Experimental research on gel-stabilized foam designed to prevent and control spontaneous combustion of coal

Fuel ◽  
2019 ◽  
Vol 254 ◽  
pp. 115558 ◽  
Author(s):  
Quanlin Shi ◽  
Botao Qin
Keyword(s):  
Experimental Research ◽  
Spontaneous Combustion ◽  
Spontaneous Combustion Of Coal ◽  
And Control

The Technology of Liquid CO2 Used for Fire Prevention and the Related Device

2011 ◽  
Vol 347-353 ◽  
pp. 1642-1646 ◽  
Author(s):  
Yong Bao Shu ◽  
Wen Jun Li ◽  
Zhong Xue Li
Keyword(s):  
High Speed ◽  
Spontaneous Combustion ◽  
Fire Fighting ◽  
Fire Prevention ◽  
Stable Operation ◽  
Simple Operation ◽  
Actual Application ◽  
Fire Area ◽  
Spontaneous Combustion Of Coal ◽  
And Control

In order to avoid spontaneous combustion of coal, reduce cost and improve the effect of fire prevention and extinction, this essay brings about the technology and related device to prevent and control the spontaneous combustion of coal based on the properties of fire prevention and extinction of the liquid CO2 toward fire area, such as: asphyxiation oxygen, cooling down and inerting. The technical difficulties such as the safety packing, transportation and perfusion to the fire area underground of liquid CO2 are solved. The liquid CO2 is transported safely to the fire area underground and are infused to fire area in the form of liquid. The on site operation and test proved that the fire-fighting technology and device has the following advantages: high speed, simple operation, adjusted continuously, stable operation, and significant and reliable fire prevention effect. It accords with the actual application and has great practical value.

Experimental Research of Three-Phase Foam Fire-Fighting Technology in 7312-2 Caving Face Prevention Goal of a Coal Mine

2012 ◽  
Vol 594-597 ◽  
pp. 2257-2261
Author(s):  
Liu Jian ◽  
Ming Ming Liu ◽  
Zhen Hua Xie
Keyword(s):  
Fly Ash ◽  
Experimental Research ◽  
Coal Mine ◽  
Spontaneous Combustion ◽  
Fire Fighting ◽  
Laboratory Studies ◽  
Three Phase ◽  
Safety Production ◽  
Spontaneous Combustion Of Coal ◽  
Environmental Prevention

Spontaneous combustion of coal is a serious threat to the normal working of the mine and the safety of miners, the research to prevent spontaneous combustion of coal has a great significance. Technology based on the three-phase bubble theory, combined with characteristics of coal of 7312-2 caving face of a coal mine in Xuzhou, using laboratory studies to determination the fly ash , Wong and a variety of surfactant , then determining the formula of three-phase foam which is fit for a coal mine coal, it can restrain goal spontaneous combustion effectively and beneficial to safety production and environmental prevention.

Experiment Research of Coal’s Spontaneous Combustion Characters

2014 ◽  
Vol 1077 ◽  
pp. 66-70
Author(s):  
Yan Min Zheng ◽  
Jin Feng Zhang
Keyword(s):  
Low Temperature ◽  
Spontaneous Combustion ◽  
Control Measures ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation ◽  
Spontaneous Combustion Of Coal ◽  
Prevention And Control Measures ◽  
And Control ◽  
Dsc Curves ◽  
Heat Released

On the basis of physical oxygen uptake, use the instrument to identify the spontaneous combustion of Yang quan coal, and combination the insulation oxide of coal as well as the TG-DSC experiment to analysis of low-temperature oxidation of coal, though the DSC curves, combined with the insulation oxide experimental to analysis the size of the heat. In the end, we can come to the conclusion about the law and the different temperature parameters of the low-temperature oxidation. At the same time, the temperature when a large number of heat released by coals oxidation were also known ,and laid a theoretical foundation to develop prevention and control measures for the spontaneous combustion of coal mines.

THE EFFECT OF PEER REVIEW STRATEGY ON THE STUDENTS’ ACHIEVEMENT IN WRITING DESCRIPTIVE PARAGRAPH

2015 ◽  
Vol 4 (2) ◽  
Author(s):  
Sri Agus Murniasih And I Wayan Dirgeyasa
Keyword(s):  
Peer Review ◽  
Experimental Research ◽  
Research Method ◽  
Alternative Hypothesis ◽  
Control Group ◽  
Post Test ◽  
Class Viii ◽  
And Control ◽  
Essay Test ◽  
Experimental Group

This study was conducted to know the effect of applying Peer Review Strategy on the students’ achievement in writing descriptive paragraph. It was conducted by using experimental research method. This research design was conducted pre-test, post test in experimental and control group. The population of this research was the eight (VIII) grade students of SMP IT IQRA’ Medan. The sample of this research was taken by lottery technique. They were in class VIII-1 by experimental group and the class VIII-2 by control group. The experimental group was taught by using Peer Review Strategy while the control group was given no treatment. The instrument used to collect the data was writing essay test. The data were analyzed by using t-test formula. The result showed that the value of t-observed was higher than the value of t-table. (3,55 > 2,05 (a = 0.05)) with the degree of freedom (df) = 28. It means that there was a significant effect of applying Peer Review Strategy on the students’ achievement in writing descriptive paragraph. So, the alternative hypothesis (Ha) was accepted.

THE EFFECT OF APPLYING SQ3R METHOD ON STUDENTS’ ACHIEVEMENT IN READING COMPREHENSION

2013 ◽  
Vol 2 (2) ◽  
Author(s):  
Pranata Royganda Sihaloho And Masitowarni Siregar
Keyword(s):  
Reading Comprehension ◽  
Research Design ◽  
Conventional Method ◽  
Experimental Research ◽  
T Test ◽  
Control Group ◽  
Multiple Choice Tests ◽  
Choice Tests ◽  
And Control ◽  
Experimental Group

The aim of this study is to discover the effect of applying SQ3R method inreading comprehension. Experimental research design is used as the research method.This research took place at SMA Nasrani 2Medan. There were 2 classes chosen as thesample with 30 students in each class. The classes were divided into two groups namelyexperimental and control group. The experimental group was taught by using SQ3Rmethod and the control group was taught by using conventional method. The instrumentused to collect the data was a set of multiple choice tests, which divided as pre test andpost test. The result of the research was analyzed by using t-test formula. The resultshowed that t-test was higher than t-table (4,23>2,00) at the level of significant 0,05with degree of freedom (df) 58. It means that hypothesis alternative (Ha) is acceptedwhich shows that SQ3R method significantly improves the student’s readingcomprehension.

Sign in / Sign up

Export Citation Format

Share Document