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1. SUMMER TRAINING PROJECT REPORT ON
Durgapur Rayatwari Colliery (DRC UG Mine),Western Coalfield Limited
Chandrapur area,Maharastra
(01 June-30 June,2017 )
Department of Mining Engineering
College Of Technology and Engineering, Udaipur
SUBMITTED BY:-
1. VIKRAM SINGH RAJPUROHIT
2. SHUBHAM VIJAYVARGIYA
3. BHAWANI SHANKAR SHARMA
4. SOURABH
5. AJAY KUMAR PATIDAR

2. ➢ Contents:-
➢Introduction
➢General information about Mine
➢Geology of the mine
➢ Method of working
➢ Mining Operations
➢ Supports
➢ Ventilation
➢ Mining Machineries
➢ Survey
➢ Safety

3. INTRODUCTION
➢The parent company and subsidiary of DRC UG Mine is COAL INDIA LIMITED and
WESTERN COALFIELD LIMITED.
➢The head office of WCL is at NAGPUR( Maharastra).
➢The mine is situated at WARDHA RIVER BELT.
➢Durgapur Rayatwari Colliery is the largest underground mine of Chandrapur Area.
approximately 165 Km away from Nagpur by road.
➢The mine has common boundary with Chanda Rayatwari Colliery and DRC 6,7,8 (Sinala UG
project).
➢The mine as part of Chanda Rayatwari Colliery and become a separate mine in the year 1982.
➢The mine has three entries and two airshafts. DRC 6,7 & 8 has two entries and one return
airway.

4. DRC UG MINE
CRC UG MINE
MAHAKALI UG MINE
Location Plan Of Durgapur Rayatwari Colliery

5. General Information Of The Mine
➢Name of the Mine: Durgapur Rayatwari Colliery, Chandrapur Area
➢Address of the Mine: Durgapur Rayatwari Colliery, By pass Road,
Chandrapur
➢Date of opening : 08 July 1982
➢Average Monthly Output: 12442 MT
➢Leasehold Area: 1392.18 Hectare,
➢Approx. life of mine: 25 Years (Approx.@500tpd)
➢Grade of Coal: G-7
➢Average Daily Output 450 tones
➢Degree of Gassiness Degree –1
➢Ignition Point Temperature 197°C (Top Section) & 179°C (Bottom Section)
➢AV. Adjusted R.M.R 43(for DRC No.-03 incline Unit)
➢Incubation period 18months
➢Strike & dip direction 4.2km &1.5km

6. MINE ENTRIES
S.NO. Name of entry Cross-section Gradient Length Purpose for
1. No.3 incline 4.28mx2.40m 1:5 250m Conveyor Belt, Travelling Road & Material
Transport/Intake Airway
2. No.4 incline 4.20mx2.40m 1:5 150m Conveyor Belt & Travelling Road/Intake
Airway
3. No.5 incline 3.60mx3.00m 1:5 150m Material Transport/Intake Airway
4. Air-shaft Dia-4.80m Vertical Depth-54.0m Return Airway
5. Air-shaft Dia-4.80m Vertical Depth-31.0m Return Airway

7. SUB STATION CONVEYOR BELT
4 NO. INCLINE LAMP ROOM

8. BUNKER DUMPING YARD
WORKSHOP
FILTER PLANT

9. Geology Of Mine
➢Name of Seam Being worked with stage of working:
S. No. Seam Thickness Direction/
Avg. Dip
Depth Of Working
Max. Min.
Stage of Working
Development Depillaring
1. Rayatwari Avg.
16.87m
N 85
Degree E
1 in 5
225m 24m 01(Panel-
41A) District
02(Panel-39 &
40)
Geological disturbances:
Fault: - One down throw fault on southern boundary to the mine openings.
1. Throw: - 70m(approx.
2. Angle of Hade: - 70⁰(approx.)

11. Method Of Working
Bord And Pillar With Sand stowing method
The following sequence of working was observed during field visit:
➢ Development working:-” development was done by drivage of level & dip gallery in the bottom section of 1st
lift of 3m height & 25m length in panel system.”
➢ Depillaring of Developed Pillar:-” Each pillar so developed is divided in to two equal halves by driving
level split & dip slices towards the goaf, maintaining a rib of coal against adjacent goaf.”
➢ Sand stowing operation:-” The void created as a result of driving slice is completely filled with sand”.
➢ 2nd lift extraction:-” Extraction of 2nd lift is commenced in such manner that original gallery, split gallery &
slice are driven exactly over the 1st lift”’
➢ Line of extraction:-” Extraction of pillars is commenced by maintaining a diagonal line of extraction.”
➢ Final Operation:-” After complete extraction of the panel, it is sealed off by isolation stopping.”

12. Bord and Pillar Method

13. SAND STOWING
➢Flushing capacity: 30m³/hr

14. DRILLING
➢Drilling is done by “Portable Drilling machine”.
➢The holes of 32 mm diameter and depth 1.5m are drilled by Portable Drilling Machine.
➢0.5 m is filled with cartridges and rest 1 m is filled by stemming.
➢The drilling pattern adopted is “WEDGE CUT” pattern.
➢11 holes wedge cut pattern is used.

15. WEDGE CUT PATTERN

16. BLASTING
➢ The P5 or Pent dyne explosive is used for blasting.
➢ 3 Cartridge are used in per hole.
➢ 1 cartridge have a weight of 185gm.
➢ Priming cartridge is a cartridge in which detonator is attached.
➢ Ordinary Electrical detonator is used.
➢ After connection of wires blasting is done with the help of Exploder.
➢ Blasting voltage is 9V.
➢ Series connection is used for blasting.
❑ Quantity of explosive:
➢ 1 hole: 3x185=555gm
➢ 11 holes: 11x555=6105gm/blast
➢ Output per blast: 11tonns

17. S.No
.
SUPPORTS LOCATION CAPACITY
1. Timber Support Gallery 6-8 Tonne
2. Sylvester Prop Gallery 10-15 Tonne
3. Small Chock support Gallery Up to 25 Tonne
4. Large Chock support Gallery Up to 50 Tonne
5. W strap Gallery Per Bolt 10
Tonne
6. Roof Stitching Walls
7. Roof Bolting At Roof on
working face
Per Bolt 8
Tonne
8. Lagging Walls
SUPPORTS

18. Strata Monitoring Instrument
Tell-Tale

19. Indicator Prop
It is a safety device use for indication of strata load.It is thin from middle part so when strata load
is high than it breaks from middle of prop.

20. Ventilation
Air Quantity:
Intake: Return:
DRC No.-03 Incline: 2500m³/min Air Shaft(0L/32D): 3100m³/min
DRC No.-04 Incline: 1100m³/min Air Shaft(-4L/94D): 3250m³/min
Total Return: 6350m³/min
DRC No.-05 Incline: 2500m³/min
Total Intake: 6100m³/min
Parameters Panel-39 Panel-40 Panel-41A
Development/Depillaring Depillaring Depillaring Development(Top Section)
Intake(m³/min) 600 570 570
Return(m³/min) 615 600 600
Temperature at face(°C) 29 29 30
Relative-Humidity(RH) at Face 90 90 93
Ventilation Quotient(VEQ) 60% 60% 70%

21. ➢There is a three mechanical ventilators at different location in DRC UG Mine.
➢Ventilation Control
1. Isolation Stopping: Existing: - 284 nos.
Accessible: - 261nos.
Incomplete: - 12 nos. (In tendering process)
2. Doors/Air Locks
3. Air Crossings
Parameters PV 200V PV 200V PV 300V
Fan RPM 880 940 940
Operating Voltage 3.3V 550V 3.3V
Location No.-03 Incline No.-05 Incline No.-03 Incline

23. MINE-MACHINARIES
Side Discharge Loader
➢No. of SDL: 08
➢Bucket Capacity: 1.1 m3
➢Electric motor: 65 HP/550 volts
➢Travelling Speed: 3 Km/hr
➢Operating Weight:8900 Kg

24. HAULAGE
Direct Haulage:
There are four no. of direct haulages in the mine which hauls the coal loaded tubs up to the tippler.
Make Length Type Gradient HP/KW Remarks
Rana 1000 m Direct Rope 1 in 5 110 KW Surface
Rana 300 m Direct Rope 1 in 5 57 KH 115 Rise
Voldrum 200 m Direct Rope 1 in 5 37 KW 128 Rise
Rana 200 m Direct Rope 1 in 5 37 KW 121 Rise
Endless Haulage:
There are two endless haulages working at present which hauls the coal loaded tubs from the working face
and transfer it to direct haulage.
Make Length Type Gradient HP/KW Remarks
Rana 1000 m Endless Rope 1 in 14+ 37 KW 28 Level
Rana 500 m Endless Rope 1 in 14+ 37 KW 5 Level

25. MECHANICAL TIPPLER
Run off mine coal is transferred to the mechanical tippler with loaded tub through a series of haulages from where
it is again transferred to strata bunker by mechanically operated tippler.

26. Conveyor Belt
➢ There are two belt conveyors TB1 (Surface) & TB2 (Underground) in the mine.
Conveyor No. Belting Length Size Gradient HP/KW Remarks
TB1 PVC 200 m 1000 mm 1 in 5 75 KW Surface
TB2 PVC 200 m 800 mm 1 in 5 75 KW Underground

27. SURVEY
➢Instruments
1. Theodolite
2. Prismatic Compass
3. Automatic Level
4. Anemometer
➢ PLANS
1. Surface Plan
2. Line diagram of ventilation system
3. Bore-holes section
4. Emergency Plan
5. Separate Plan of each district with Section
6. Location plan

28. ➢Safety helmets
➢Flame safety lamp
➢Multi Gas Detector
➢Mining Shoes
➢Fire Extinguisher
➢Life Oxygen Bag
➢Stretcher
➢float alarm
➢Audio Visual Alarm
➢Dust Mask
➢Safety Goggles
➢Hand Gloves
➢Safety Chamber/Rescue Chamber
SAFETY DEVICES

29. Rescue Chamber
➢Capacity: 50 Person
➢Ventilation Fan: 300 m3
➢First Aid Available
➢Drinking water available
➢Air tight/Water tight
➢Telephonic Communication
➢Arrangement for supply of food or water