THE PRESENT SITUATION AND FUTURE OF MINE VENTILATION TECHNOLOGY IN CHINA.

THE PRESENT SITUATION AND FUTURE OF

MINE VENTILATION TECHNOLOGY IN

CHINA

THE PRESENT SITUATION AND FUTURE OF

MINE VENTILATION TECHNOLOGY IN

CHINA

OUTLINEOUTLINE

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THE IMPORTANCE OF COAL MINE VENTILATION

THE PRESENT SITUATION OF COAL MINE VENTILATION TECHNOLOGY IN CHINA

THE FUTURE OF COAL MINE VENTILATION TECHNOLOGY IN CHINA

ACKNOWLEDGMENTS

1 THE IMPORTANCE OF COAL MINE VENTILATION

1.1 Component and Targets of Coal Mine Ventilation

Components: Including fan, ventlation network, ventlation

establishment , Monitoring System. etc .

Target 1: During normal production period, provide fresh air to

mine continuously, to ensure the tempertaure, methane and dust

under safe limitation.

Target 2: During accidents period, control of the amount of wind

direction and wind timely and effectively, Prevent the expansion

of disasters, and reduce casualties and property losses.

Components: Including fan, ventlation network, ventlation

establishment , Monitoring System. etc .

Target 1: During normal production period, provide fresh air to

mine continuously, to ensure the tempertaure, methane and dust

under safe limitation.

Target 2: During accidents period, control of the amount of wind

direction and wind timely and effectively, Prevent the expansion

of disasters, and reduce casualties and property losses.


1.2 Effects of ventilation in several major mine accidents

Chain reactions of ventilation, methane, fire,

explosions.

air leak ＋ coal oxidation → spontaneous combustion

＋ oxygen ＋ methane→explosion

air ＋ fire→ fire accident ＋ methane→explosion

Chain reactions of ventilation, methane, fire,

explosions.

air leak ＋ coal oxidation → spontaneous combustion

＋ oxygen ＋ methane→explosion

air ＋ fire→ fire accident ＋ methane→explosion


1.3 The particularity and importance of ventilation to current

mining environment

Ventlation parameters always changing in time and space;

（ Requires dynamic management ）Ventilation network is too big and complex;

（ Requires graphical show ）Traditional manual mensure and table management could not

fulfill modern mine production, especially to deep and coal

seams mine ；（ Traditional technology could not protect

ventilation to be credible ）

All of this requires more advanced technology

Ventlation parameters always changing in time and space;

（ Requires dynamic management ）Ventilation network is too big and complex;

（ Requires graphical show ）Traditional manual mensure and table management could not

fulfill modern mine production, especially to deep and coal

seams mine ；（ Traditional technology could not protect

ventilation to be credible ）

All of this requires more advanced technology

2THE PRESENT SITUATION OF COAL MINE VENTILATION TECHNOLOGY IN CHINA

2.1 History of China ventilation technology

China’s mine ventilation technology has a long history more than 3000

years.

Both Phoenix mountains mining sites and Daye mining sites have,

natural ventilation system ， more than 3000 years.

Chinese mining industry and ventilation technology has a Sharp

increase during the 18-19 century Industrial Revolution in Europe.

After long-term accumulation and continuous, ventilation plays an

important role in coal mine production.

China’s mine ventilation technology has a long history more than 3000

years.

Both Phoenix mountains mining sites and Daye mining sites have,

natural ventilation system ， more than 3000 years.

Chinese mining industry and ventilation technology has a Sharp

increase during the 18-19 century Industrial Revolution in Europe.

After long-term accumulation and continuous, ventilation plays an

important role in coal mine production.

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2.2 Policy guidelines of China ventilation technology

Methane is one of the biggest hazards in China now, as to

methane, there are 2 policies as follows:

Policy 1: first deflating then mining, outputs based on

ventilation, monitoring and control.

Policy 2: credible ventilation, deflating and mining are regular,

efficient management, efficient monitoring .

Methane is one of the biggest hazards in China now, as to

methane, there are 2 policies as follows:

Policy 1: first deflating then mining, outputs based on

ventilation, monitoring and control.

Policy 2: credible ventilation, deflating and mining are regular,

efficient management, efficient monitoring .


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2.2 Policy guidelines of China ventilation technology


Outputs based on ventilation is defined as the core of mine

ventilation management, includes 2 parts: Change of outputs is calculated by the actual air-flux of mine and

whole mining working faces.

Reason of lack of air: change of working conditions （ such as forecasting methane is to

be lower ） change of outputsHave reasonable ventilation mode and system.

Outputs based on ventilation has 3 levels ：All of the working faces have enough air by their actual needsReasonable area ventilation systemReasonable mine ventilation mode and system

Outputs based on ventilation is defined as the core of mine

ventilation management, includes 2 parts: Change of outputs is calculated by the actual air-flux of mine and

whole mining working faces.

Reason of lack of air: change of working conditions （ such as forecasting methane is to

be lower ） change of outputsHave reasonable ventilation mode and system.

Outputs based on ventilation has 3 levels ：All of the working faces have enough air by their actual needsReasonable area ventilation systemReasonable mine ventilation mode and system

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2.3 Present situation of China ventilation technology


China ventilation technology

Ventilation monitoring system

Establishments of ventilation system

Dynamic simulation and analysis of ventilation net

work

Fast manual measure of ventilation parameters

Ventilation mode

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2.3.1 Ventilation mode


Ventilation mode

Could be divided into Y mode, W mode, Z mode, H mode, etc, all based on ventilation technology to solve methane

Could be divided into Y mode, W mode, Z mode, H mode, etc, all based on ventilation technology to solve methane

Could be divided into center, center-boundary, center-diagonal, etc, all based on the location relationship between intake shaft and air-return shaft

Could be divided into center, center-boundary, center-diagonal, etc, all based on the location relationship between intake shaft and air-return shaft

Could be divided into push system, pull system and push-pull system, all based on the working mode of main fan

Could be divided into push system, pull system and push-pull system, all based on the working mode of main fan

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center, center-boundary, center-diagonal, etc.center, center-boundary, center-diagonal, etc.

center center-boundary center-diagonal territorial

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push system, pull system and push-pull system.push system, pull system and push-pull system.

pull systempush system push-pull system

Setting assistant fan under mine when resistance is too high.

no matter what kind of ventilation mode, it’s necessary to decrease the dynamic pressure loss of air-return shaft.

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Y mode, W mode, Z mode, H mode, etcY mode, W mode, Z mode, H mode, etc

U mode Y mode

H mode

W mode

Z mode

There are more than 10 modes which includes ： U mode （ advancing, retreating ）、 Z mode （ advancing, retreating ）、 Y mode （ advancing, retreating ）、W mode （ 2 advancing 1 retreating 、 1 advancing 2 retreating ） .

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2.3.2 Establishment of ventilation system


Establishment of ventilation system

Main fansMain fans

Booster fansBooster fans

Ventilation door ， Air regulators （ long-distance control ）

Ventilation door ， Air regulators （ long-distance control ）

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Main fansMain fans

Long axis fans cyclone

fans

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Single

level

Double

level

Several

level

Cyclo-ne

Intelli-

gent

Lownoise

Cyclo-ne of

plasti-c

Booster fansBooster fans

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2.3.2 Establishments of ventilation system


4 kinds ： long push short pull, long pull short push, long push short push, long pull short pull.

4 kinds ： long push short pull, long pull short push, long push short push, long pull short pull.

long pull short push

long pull short pull

long push short pull

long push short push

Using of booster fans(To dilute methane, cool air, remove dust.etc)

Using of booster fans(To dilute methane, cool air, remove dust.etc)

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2.3.2 Establishments of ventilation system


Ventilation door ， Air regulators （ controlled by host computer ）

Ventilation door ， Air regulators （ controlled by host computer ）

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2.3.3 Ventilation monitoring system


Ventilation monitoring system

Monitoring systemMonitoring system

Main fans monitoring systemMain fans monitoring system

Booster fans monitoring systemBooster fans monitoring system

Wind speed and direction sensorWind speed and direction sensor

Wind pressure sensorWind pressure sensor

Booster fans flux sensorBooster fans flux sensor

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Monitoring systemMonitoring system

Substation

Host computer

Speed and direction sensor

Pressure sensor

http://www.iciba.com/substation




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Main fans monitoring systemMain fans monitoring system

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Booster fans monitoring systemBooster fans monitoring system

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Wind speed and direction sensor

Mainly used to measure wind speed,

wind direction of main roadway;

Very long-time to continue monitor;

Wind speed measure range ： (0.2 ～

15)m/s ；Precision ： 0.1m/s ；Max measure range ： 750 m3/s 。

Wind speed and direction sensorWind speed and direction sensor

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Booster fans flux sensor

Mainly used to measure wind speed,

and monitor the open & close status of

booster fans;

Very long-time to continue monitor ；Wind speed measure range ： 20 ～

999 m3/min ；Precision:1 m3/min.

Booster fans flux sensorBooster fans flux sensor

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Wind pressure sensor

Mainly used to measure pressure of

important places;

Very long-time to continue monitor ；Pressure measure range ： -5000~5000 pa ；Precision: 10 pa ；Has 4 kinds of signal output modes.

Wind pressure sensorWind pressure sensor

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2.3.4 Fast manual measure of ventilation parameters


Fast manual measure of ventilation parameters

High precision barometerHigh precision barometer

Laser range finderLaser range finder

High precision wind speed and direction sensorHigh precision wind speed and direction sensor

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High precision barometer (Pressure fast measure in resistance measure works)High precision barometer (Pressure fast measure in resistance measure works)

JFY-2 pressure sensor

JFY-4 pressure sensor

Parameters Range Precision

temperature 0℃—40℃4 ±1.0℃

wind speed0.4—5m/s ±0.2m/s

5—10m/s ±0.3m/s

>10-15m/s ±0.4m/s

Pressure difference-3500 ～ +3500

Pa±2%

Pressure 95-120KPa ±2%

Parameters Range Precision

Absolute pressure 600-1200 hpa ±1hpa

Relative pressure ±400mmH2O ±1mmH2O

temperature -10℃~40℃ ±0.5℃

humidity 50%~99%RH ±4%RH

wind speed 0.6~15m/s ±0.2-0.5m/s

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High precision wind speed and direction sensor

Mainly used to measure wind speed

of danger ,such as no wind, little wind,

and Worked-out area;

Very long-time to continue monitor ；Wind speed measure range ： 0.2~15

m/s ；Precision ： ±0.2 -0.4 m/s.

High precision wind speed and direction sensor(Wind speed fast measure in resistance measure works)

High precision wind speed and direction sensor(Wind speed fast measure in resistance measure works)

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Laser range finder

Mainly used to measure size of

roadway;

Distance measure on the ground ：

0.001~200 m ；Distance measure under ground ：

0.001~100 m ；Precision ： 0.001 m ；

Laser range findersize fast measure in resistance measure works

Laser range findersize fast measure in resistance measure works

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2.3.5 Dynamic simulation and analysis of ventilation net work


Dynamic simulation and analysis of ventilation net

work

Network simulationNetwork simulation

Dynamic monitoring and calculationDynamic monitoring and calculation

Problems analysis and warningProblems analysis and warning

Dynamic two-dimensional and three –dimensional showDynamic two-dimensional and three –dimensional show

Report forms auto creatingReport forms auto creating

Network map specialization drawingNetwork map specialization drawing

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Imitate

CAD

mode

Inport

CAD

map

Easy

to

draw

Easy

to

learn

Map specialization drawing easy to learn ,easy to draw, it is fit for miners those who have little

knowledge.

Map specialization drawing easy to learn ,easy to draw, it is fit for miners those who have little

knowledge.

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Report forms auto creating this system can store data and data report forms creating automatically.

Report forms auto creating this system can store data and data report forms creating automatically.

Data

auto store

Data

auto

classify

Data

Inquiring &

modifying

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Network simulation provide optimizing schemes for ventilation system change, such an connect 2 heading faces or close some old roadways .

Network simulation provide optimizing schemes for ventilation system change, such an connect 2 heading faces or close some old roadways .

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Monitoring+dynamic calculation+ analysis+show Monitoring some wind parameters of important places by advanced equipments, then doing dynamic calculation, analysis, and show some relating changing wind parameters.


1.5 1.451.511.53

Basic data

Dynamic monitoring data

Dyna-

mic

calcul

-ation

monitoring data analysis

calculating data analysis

Dyna-

mic

show

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Problems analysis and warning Problems analysis and warning

Monit-

oring

data

Calcu-

lating

data

Speed

out of

limit

flux

out of

limit

Press

-ure

out of

limit

short

circuit

wind

Cycle

wind

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Three–dimensional dynamic show All of the wind imformation could be seen on the three–dimensional dynamic map. And could make yourselves into the roadway.

Three–dimensional dynamic show All of the wind imformation could be seen on the three–dimensional dynamic map. And could make yourselves into the roadway.

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3.1 The future


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3.2 Ventilation monitoring

Monitoring data

wireless

transfer

Monitoring data

moment

transfer

Monitoring data

Share to all

instantly

Establish a

special subsystem for ventilat

ion


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Bigger power, larger flux,

higher pressure;

more stable wind;

It could change the vane angle

of fans itself by actual situations

of mine.


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Could be used to all place of

the mine for long time;Nearly no fixing;Speed range: 0.05~60 m/s;Precision: ±0.05 m/s;Direction range: 360°.


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Could be used to all place of

the mine for long time;Nearly no fixing;Pressure range: -5000~5000 Pa ；Precision: ±1 Pa 。


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3.3 Intelligent monitoring & controlling

Wind Speed & methane concentration out of limit 、

Doors & Air regulators are controlled by host computer

Doors & Air regulators are controlled by host computer


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3.4 Effects when emergency

Outb-urst

Outb-urst

Explo-sionsExplo-sions

firefire …………

Best escape routes

Best escape routes

Best rescue routes

Best rescue routes

Intelligent escape routes

indicator

Intelligent escape routes

indicator

…………


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3.5 End


4 ACKNOWLEDGMENTS

THE PRESENT SITUATION AND FUTURE OF MINE VENTILATION TECHNOLOGY IN CHINA.

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