GENERAL SAFETY IN MINES - PowerPoint Presentation

Slide1

GENERAL SAFETY IN MINES

FOR CANDIDATES APPEARING FOR DGMS COAL FIRST CLASS/SECOND CLASS

EXAM

By

Ranjan

Kumar

Asst

Manager ,CCLSlide2

SYLLABUS

SAFETY IN MINES

F

requency

rate and severity rates; cause-wise analysis; basic causes of accident occurrence; investigations into accidents and accident reports

TRAP

,Workers

participation in safety management; ISO and safety audit; safety conferences; tripartite and bipartite committees

MINE GASES AND THEIR PHYSIOLOGICAL EFFECTS

FIRST AID AND AMBULANCE WORK

NOTIFIED DISEASESlide3

MINING: A HAZARDOUS PROFESSION

It

is accepted that mining is a hazardous profession. Just like in any other industrial accident

, unsafe

act and unsafe conditions of work lead to accidents in mines.

Most of the accidents

are preventable

- they do not just happen, they are caused

. Other than loss of lives or

serious injuries due to mining accidents, the aspect of occupational health hazards in mining industry is

critical and going to assume serious proportion with the increasing awareness. Hence it

is pertinent

to review the safety and occupational health status of the mining industry of

this country

to work out a road map for its effective mitigation.Slide4

Incident

can refer to any event – big or small, good or bad, intentional or unintentional. A bank robbery, a funny or controversial situation, an argument between celebrities, etc. – all can be described as incidents.

An

accident

is a bad event caused by error or by chance. Accidents are always unintentional, and they usually result in some damage or injury. A car crash is one example of an accident. If some equipment malfunctions in a factory and injures the workers, that is also an accident. Examples of very minor accidents are when you step on someone’s foot or spill your coffee on someone else. You didn’t want or plan to do it

.

All accidents can ALSO be described as incidents – but NOT all incidents are accidents.Slide5

Important causes of accidents

Roof/side fall -

accidental fall of roof or side at the

time of excavation.

Winding -

accident in the course of raising or lowering

coal or man in shaft

Haulage

- accident in the course of raising or lowering

coal by tubs.Dumper - accidents associated with dumper – wheeled vehicles for carrying coal with tipper mechanismConveyer - accident in the use of belt or chainconveyersOther transport machinery - accident associated with trucks and wagonsOther machinery accident - associated with non-transport machinery like loading machinery, crusher etc.Slide6

Cont…

Explosives -

accident in the course of using explosives

Electricity

- accidents resulting out of the use of

electricity

Dust/gas

- accidents due to explosions of noxious

gases, due to absence of oxygen, due to

explosion of coal dust etc.Fall of object/person - accidents occurring due to sudden fall of an object or a personInundation - accidents due to sudden rushing in of waterMiscellaneous - other causes of accidents

Mohammed Imran A.Slide7

Paul Committee Report

Guidelines for drawing up support plans in

bord

and pillar workings in coal mines.

The bolting density for the three types of roof, where bolting has been recommended, will be as given below:

(i) Poor: 1.2 to 1.5 bolts/

sq.m

.

(ii) Fair: 1.0 bolt/

sq.m.(iii) Good: 0.7 bolt/sq;m.Slide8

Question

During taking bore hole sample following dimension of core pieces were recovered- 15 cm , 9 cm, 10 cm ,11cm 5 cm . What is the RQD of the rock sample?

A. 72.2

B. 49.2

C. 100

D. 40Slide9

Question

What is the rock mass quality of the rock?

A. poor

B. Very poor

C. Good

FairSlide10

Question

Point load index of a rock is 15 . What will be the compressive strength of that rock ?

A. 360 kg/cm2

B. 150

kg/cm2

C. 225

kg/cm2

D.

215

kg/cm2Slide11

C

o

 (compressive strength )= 24 x Is (in kg/cm

2

)Slide12

RQD=

sum

of the length of all core pieces 10 cm or more

x 100

the

total core length

RQD

Rock Mass Quality

<25%Very Poor25-50%Poor

50-75%

Fair

75-90%

Good

90-100%

Very good

RQD classification indexSlide13

It is often stated that safety status of a particular mine is not up to the mark. What exactly it means? Till recently we have been comparing safety status of mines using accident rates per thousand persons employed or accident rates per million

tonnes

of output. It is also called

frequency rate

.

Frequency Rate =

Number of Persons Involved In Accidentx1000

(Employment Basis) Persons Employed in Mine

Frequency Rate =

Number of Persons Involved In Accidentx100000(Production Basis) Coal Production Slide14

What is the frequency rate of accident of a mine employing 500 persons and there was 2 fatal,3 reportable and 5 minor injury was reported in a year ?

A. 100

B. 20

C. 10

D. 5 Slide15

The safety standard of a mine can also be evaluated using

severity rates

. The severity of accidents is evaluated by time lost due to resulting injury. To calculate the severity rate, it is necessary to calculate actual man-days lost in case of reportable and minor injuries and add the specific time charges taken from the standard tables in respect of fatal and serious bodily injuries given in Workmen’s Compensation Act. This requires compilation of all reportable and minor injuries and time loss due such injuries. Unfortunately these figures are not readily available and hence DGMS has given an empirical formula for calculating severity index of a mine. This is as follows:Slide16

SAFETY IN MINES

SEVERITY INDEX- It is an index to determine whether a mine is accident prone or not.

Severity Index =

50F+S x 1,00,000

Man shift Worked

Where, F=

F

atal accident in a year

S= Serious InjuriesIf the severity index of a mine is more than 12 then that mine is treated as Accident Prone MineSlide17

What is the severity index of the mine where there were 2 fatal and 8 serious bodily injury case reported? Is the mine may be treated as Accident Prone

mine?Total

manshift

worked of mine is 4,00,000 ?

A. 13 , yes

B. 8 , No

C.27 , Yes

D. 27, NoSlide18

(Cir. 9/1974)

In

respect of the fatalities, the standard number of

man days

lost is 6000

.

Man Days Lost - Total working days lost to-date or within a

period

(usually one year) due to reasons such as accidents, lockouts, or strikes. This figure is computed by multiplying the number of days with the number of affected employees.

Slide19

How can we calculate Equivalent Man Days loss

Equivalent Man Days Lost =

Percentage of loss of earning capacity x6000

100

For example:

A person while unloading the tub got his thumb cut which led to 60% loss of his earning capacity . In this case what will be the equivalent man-days lost ?

Equivalent Man Days Lost =

Percentage of loss of earning capacity x6000

100

= 60x6000 = 3600 100Slide20

Question

A man sleeping in his house ,which is outside the boundary of the mine is hit by the fly rock due to blasting. In relation to this , accident will be termed as ?

A.Mining

Accident

B. Mining Statistical

C.

Mining

Non Statistical

D. Non Mining Accident Slide21

Criteria to determine accidents- Mining statistical, Mining non-statistical, Non-mining

Mining

Statistical Accident

A accident shall be termed as Mining statistical if :

That occurred within the boundary of mine and person(s) involved in the accident is employed in mine and accident occurred due to any mining operation or any machinery/equipment/apparatus deployed therein or due to negligence or willful actions by person employed in mine , that has endangered his life or life of other persons or negligently or willfully omit to do anything, necessary for safety of person employed therein, and/or

That

occurred within the boundary of mine and person(s), employed in mine has/have gone in any part of mine other than that part in which he/they work and involved in accident due to any mining operation or any machinery/equipment/apparatus deployed therein or due to negligence or willful actions by person employed in mine , that has endangered his life or life of other persons or negligently or willfully omit to do anything, necessary for safety of person employed therein

.Slide22

Mining Non-Statistical Accident

Person(s

) not employed in mine is/are involved in accident occurred within the boundary of mine due to any mining operation or any machinery/equipment/apparatus deployed therein or due to negligence or willful actions by person employed in mine , that has endangered his life or life of other persons or negligently or willfully omit to do anything, necessary for safety of person employed therein, and/or

Any operation occurred due to any operation which is incidental to mining operation, in an area outside the boundary of mine whether the person(s) involved in accident is/are employed in mine or not. Slide23

Non- Mining Accident

A

accident shall be termed as Non- Mining Accident if it occurs outside the boundary of mine, whether person involved in accident is/are employed in mine or not due to any operation which is not incidental to mining

operation.The

consumer truck, transporting mineral involved in an accident outside the boundary of mine shall not be treated as an operation which is incidental to mining operation.

Any death due to natural cause shall also be termed as Non-mining accidentSlide24

Question

A mechanical fitter employed in mine is hit by a transporting truck outside the boundary of the mine. In relation to this accident

will be termed as ?

A.Mining

Accident

B. Mining Statistical

C. Mining Non Statistical

D. Non Mining Accident Slide25

Notified Disease

Notified Diseases are –

1.Pneumoconiosis

2

.

Silicosis

3. Asbestosis

4

. Cancer of lung or the stomach or the pleura and

peritoneum(i.e. Mesotheliomas)5. Manganese Poisoning ( Nervous Type)6. Noise induced hearing loss7. Contact Dermatites caused by direct contact with chemicals8. pathological manifestation due to radium or radio-active susbstances. Slide26

CMR 10

Where any person employed in a mine contacts any disease notified by the Central Govt. in the Official Gazette, the owner, agent or manager shall, within three days of his being informed of the disease, give notice thereof in Form V to the DM, the Coal Mines Labor Welfare Commissioner, the CI and the RI and the Inspector of Mines(Medical

). Slide27

Question

Notice of notified disease is to be given in _______________.

Form IV A

Form V

Form III

Form VISlide28

Question

A person during loading operation got his

finger cut off.

He returned to work within 52 hours after

medical treatment.

This injury caused to him will be treated as___________

Reportable injury

Serious injury

Minor injury

Reportable or minor injury Slide29

Question

Inspector shall make an enquiry to an accident involving loss of life within______________ of the receipt of notice.

15 days

Two months

72 hours

14 daysSlide30

Mines Act 23 (2)

Where a notice given under 9(1) related to an accident causing loss of life , the authority shall make an inquiry into the occurrence

within two months

of the receipt of the notice.Slide31

Question

Work may be resumed at the place of accident if inspector fails to inspect the place of accident within_____________ of the time of accident.

24 hours

72 hours

48 hours

15 daysSlide32

Whenever there occurs in or about a mine an accident causing loss of life or serious bodily injury to any person the place of accident shall not be disturbed or altered before arrival or without the consent of the CI or Inspector whom notice of the accident is required to be given under sub-section (1) unless such disturbance or alteration is necessary to prevent any further accident , to remove bodies of deceased, or to rescue any person from danger:

work may be resumed at the place of the accident if CI or the said inspector fails to inspect the place of accident within 72 hours of the time of accident,.Slide33

As per DGMS Cir Leg 4/1976 , intimation of reportable injury involving ______ or more persons

are to be reported immediately to the CI and RI in the same manner as for fatal or serious accident

.

A. 4

B. 5

C. 9

D. 10Slide34

( Cir. Legis. 4/1976)

Intimation of even minor (reportable) accidents involving 5 or more persons are to be reported immediately to the CI and RI in the same manner as for fatal or serious accident. Slide35

Forms for Accident Notice

Form

IV-A – Notice about the occurrence of accident in mine

Form IV-B-In

respect of very person killed or injured the owner, agent or manager shall within

7

days of the

occurence

, send the CI

particulars.(cir. Legis. 2/1993) Form IV-C Notice should be sent within 15 days of the injured returning to duty.