Coal Dust Explosion Fault Tree Analysis
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Coal Dust Explosion Fault Tree Analysis

Coal dust explosion

Coal dust concentration reaching the

minimum explosive concentration

and

or

Increase of coal dust

concentration

High temperature ignition

source

Decline of coal dust minimum

explosive concentration

or

and

Generation of

excessive coal dust

Failure of coal dust

control

X2

X4

X3

X5

X6

and

or

or

X7

X9

X10

X8

Re-entrainment of

coal dust

and

X11

X12

Coal dust generated during

the process of mining

or

Coal dust generated during the process of tunneling

Coal dust generated during

the machine mining process

Briquette being dry

Coal dust generated during the

process of loading and transportation

or

or

or

X13

Mining technique

being inappropriate

Failure of coal

dust removal

X14

X15

Failure of coal

dust removal

X16

or

or

or

X17

X18

X20

X21

X19

X23

X24

X22

A

B

X1

A

or

Blasting technique

being not required

Blasting material

being not required

or

or

Fire caused by blasting

or

X33

X34

X35

X36

Electric spart

or

Mechanical spart

X27

X28

X25

or

X37

X38

Anthropogenic

causes

or

X31

X32

or

Open fire

X19

Welding flame

or

X29

X30

B

or

Coal dust generated

during blasting digging process

Failure of coal

dust removal

Coal dust generated

during machine digging process

or

or

Improper operation

or

Improper operation

Failure of coal

dust removal

or

or

or

X40

X46

X47

X48

X49

X50

X44

X45

X41

X42

X43

X39

(A)

(B)

(C)

Blasting technique

being not required

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publish time: 2021-05-20
easy diagrams

As shown in the attached diagram, a coal dust explosion fault tree analysis (FTA) diagram is a top-down deductive failure analysis in which an undesired state of a system is analyzed using Boolean logic to combine a series of lower-level events. Fine bituminous coal dust is highly explosive when suspended in the air. In a typical coal dust explosion, as shown in the fault tree analysis diagram, the dust is scoured by a small methane gas explosion, which also provides the initiating flame. Once started, a coal dust explosion can propagate through vast areas of the mine by swirling new coal dust into the air in front of the explosion flame. The fault tree analysis is of high significance in the analysis of accidental coal mine explosions and provides theoretical guidance for improving the efficiency of coal mine safety management in a feasible manner.

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