Prediction and Control of Coal Spontaneous Combustion in a Multi-fault Fully Mechanized Top Coal Caving Face at the Mine Field Boundary

2020 ◽  
pp. 1-19
Author(s):  
Jianhua Zhang ◽  
Xiaojiao Cheng ◽  
Hu Wen ◽  
Wen Wang
Keyword(s):  
Spontaneous Combustion ◽  
Field Boundary ◽  
Coal Spontaneous Combustion ◽  
Mine Field ◽  
Prediction And Control ◽  
And Control

scholarly journals Oxygen Distribution and Air Leakage Law in Gob of Working Face of U+L Ventilation System

2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Xiaowei Zhai ◽  
Bo Wang ◽  
Shangrong Jiang ◽  
Weixia Zhang
Keyword(s):  
Oxygen Concentration ◽  
Spontaneous Combustion ◽  
Ventilation System ◽  
Burial Depth ◽  
Air Leakage ◽  
Coal Spontaneous Combustion ◽  
Working Face ◽  
Air Intake ◽  
And Control ◽  
The Relationship

In order to prevent and control coal spontaneous combustion effectively in the gob of U+L working face, the 30105 working face of Hanglaiwan mine was taken as the research object. The relationship models between oxygen concentration and burial depth of the two tunnels in the gob of U+L working face were established. The distribution of oxygen in the gob of the working face of U+L ventilation system was studied by field observation combined with numerical simulation. The results show that the air leakage in the gob is serious. There are a number of fluctuation areas where the oxygen concentration first decreases and then increases in the air intake side of the gob. The oxygen concentration peaked at 100m, 175m, and 245m, respectively, from the intake side of the gob. In the same position of the gob depth, the air leakage intensity on the intake side is generally higher than that on the return side, and the oxygen concentration on the intake side of the gob is slower than the return side. Oxygen concentration maintains at 5.09% when the depth of gob reaches 400m. Measures to prevent coal spontaneous combustion should be strengthened in the air intake side.

Numerical Simulation and Backfilling Materials Research on Coal Spontaneous Combustion of Thick Seam Large-Scale Top-Caving Region in Resources Conformity Coal Mine

2012 ◽  
Vol 524-527 ◽  
pp. 317-320
Author(s):  
Bo Tan ◽  
Yuan Gang Jiang ◽  
Chao Nan He ◽  
Jing Chang ◽  
Ya Qi Luo
Keyword(s):  
Numerical Simulation ◽  
Process Model ◽  
Large Scale ◽  
Spontaneous Combustion ◽  
Combustion Process ◽  
Fire Control ◽  
Coal Spontaneous Combustion ◽  
Thick Seam ◽  
Materials Research ◽  
And Control

This paper aimed at fire control in thick seam large-scale top-carving region. On the basis of coal and oxygen compounding theory, theoretical analysis, numerical simulation and experiment are combined, and a coal spontaneous combustion process model is built according to fluid mechanics and control theory. By studying and testing on top-carving coal spontaneous combustion process, conclusion is drawn that spontaneous combustion area is the largest in partly-closed region, followed by unclosed region. A totally closed baffle leads to the smallest spontaneous combustion area and the smallest possibility of fire. With local materials in a certain condition, new, cheap backfilling materials are developed. Thus provide theoretical basis for study on the forecasting and prevention of thick seam large-scale top-carving coal spontaneous combustion.

Characteristics of Foamed Gel for Coal Spontaneous Combustion Prevention and Control

2017 ◽  
Vol 189 (6) ◽  
pp. 980-990 ◽  
Author(s):  
Leilin Zhang ◽  
Biming Shi ◽  
Botao Qin ◽  
Qing Wu ◽  
Vanchi Dao
Keyword(s):  
Prevention And Control ◽  
Spontaneous Combustion ◽  
Coal Spontaneous Combustion ◽  
And Control

Coal Spontaneous Combustion Mechanism and Research of New Flame Retardant Material

2014 ◽  
Vol 513-517 ◽  
pp. 156-160 ◽  
Author(s):  
Wen Hua Pang ◽  
Ru Xiang Qin
Keyword(s):  
Flame Retardant ◽  
Spontaneous Combustion ◽  
Material Selection ◽  
Research Direction ◽  
Combustion Mechanism ◽  
Heat Accumulation ◽  
Coal Spontaneous Combustion ◽  
Radical Chain ◽  
Free Radical Chain Reaction ◽  
And Control

According to analyzing the mechanism coal of spontaneous combustion,Concluded three ways for the prevention and control of coal spontaneous combustion: (1) the elimination of heat accumulation; (2) reduce the oxygen concentration; (3) the blocking free radical chain reaction; And based on the mechanism of flame retardant summarized the types of the inhibitor agent and the inhibitor agent resistance effect, this paper briefiy introduces the research status of the inhibitor agent, and points out the problems existing in the flame retardant materials, put forward material selection problens of a new flame retardant materials and research direction in the future.

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