Tipong report

2014

TIPONG UNDERGROUND COLLIERY

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REPORT ON TRAINING TIPONG COLLIERY

NORTH EASTERN COALFIELDS,

COAL INDIA LIMITED,

MARGHERITA, ASSAM

SUBMITTED BY

SANJAY KUMAR B-TECH MINING ENGINEERING

Department of Mining Engineering

National Institute of Technology

Rourkela-769008

2014-2015

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TABLE OF CONTENTS. NO DESCRIPTION PAGE NO.

1 INTRODUCTION 3

2 MINE LOCATION 3

3 MINE HISTORY 3

4 CLIMATE, FLORA & FAUNA 3

5 TOPOGRAPHY & DRAINAGE 4

6 COAL CHARACTERSTICS 4

7 GEOLOGY OF THE MINE 5

8 MINE FACILITIES 6

9 MAN POWER REQUIREMENT 7

10 DEVELOPMENT OF MINE 7

11 METHODS OF MINING 9

12 VENTILATION 12

13 MINE SUPPORT 13

14 GAS DETECTION 14

15 DRILLING AND BLASTING 16

16 TRANSPORTATION FACILITIES 16

17 POWER SUPPLY 17

18 MINE PUMP 17

19 COMMUNICATION 20

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1. INTRODUCTION 2. Date of establishment : 1924 A.D3. Owner at the time of establishment : M/S, A.R.T co. Ltd.4. Name of the coalfield : Makum5. Extent of the mine along the strike : 6km

2. MINE LOCATION

Mine Lies between 270 16’ 54’’ N and 270 18’14’’ N and 950 49’ 40’’ E and 950 53’ 00’’E falling in the Survey of India Top sheet No. 83 M/15

Altitude is 175.01m above MSL

3. MINE HISTORY

o Tipong mine was started in 1924. The two Adits of the 14 th level mine were started in 1947 at the height of 212 m above the ground level. This mine was exhausted in 1965.

o The 10th level was started in 1952 and lasted till 1980.o In order to extract coal lying between ground level and the 10 th level, the Pragati

Khani Adit was started in 1961 and constituted one of the four mines of Tipong Colliery.

o The Agragati Khani and Prativa Khani incline has been discontinued since recent past.

o Both of the two major coal seams viz 60’ seam and 20’ seam have been worked by Bhaska and Tipong method from the surface down to local drainage (Tipong River) level (also called zero level by NEC).

o These seams have been depillared in some part of the property. The 60’ seam has been worked in 2 section viz Top and Bottom sections.

o ‘Descending Shield’ method and ‘Flexible Roofing’ method of mining have been successfully introduced in Tipong colliery with the help of erstwhile USSR.

o The mines are of degree III gassiness.o The geo-mining condition in the mines is very difficult due to the steep dip of the

seams, generally ranging from about 40 in the western part to as high as 75 in the eastern part.

o The area is devoid of any open cast mines excepting a small old abandoned quarry in Tipong east near Tipong River.

o While ‘5ft seam’ has been worked by underground method in a very small patch in the Tipong East area only the other two seams viz. New ‘7ft’ and ‘8ft’ seams have not been worked due to their inconsistent nature.

4. CLIMATE, FLORA & FAUNA

o Humid but short summer, a prolonged rainy season and a fairy cool winter.o Max. Temp. 360C, min. 60C.o Annual Precipitation:- 200 to 300 cmo Relative Humidity:- 87 to 91%o Practically 8-9 month rains.o Three tier luxuriant growth of vegetation and categorized as ‘Evergreen Tropical

Forest’o Vegetation belong to first order canopy comprises very tall trees with broad leaves

like Halang, Halak, Nahar, Champa, Amari etc.o Second order canopy like Bamboos and canes.o Third order canopy evergreen shrubs like twiners, long grasses etc.

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o Area free from wild animals, but presence of deer, panthers and reptiles has been reported. Leeches are seen in large numbers.

5. TOPOGRAPHY & DRAINAGE

o Thick rugged terrain with elevation ranging from 175 to 500 m above sea level.o The Tipong River, originating from the hills located south of the area, flows in

northwesterly direction cutting across the ridge down to the elevations of 170 m above MSL.

o Tipong River flows though the centre of the block. o Lekhapani River flows outside the block boundary in the west.

6. COAL CHARACTERSTICS

S.N. Properties 60’ seam 20’ seam

Top Full seam

1. M% 1.6-4.0 1.8-2.6 1.4-5.82. Ash% 3.5 -13.2% 6.3-19.8 4.7-16.2

3. VM% 39.8-44.7% 36.7-43.2 36.8-46.9

4. Total Sulphur 2.3-3.9% 2.795. Caking Index 17-22 14 & 206. Calorific Value 6480-7620 7960-82407. Coke type F & G1 F8. C % 72.0 66.8-70.79. Hydrogen 5.2 4.9-5.7

10. Fixed C 80.3-82.3 81.20 78.1-80.011. H% 5.6-6.5 6.3 5.3-6.312. N% 0.9-1.8 1.2-1.3 4.3-5.413. S% 1.4-3.7 2.2-2.5 1.2-5.4

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14. O% 7.2-10.2 8.8 8.5-9.9

7. GEOLOGY OF THE MINE

REGIONAL GEOLOGY

o Makum Coalfield lies between 270 5' N and 270 05' N and longitude 950 40’ E and 960

05’ E. o Covered by Survey of India toposheet no. 83M/15.o Active mining has been going on over the last several decades since first colliery

started at Ledo in 1882.o The working are located in Namdang, Baragolai and Ledo in Northern limb of

“Namdang Syncline” and Tipong east and Tipong West area in the southern limb.o The coalfield represents a NW-SW trending asymmetrical syncline bounded by

Margherita trust in the north and Haflong-Disang trust in the south.

ROCK FORMATION

Tikak Parbat formation is the main coal bearing formation and comprises medium to fine grained sandstones, siltstones, sandy shale, shales, mudstones, clays, carbonaceous shale and coal horizons. The coal horizons are, however, restricted within 200 m basal part of the Formation. The base of the thickest seam referred to as 60ft seam is demarcating horizon between the Tikak Parbat formation and underlying Baragolai formation.

60ft and 20ft seams are the two major seams and both have been exploited extensively by U/G mines.

GEOLOGY OF THE MINE

Seams(from Top to

Bottom)

Parting from the

Top seam (m)

Gradient(Degrees)

Thickness (m)

Present status

10ft Seam 70-73 1.55 Fairly consistent and is extensively worked

8ft Seam 25 70-73 2.3 Not consistent and has been worked in patches

20ft Seam 4.25 70-73 6 Varying in thickness

5ft Seam 21 70-73 2.35

60ft SeamT/C

3.2 70-73 1.6 Generally occurs in three distinct layers with a thick parting varying between 3 to 18 meters called Top Seam and Bottom Seam.

60ft SeamM/C

0.5 70-73 5.65

60ft SeamB/C

4.25 70-73 8.25

The other two seams i.e. 7ft. seam and 5 ft. seam have not been worked due to their limited occurrence and inconsistent nature.

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GEO-MINING CONDITIONS AT TIPONG COLLIERY

o Roof(Hangwall stone) and Floor(Footwall stone):o Roof (Hangwall stone) : The roof consists of mud stone or argillaceous shale.o Floor (Footwall stone) : The floor consists of mud stone and argillaceous shale,

fairly weak, and prone to moisture softening and swelling.o Roof is very weak and easily cavable.o The compressive strength of the immediate floor varies from 175 to 400 kg per sq. cm,

value of RMR 43.9, category of roof- fair class III, Rock load 3.4t/sqm.o Rock mass is heaving in nature.o In seam parting varies within wide limits and inconsistent in nature.

COAL RESERVE

1. coal reserve for opencast mine : 19.03 MT2. coal reserve for underground mining : 50.44 MT

TOTAL : 69.47 MT

8. MINE FACILITIES

WORKSHOP

For maintenance and repair of equipment deployed in Tipong U/G two workshops are functional:

a. Daily maintenance, scheduled maintenance, minor repair and medium repair proposed to be carried out in project workshop.

b. Capital repair and major overhauling of equipment at Central Workshop/Regional Workshop.

Proposed:- A maintenance workshop of adequate dimension will be constructed at surface for U/G equipments.

PROJECT STORE

The project store is functional for reception, storage, and issue of all kinds of materials, equipment and consumables required for mine operation and maintenance of mining, mechanical and electrical equipment. The storage capacity is planned for 30 to 45 days consumption of materials.

HOSPITAL FACILITIES

A hospital of 20 beds is provided near Tipong colliery. Qualified doctors and other staffs are working in the hospital of Tipong colliery. Hospital has got one ambulance for meeting emergency situations.

CANTEEN FACILITY

A canteen has been set up in the mine premises to meet the daily requirements of the employees. Timely arrangement of meals is done by the canteen employees.

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LAMP CABIN

A lamp cabin with adequate storage and charging facilities has been established in the mine and maintained as per statutory rules. The room is adequately staffed. The lamps are regularly charged for the use in the upcoming shift.

VOCATIONAL TRAINING CENTRE

A Vocational Training Centre setup to provide technical and safety related training and socially concerned awareness classes are carryout in the VTC. Periodically refresher trainings are carried out for the already employed workers.

9. MAN POWER REQUIREMENT

Category Male Female Total

Executive 18 - 18

Monthly Rated 121 7 128

Daily Rated 353 18 371

Piece Rated 35 - 35

Total 527 25 552

10. DEVELOPMENT OF MINE

ACCESS TO THE MINE

ENTRIES NAME/ NO.

SIZE(CROSSSECTION)

GRADIENT(1 IN…/VERTICAL)

LENGTH PURPOSE (VENTILATION, COAL, MATERIAL AND MEN TRANSPORT, ETC.)

Pragati Khani 8 m² 1 in 90 2.1 km Ventilation,Men traveling, Material and waste transportation

Main Dip 10 m² 1 in 4 438m Mine Intake,Material, Coal andwaste transportation,Conduit for pipelines

Companion Dip 8m² 1 in 4 438m Mine intake, men traveling and conduit for pipelines.

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MULTI HORIZON DEVELOPMENT AND MULTISECTION DEVELOPMENT

At present coal between 0L and -7L are extracted through -7L horizon. Two inclines are being driven at inclination 1 in 3 to extract coal between -7L and -14L through -14L horizon. In future, to exploit coal reserve between -14 L and -21L, Dhalai drift has to be extended for ( 1158 m ) to reach at -21L (R.L.= -135.05)

History of Dhalai Drift:-

1. Started in 10.06.1984

2. Drivage completed 885m

3. Present status Discontinued since 02.07.94.

4. Balance 1056 m

5. Proposed 1) Recovery 8

2).Mechanized drivage to reach to -21 L.

PRESENT WORKINGS

Property on eastern and western side of Tipong pani river has been extracted above drainage level in Agragati Khani and Pragati Khani respectively. On the eastern side of river, Agragati Khani (Coal dip) working were confined between (-) 1L ( RL= 163.64 m) and (-) 5L (RL= 103.10 m). The middle section of 60 feet seam thinned out and became inconsistent beyond 7th cross measure of (-) 5L and presently working is not carried out in Agragati Khani.

On the western side of the river, Udit Khani (Dip mine) workings are confined between 0L (RL= 189.63 m) and (-) 7L (RL= 78.70 m) in bottom section of 60ft seam. At present no working has been commenced in top section of 60ft seam and 20ft seam. Present mine working extends to a distance of 2100 m from the Incline Bottom.

Presently, 2 F/W drivages, i.e. 0L and -7L by drilling and blasting and 3 galleries in coal at

-7L,-5L and -3L by pick mining is being done. All operations are manual in nature.

NEW-DIP WORKING

To extract coal between -7L and -14L, New dip development is in progress to reach -14L horizon. For this purpose, two dip drivages of gradient 1 in 3 from -7L, one for haulage road in bottom coal and other in top coal for traveling purpose are being developed manually with interconnections and has reached -12L horizon (RL= 13.77 m).

UNDERGROUND DEVELOPMENT

1. IN STONE : Footwall drivages through the rock are being driven from brake/incline bottom in an advancing way parallel to the strike of the coal. Footwall serves as the transport road and intake airway. The intake air travels through raises in the workings driven in coal seams which have an opening at the upper ventilation level.

Mode: Drilling and Blasting, loading is manual.

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2. IN COAL : The development is carried out by manual pick mining which is being continued along the strike length and is proposed up to a distance of 2.7 km from the incline bottom.

11. METHODS OF MINING

Chronological sequence of different methods of mining practiced in Tipong Colliery is given in the following chart.

Methods Mine Seams Date of Start

Date of finish

Extracted reserve approx (Tes)

Bhaska Method & Manual Quarry

+22L, +14L,+10L entries

60 feet20feet

1924 1977 37,11,879

Tipong Method.

Pragati Khani

60 feet20feet

1977 1986 19,22,484

Descending Shield Method.

Pragati Khani

Bottom section of60 feet seam and20feet seam.

26.5.1986 10.7.1990

10,10,469Flexible Roofing Method.

Pragati Khani

Top section of 60 feet seam

1.3.1985 31.10.89

Tipong Method of Mining.

Agragati Khani & Udit Khani

60 feet20feet

1989 07.11.2008 17,13,117

Restriction imposed by DGMS

Udit Khani

60 feet seam 07.11.2008 06.10.2010 Nil

Permission given for Development in two F/W faces and development in coal is restricted to 5 nos. of galleries till method of extraction is finalized.

Udit Khani

60 feet seam 07.10.2010 Till date 8162

TOTAL = 83,66,111Te

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DEPILLARING

The depillaring operation consists of the following steps:

a. Funnel makingb. Slot cuttingc. Ring hole blasting

FUNNEL MAKING

Funnel is made between upper sub level i.e. 2nd sub level and lower sub- level i.e. Ist sub

Sub-level between two adjacent levels 1.2m x 1.2m short cross measure (X-M) are developed towards roof leaving 0.3 to .6m coal below the roof and exposing the seam floor at 2nd sub level. From the XM dip holes are blasted for making funnel. Just below the neck of the funnel two pairs or props are set at 1m to 1.2m interval. These props are called “safety props “which prevents the goaf rock from gravitating down the raise when roof rock caves in after coal extraction. Funnel is extracted 1.2m x 1.5m in bye of the raise under extraction, 4.5m out bye and 0.3m – 0.6m below the roof with exposed floor. This funnel serves as bunker and guides the blasted coal to the raise for subsequent gravity flow.

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SLOT CUTTING

After completing the funnel, holes are drilled for first in – bye ring, slot is started from the X-M already developed during funnel making operation at ring level just above the 2nd sub level. It is made between 2nd sub level and Ist sub level above the ring level from where ring holes are drilled & blasted. Width of the slot is extended from floor to 0.3m to 0.6m below the roof. The slot is made by dip and rise holes drilled and blasted from the XM. This operation provided free face to the ring hole blasting from the ring level.

RING HOLE BLASTING

Before the slot is started, the ring holes are drilled in the in-bye pillar with a burden of 1.2m to 1.5m and then the slot is completed. All the holes in the ring are blasted simultaneously. Rings are designed according to the seam thickness, gradient and interval between level and sub-levels. Charges per hole and length of holes are predetermined. Ring holes are drilled in the out-bye pillar also and blasted till 4.5m pillar is left against the next raise.

These operations are repeated in the subsequent raises and line of extraction is keptdiagonal. When seam thickness exceeds 6m, one more set of levels and sub levels are developed in the hang wall side with the help of short X-M. Funnel and slots are connected and two rings are drilled and blasted simultaneously or hang wall side ring is blasted first. Blasted coal gravities down the raise to the nearest conveyor and finally to main loading chutes.

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WAX-WALL

PROPOSED METHOD

1. Borehole raise boring method

12. VENTILATION

o One fan of capacity 2000 m3 per min. has been installed at 0L entrance of Pragati Khani which serves as main mechanical ventilator of the mine.

o One standby fan of equivalent capacity is also installed at bypass of 0L entrance of Pragati Khani.

o As the mine is of degree III gassiness, peripheral type of ventilation system is followed.

o Auxiliary fans are of 200m3/min capacity is installed in U/G at 0L, -7L and New Dip to ventilate the primary headings.

Proposed

1. Installation of adequate capacity M.M.V. after proper studies to comply with adequacy of statute.

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2. Sub-level faces will be ventilated by exhaust/forcing/push pull auxiliary system of ventilation through 1.0 m of ducts.

3. Adequate capacity of Auxiliary Fans will be provided.

Ventilation is the most important part in every underground mine to provide adequate ventilation. For adequate ventilation in U/G mine . DGMS approved some more steps :

1. Main mechanical ventilator : (main fan) make and type of fan = Vellow/axial.a) Fan capacity : 2000 m3/min.b) Efficiency : 52.5%c) Fan discharge : 1200m3/mind) Water gauge : 58/60 mme) Diameter : 1.23 mf) R.P.M : 1460g) K.W : 27h) Volts : 550V i) Amp : 32j) PF : 85

2. Stopping3. Door4. Air crossing 5. Auxilliary fan6. Regulator7. Pressure survey8. Ventilation survey9. Brattice cloth used

13. MINE SUPPORT

1. Timber for development faces and split galleries.2. I-section, hollow section and side wall for development roadway.3. V-section arch girder and bride arching for week patches which serve a better form of

supports.

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4. Four member of roof convergence meters has been procured and is on the verge of installation.

5. Systematic supports rules framed by manager are judiciously followed.6. Steel square chokes.

SYSTEMATIC SUPPORTS RULES (S.S.R)

This S.S.R shall apply to all development working in 60ft, 20ft,and other seam including stone diverges of Tipong colliery.

1. All galleries/diverges shall be supported witha) Cross –bars set over cogs/props at a maximum interval of 1.2m along the

roof ,sides and roof against the cross bar shall be suitably tagged.b) Where width of gallery exceeds 4.5m, brick shall be provided on either side and

roof shall be supported by brick arching/reinforced concreting or cross bar set 1.2m apart with adequate laggings.

c) Where the gallery height is more (more than normal ), steel chock or timber lagging shall be used over steel girder.

14. GAS DETECTION

ENVIRONMENTAL TELEMONITORING SYSTEM

o Environmental Tele-monitoring System comprises of surface monitoring/recording room, underground outstation and sensors (like CH4, CO etc.). Additional sensors may be adopted in the existing systems which have the facility of upgrading up to eight sensors per outstation.

o Necessary interlocking arrangement with the U/G control switch gears can be done to control supply when percentage of inflammable gas exceeds above 1.25%.

DGMS approval no – 16/2009

Approval valid up to – 12.10.2012

S.N of sensor – 0124

Place of installation -7L

1st alarm setting -0.7 (vol)

2nd alarm setting with tripping (1.2%) vol

Location : OS1-NEW DIP

OS2-7 Level, 17th x-m

Sensor location- Pragati khani out bye of 11th x-m

1. DGMS Approval no. (field trial)S660021/27/2006- General/ 2093 dt, 24-08-10

2. Date of installation -16.09.20103. Make- tholex (service provider) – M/S vmpl4. Date of expiry of CH4 sensor element 2 years5. Date of expiry of CO sensor element 2 years6. Range of CO sensor-max 500m from O/S units7. Range of CH4 sensor-max 500m from O/S units

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8. 1ST Alarm setting of CH4 sensor= 0.6%

LOCAL METHANE DETECTORS

1. Local Methane Detectors (L.M.D.) with audio-visual alarm and tripping relay circuits are placed to address the issue of emission of methane gas in coal faces.2. Necessary interlocking arrangements with the face machinery control switch gears can be done to control power supply when percentage of inflammable gas exceeds more than 1.25%.

Out of 3 no’s of LMD , 2 no’s have already been installation at Dip mine. One has been installed at 7th x-m of new dip and another has been installed at main return of Pragati Khani.

15. DRILLING AND BLASTING Once the face is advanced for more than 6.0m,the coal mass between the two sub-levels 12-16m is drilled by long hole drilling at around 3 holes per square meter with a maximum length of 10m .Each hole is charged with around 1.5 kg of security explosives, stemmed with salt cartridges (to prevent ignition) and clay stemming materials, and blasted at a time to get a pull of 1.0m.

Drawing of blasted coal :Blasted coal from roof massif caves /flows down due to gravity through the windows (made by cutting the wire nets at around 4.0m interval of size 0.5-1.0m X 0.5-1.0m )onto the rear chain conveyor of evacuating coal out of the face .The coal flow is controlled manually by closing/opening of the windows so created. As soon as flow of cave rock starts along with coal the window is closed and the operation is shifted to another such window till there is flow of coal. The success of the sub-level caving depends the fracturing of the coal massif, coal strength and angle of internal friction leading to higher level of coal recovery.

16. MEN TRANSPORTATION

At Present

1.Workmen has to walk from surface Incline top to -7 L Incline bottom via companion /traveling dip at an inclination of 1 in 4 for 438 mts.

2. From the Incline bottom, Workmen has to travel on foot for 2.1 KM at -7L horizontal to reach the face.

3.For working at New Dip -12 L ,workmen has to walk from New dip top to 10 X-M at new dip via companion /Traveling dip aligned at an inclination of 1 in 3 for 235 mts.

4. At Pragati 0L, workmen have to be travel in level for a distance of 2 KM from mine entry.

5. For working between 0L & -7L, workmen has to travel through ladders fixed in traveling raises of dimension 850 mm/1000mm diameter.

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Observation

1. Efficiency of workmen gets reduced by 35% as non effective working hours (traveling &rest) for entry &exit has gone up to 3 hrs in 8hrs shift due to extended traveling range.2. Movement of persons is arduous in nature.3. D.G.M.S. has directed to install man riding arrangement in view of long & arduous traveling.4. People are to travel in steep gradient.

Benefits

1. Jump in efficiency of operation

2. Increase in period of effective working hrs.

3. Human friendly operation.

4. Timely transportation of men &material resulting in improved availability of materials for face operation.

5. Quick withdrawal or entry of persons especially during emergency.

MATERIAL TRANSPORTATION

At present

Material transportation is affected in coal tubs or trolleys through Main & Tail haulage at 0 L &-7L levels.

Though incline at Dip Mine & New Dip, material transportation is through direct haulage.

From level places materials are transported to working places manually &from those places through steeply inclined raises to lower working levels.

Whole operation is manual in nature, time consuming, involving large number of persons & dependent on adaptability of workmen along steeply inclined working planes.

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17. ENERGY CONSUMPTION

The annual energy consumption on the basis of load (proposed) 2300kW has been estimated to be 7.2MkWh.

MAJOR LOADS

Pumps 700 kW 7 nos.MMV 250 kW 1 nos.Raise boring machine 525 kW 3 nos.Main belt conveyor (U/G) 100 kW 2 nos.Chain conveyor 60 kW 4 nos.Main and Tail Haulage 100 kW 1 setDrilling/compressors 10 kW 1 nos.Auxiliary-fan 90kW 6 nos.Coal drill 110 kW 2 nos.Miscellaneous 30 kWTotal 1975 kW

18. MINE PUMP

1. ROTODYNE- 1 (4TMS) PUMP Model: 4TMS

Capacity: 600 GPM

Head: 150 m

Speed: 1500

Prime mover: 150 hp, 1500 rpm

Type of bearing:(i) Journal Brass Bush Bearing

(ii) Thrust Ball Bearing no 51311

Type: Centrifugal

Balancing: With balance valve & seat

Location: Lower Pump House (-7 L)

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2. ROTODYNE- 2 (4TMS) PUMP Model: 4TMS

Capacity: 600 GPM

Head: 150 m

Speed: 1500


Type of bearing:(i) Journal Brass Bush Bearing

(ii) Thrust Ball Bearing no 51311

Type: Centrifugal


Location: Lower Pump House (-7 L)

3. KIRLOSKAR – 1( MN-5) PUMP Model: MN 5

Capacity: 400 GPM

Head: 150 m

Speed: 1500 rpm

Pump Mover: 100 HP, 1500 rpm

Types of bearings: Single row roller bearing N311 for both suction and delivery

Type: Centrifugal


Location: Lower Pump House

4. KIRLOSKAR – 2 ( MN-5) PUMP Model: MN 5

Capacity: 400 GPM

Head: 150 m

Speed: 1500 rpm

Pump Mover: 100 HP, 1500 rpm

Types of bearings: Single row roller bearing N311 for both suction and delivery

Type: Centrifugal


Location: DT-1Pump House

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5. KSB 125/7 PUMP Type: Centrifugal

Model: WK 125/7

Capacity: 400 GPM

Head: 150 m

Speed: 1500 rpm


Type of bearing: (i) Taper Bore Roller Bearing No: NU 210 ECKP C3 with sleeve and suction side

(ii) Ball Bearing 6406 on delivery

Balancing: Dynamically balanced

Location: Upper Pump House

6. KSB 125/5 PUMP Type: Centrifugal

Model: WK 125/5

Capacity: 400 GPM

Head: 125 m

Speed: 1500 rpm


Type of bearing: (i) Taper Bore Roller Bearing No: NU 210 ECKP C3 with sleeve and suction side

(ii) Ball Bearing 6406 on delivery


Location: Upper Pump House

7. KIRLOSKAR DSM 150/52

Type: Centrifugal, Horizontally split, volute casing, 2 stage

Model: DSM 150/52

Capacity: 1000 GPM

Head: 150 m

Speed: 1590 rpm


Type of bearing: Single Row Angular contact roller bearing 7314


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Location: Lower Pump House

19. COMMUNICATION

For effective management of different production, service units and for ensuring safety, the following communication facilities have been envisaged for Tipong U/G (0.2 MTpa)

- Administrative communication- Data Communication System

The following different types of administrative and data communication systems have been envisaged.

IP Enabled Exchange with a capacity of 250 lines upgradeable to 500 lines. The exchange shall be housed at the Administrative Office and shall cater to various production units, quarry workings, workshops, PCM-TDM technique with a non-blocking structure. The EPABX will preferably employ latest features like E1 port, LAN/WAN port etc. EPABX shall be interfaced with BSNL exchange for extending external communication having STD & ISD facility. Self diagnostic facility shall be provided for EPABX extensions. Sufficient number of junction lines is to be provided for terminating BSNL, Tie and Trunk lines

NETWORKING FACILITY

Exchange is required to operate in any one of the following and shall be suitable for both.

i. BSNL exchangeii. Exchange should also be able to inter-face directly with OC/DECT

systems if required.

FEATURES

a. Flexible numbering scheme.b. Privacy of calls.c. DTMF DID facility junctions.d. Conferencing.e. Automatic call back on busy extension.f. Call transfer and call pick up.g. Last number redials.

EXTERNAL BSNL TELEPHONE COMMUNICATION SYSTEM

Twenty telephone lines with an EPABX interface have been provided for BSNL communication and access to public communication grid. These telephone sets would be located in the residences and offices of key personal of the project, sub-station, railway siding, Coal Handling Plants etc. Besides connection from BSNL other service provider may also be provided to important personal of the project.