Vt Report Ashish

8/3/2019 Vt Report Ashish

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BIT SINDRI

PRACTICAL TRAINING REPORT

PATHERDIH COLLIERY (B.C.C.L.)

DURATION OF TRAINING (07/06/2010- 15/07/2010)

PREPARED BY

NAME: ASHISH ANCHAL

ROLL NO.-080836

BRANCH: MINING ENGINEERING


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ACKNOWLEDGEMENT

I am greatly indebted to Dr. U. K. Dey (H. O. D. Mining Engg.)

who encouraged me to take practical training at Patherdih Colliery

(BCCL) in Patherdih. He give me precise knowledge about Mining

methods which I found very useful in my training period in Coal Mines.

I am also very grateful to Mr.A.K.Sinha(Colliery Manager),

Mr. A. K. Jha (Project officer) & Mr. B.K.Sinha(ACM) for their

co-operation and suggestion during training period.

Lastly I acknowledge my indebtedness to all

colliery employees to whom & was in touch during the training

period.

CONTENTS PAGE NO


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(i) ACKNOWLEDGEMENT 1

(ii) INTRODUCTION 2

(iii) GEOLOGY 6

(iv) ACCESS AND PROGRESS 7

(v) DEPILLARING 8

(vi) DRILLING AND BLASTING 8

(vii) HAULAGE DETAILS 11

(viii) TIME STUDY 12

(ix) SUPPORT 13

(x) LAMP HOUSE DETAILS 14

(xi) VENTILATION 15

(xii) PRODUCTION 16

(xiii) UNDERGROUND MACHINERY 17

(xiv) SURFACE TRANSFORMER 18

(xv) WATER POSITION 19

(xvi) FIRE POSITION 19

(xvii) CYCLE OF OPERATION 20

(xviii) MAN POWER 20

(xix) CONCLUSION 21

INTRODUCTION


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LOCATION:Patherdih Colliery is situated in the eastern margin of Jharia coalfield.

Patherdih railway station on Dhanbad Patherdih section of eastern

railway is just adjacent to the colliery office.

Patherdih covers an area of 244.34 hectare. It is 16 km away from

Dhanbad and 275 km from Kolkata. It is situated between longitude 86

17 17 E and 86 24 54E and latitude 23 4010 N and 23 4042 N.

BOUNDARY:North : - Patherdih Bazar railway station

South : - Sudamdih shaft and washery

East :- Chasnalla Colliery

West :- Chandan O/C project , Bhowrah

ACCESSIBILITY:


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It is accessible by road as Dhanbad Sindri Road passes through

very near to the office. It is also accessible by Railway through

Patherdih bazaar railway station.

MANGEMENT:The Management of this colliery is very promising and efficient .

They take good care of workers and other employees. Moreover

there is good relationship between them.

The management runs as follows:-

Owner : B.C.C.L.

Head office: Koyla Nagar (Dhanbad)

Personal Department

Mining Department

Supervisory Department

Patherdih colliery was planned to produce 1.5 lakh tons of coal per

annum .There are presently one working unit at Patherdih Colliery.

(i) VI seam Incline - Depillaring

Again it is proposed to reopen an additional 7 seam incline. As the coal

produced of same grade i.e. H.H. grade, it is transported to speed

functions.

POWER:


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Electricity is the source of power . It is purchased from Jharkhand

State Electricity Board which purchases from DVC shift hours.

SHIFT HOURS:1st shift - 8 AM to 4 PM

2nd Shift - 4 PM to 12 AM

3rd Shift - 12 AM to 8 AM

GEOLOGY:

The Jharia Coalfield is most productive and important of the Indian

Coalfields . The field is roughly sickle shaped . The larger area being

38 km . NW to SE and the shorter being 19 km . EW to NS.

The Patherdih Colliery lies on the dip side of the Bhulan

Bararee thrust. Due to thrust the gradient of the seams are about

S14W. There is no major geological distribution in any of the seam

presently being worked. One dyke is in the western part of the property

ranging in thickness from 30 cm to 1 m., which runs in the SW at an angle

of S26W. The dyke has been crossed in all seams to continue development

beyond dyke; however no inflammable gas has been detected.

In Patherdih Colliery, there seams VI,VII and VIIIA seam is

shale. All the seams are highly inclined.


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ACCESS AND PROGRESS:

As the seam is outer cropping in the southern part of the property ,it is

approached by an incline.

An incline is the stopping roadway driven from the surface to the seam

through the alluvium and thus overlying seam.The main haulage of VI

seam is driven in apparent dip having gradient 1 in 1.8.

In addition to haulage roadway ,travelling roadway is also driven just by the

side of old machine. This roadway is equipped with ventilating fan also.

DEPILLARING:The method of working is Board and Pillar with Hydraulic stowing.At

present the depillaring operation is carried in the Panel P2 of VI seam

whereas Panel P1 has already been depillared and stowed.The mine is

developed up to 21thlevel and proposed to be extended beyond it.

Size of gallery = 4.2 m * 3m

Pillar size = 27m * 18.75m

But at some places it is 24m * 18.5m and 26m * 18.75m.

Average depth of seam =120m

DRILLING AND BLASTING:Drilling :- Thesystem of breaking coal is solid blasting .

The holes are drilled with the help of drill machine.

Type - Huwood

MakerHuwood and Co.

Volts -125 V

H.P. 1.5


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R.P.M. of Motor- 2800

R.P.M. of rod - 728

The drill rods are made of mild steel . This type of drill bit for coal is

eccentric drill bits are tungsten carbide tipped.The bits are detachable.

Length of drill cable = 300 ft.

About 15 to 18 holes are drilled in the specific duration .The pattern of hole

is wedge cut.

BLASTING:Explosive used:-

(i) Powergel (P5),32 mm dia.200 gm , M/s IEL limited Gomia ,maximum

1000 gm.

Production per shift = 40 tonnes.

STEMMING MATERIALThe stemming material used is the mixture of sand and clay in the ratio 3:1.

EXPLODERSType : Multi shot exploder.

Capacity: maximum 25

Battery: P-276 everyday batteries

Firing current: 1.5 Amp.

Limiting resistance:8

Discharging current duration: 3.4 milli second

TYPE OF SHOT FIRING CABLE:


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It is two cores PVC cable each core contains a conductor of fine wires of

0.002 dia.

Length of cable = 30 m.

HAULAGE DETAILS:For main haulage:-

(i) Squirrel cage motor of 100 HP and voltage of 550V.

Three gears are used for operation and it is liquid controlled.

Rope dia = 22mm

Time taken from tugger haulage to surface = 5 minute

TUGGER HAULAGE DETAILS:It is direct rope haulage having following specifications:-

Motor power -40 H.P.(induction motor flame proof)

Current - 52 amp.

RPM -1480

Type -BF

KW/HP - 37/50

Rope - single stranded

Type -617 FMC

Size -19 mm.

Maximum no. of tubs to be attached =5 (when loaded)

=5(when unloaded)


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TIME STUDY:Time taken in drilling one hole of 1.5 m =60 sec.

Time taken on priming one cartridge =5 sec.

Time taken in charging hole =15 sec.

Time taken in stemming the hole =1 min.

Time taken in operating the exploder=1 min.

Time taken in disconnecting the cable= 6sec.

Time taken in loading one tub of coal =5 min.

Capacity of tub =1.2 tonne

20-30 baskets are needed to load a tub having capacity of one ton.

SUPPORTS:At faces : Timber Props

In rise and haulage galleryprops and cross-bars.At some placesrectangular steel cogs are also used.

Time taken in erecting one cog= 1 hr.

MAGAZINE:No. of detonators =10000 (license and capcity)

Explosive used =99 kg.

Lifted explosive =6 months from the date of manufacture.

Daily consumption = 150 kg.

SAFETY PRECAUTION:


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(i) Torch cap lamp electricity can not reach inside the house.

(ii) Use of generators in the magazine.

LAMP HOUSE DETAILS:Lamp capacity : 600

Safety lamp : 10

Charge capacity:8

No. of self rescue : 300

Charging voltage required : 4.8 V

Life of cap lamp : 18 months

Check time internal of self rescue : 3 months

Input voltage of the charger : 440 V

Output voltage : 4.8V D.C.

Time taken to full charging : 10 hrs.

Discharging time : 8 hrs.

PUMPING:There are two pumps having capacities 180 H.P. & 90 H.P. It is situated at

16th & 18th level respectively. 180 H.P. capacity pump is used for sand

stowing purposes as well as for filter house.

VENTILATION:To fulfill the requirement of Regulation 130 of CMR 1957, a main

mechanical fan is installed near traveling roadway.

SPECIFICATION OF FAN:


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Name : Axial flow fan

Model no. : PV -200 (VOLTAS)

Capacity : 5100m3/min.

W.G.: 22 mm of Hg.

Driving motor : 110 KW,440 volt, 1480 rpm

No. of blades : 10

No. of driving belt for power transmission =9

Blade angle: 220 30

PRODUCTION:As on dated: 15-07-2010

Seam No. : VI Seam

Production(tone/day): 120

Daily O.M.S. : 0.9 tonne

DIRECT HAULAGE:100 H.P., 550V ,1440 rpm .

Rope dia.= 22 mm

Rope length = 750 m.

5 tub hauling and 6 tub loading.

Stranded rope: FOS.- 7.212

UNDERGROUND MACHINERY:


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VI SEAM:

(i) 180 HP pump M&P make 500GPM,210m Head,440V,1440 rpm ,No.-2

(ii) 90HP pump M&P make 500GPM,210m Head,440V,1440 rpm ,No.-2

(ii) Drill machine-15 head 125 V, J.V.Make, nos. used-3

SURFACE TRANSFORMER:(1) 500 KVA, 6.6 KV/440 V 2

(2) 300 KVA, 6.6KV/550 V 1

(3) 500KVA/550 V/440 V 1

(4) 200KVA, 6.6KV/440V 1

WORKING SEAM:

Presently working seam is VIth seam. Here depillaring is started in panel

P2. Depillaring work of panel P1 has been completed already. The

immediate roof is of Shale, Sand Stone. Overlying seam of VIth seam is

VIIth seam which is opened recently for extraction.

Gassiness of VIth seam is of degree I mine.

FIRE POSITION:

IX/X and XIV seams:-Fire exist at outcrop side, protective work are being

done, area blanketed with sand stone and earth, fire is under control.

VI-SEAM:


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Thickness - 3.64-4.8m.

Gradient 1 in 1.8S14W

Gassiness Degree I

CYCLE OF OPERATION:

Drilling Charging and Steaming Blasting Dressing Supporting

Loading Transportation Unloading

MAN POWER:

Designation man in one shift

(i) Overman 1

(ii) Mining sardar 1

(i) Shot firer + dresser 1+1

(ii) Trammer 5 (u/g)

(iii) Trammer 3 (surface)

(iv) Driller+ helper 1+2

(v) Haulage operator 1+1

(vi) Line Mistry 2

(vii) Loaders 20

(viii) Electrician + helper 1+2

(ix) Timber Mistry 1+2

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CONCLUSION

At last I want to conclude my training report and I thanks once again to

all the officials and staffs of My College,Patherdih Colliery and B.C.C.L

from depth of my heart for providing me immense support to complete

my training report.I am also thankful to my friends you were always

present to extend their support during the completion of my project.This

training period was really a memoriable experience for me as this was my

first visit to any underground mines in my life and I thoroughly enjoyed

the experience as I got lots of things to learn as Mining is incomplete

without practicals.

Vt Report Ashish

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