hole grouting and the technology of foreign soil spray seeding with multiple soil fixation measures were put forward. The safety factor of gangue hill slopes under natural conditions, earthquakes and rainstorms was calculated by Lizheng Slope Stability Analysis Software, and the displacement field and the stress field of dangerous sections were analyzed by MIDAS GTS NX, a finite element simulation software. The calculation and analysis results show that the slope of the slag dump is in a stable state under natural conditions. Under the working conditions during earthquakes and rainstorms, the safety factor of the slope of the slag dump is decreased obviously, but the slope is still in a basically stable state. After 2 years' follow-up monitoring, the ecological restoration effect of the slag dump is good and the slope is stable.

scholarly journals Study on Spontaneous Combustion Risk of Coin Plating Experiment Residue

2020 ◽  
Vol 20 (2) ◽  
pp. 89-94
Author(s):  
Gi-Bong Ko ◽  
Si-Young Lee ◽  
Hyeong-Do Kim
Keyword(s):  
Aqueous Solution ◽  
Sodium Hydroxide ◽  
Fire Safety ◽  
Spontaneous Combustion ◽  
Waste Incinerator ◽  
Safety Education ◽  
Fire Extinguishing ◽  
Toilet Paper ◽  
Fire Experiment ◽  
Science Laboratories

This study examines the risk of spontaneous combustion caused by the residue of the coin plating experiment. In this study, three cases of recent fires due to the unauthorized disposal of the residues left from coin plating experiments in middle and high schools of the Gangwon-do Province (2017～2018) were analyzed and an experiment to recreate the fire was conducted. As a result of the analysis of the three cases of school fires, it was shown that the students who participated in the coin plating experiment wiped the aqueous solution that spilled onto the table during the procedure as well as the residue of the solution inside the beaker with a tissue and disposed of it on the classroom floor or in a plastic trash can along with the coin that was used. If short, 1 h and 18 min, if long, 8 h and 15 min after the tissues with the residues were thrown away in the trash can, a fire broke out. In addition, when the fire experiment was recreated, in a state where 5 g of sodium hydroxide and 5 g of powdered zinc were partially overlapped, 0.25 ml of water was added. After 20 min since the start of the experiment, a fire occurred as the temperature rose to 549 ℃. In particular, when the coin experiment residue was put on toilet paper and dried for 5 min using a hair dryer, a fire occurred as flames started to appear from the residue. Therefore, in order to prevent fires, it is safe to dispose of the residues after conducting the coin plating experiments in waste incinerator machines. Fire safety education must also be enforced upon teachers who are in charge of instructing chemical experiments at school, and science laboratories must be equipped with automatic fire extinguishing facilities, e.g., trash cans that are placed in the classrooms must be made of steel to ensure complete safety.

scholarly journals Distribution Law of Three Spontaneous Combustion Zones in the Goaf Area of a Fully Mechanized Working Face under High Ground Temperature

2021 ◽  
Vol 8 (2) ◽  
pp. 86-90
Author(s):  
Duolei Kuai
Keyword(s):  
Spontaneous Combustion ◽  
Middle Part ◽  
Ground Temperature ◽  
Oxidation Zone ◽  
Distribution Law ◽  
Fire Extinguishing ◽  
Working Face ◽  
O2 Concentration ◽  
Air Intake ◽  
Concentration Changes

To figure out the distribution law of three spontaneous combustion zones in the goaf area of fully mechanized working face under high ground temperature, this study took the 11501# fully mechanized mining face of Zhujixi Coal Mine as the research object, and employed software Fluent to perform numerical simulations on the O2 concentration distribution in the goaf; then, combining with the actual situations on the site, the high-location boreholes and grout holes of the roof gas drainage roadway of the 11501# working face were selected as measuring points to measure the O2 concentration changes in a few positions such as in middle part of the goaf, on the air intake side, and on the air return side. The results show that, the numerical simulation results were basically consistent with the field measurement results, in the middle part of the goaf, the scope of the oxidation zone was 26.4m-62m; on the air intake side, the scope of the oxidation zone was 32m-96m; on the air return side, the scope of the oxidation zone was 28.4m-91m. The research findings of this paper provided a scientific reference for formulating fire-prevention and fire-extinguishing technical plans for mines.

"Spontaneous combustion" of oil-based wood finishing products: Hidden or obvious hazard?

2009 ◽  
Author(s):  
Joseph Cohen ◽  
H. Harvey Cohen
Keyword(s):  
Spontaneous Combustion

Spontaneous Combustion

1877 ◽  
Vol 4 (81supp) ◽  
pp. 1285-1287
Author(s):  
Charles W. Vincent
Keyword(s):  
Spontaneous Combustion
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