Bord and Pillar development/depillaring with LHD/SDL

LOAD HAUL DUMPER

Applicability Condition

• Seam Thickness : more than 1.8m • Average seam Gradient : up to 1 in 7 • Suitable for weak floor as compared to SDL• Maximum speed 8-12 KMPH• Suitable for long distance

• Headings of 4.8 m width is driven• In a gallery auger holes are drilled in the middle of

the face upto 2m depth and shot holes are drilled upto 1.8m depth.

• P1 type permitted explosive with instantaneous type electric copper detonator is used.

• Coal is loaded by LHD on to chain conveyor which in turn transfer coal to the belt conveyor.

Load Haul Dumper

Model : EIMCO ELECON 811 LHDBucket capacity : 1.37 tonsElectric Motor : 37.5 KW 550 V Height : 1.95-2 mLength : 6.30 mWidth : 1.5 mSpeed : 1st gear 3.8 KMPH 2ND gear 7.2 KMPH 3rd gear 12.2 KMPH

Model EIMCO ELECON 912E

• Bucket Capacity : 2.7 tons• Electric Motor : 440 V 64.15 KW• Height : 2.11 – 2.78 m• Length : 7.55m• Payload : 4000 kg• Cable reel : 120 m

Caterpillar 243-5577 186-9278 243-6143 243-6224 157-3622

Bucket capacity(m3)

2.4 2.8 3.1 3.4 2.4

Bucket width over cutting edge (m)

1.950 2.010 2.200 2.400 2.200

Overall height-bucket raised(m)

4.23 4.30 4.30 4.30 4.30

Max dump height(m)

3.548 3.529 3.531 3.529 3.577

Dump clearance at max lift (m)

1.662 1.558 1.560 1.561 1.561

Digging depth (mm)

26 36 34 36 36

Dump angle at max lift(degree)

43 43 43 43 43

Reach (m ) 1.476 1.588 1.583 1.584 1.584

Overall width(m) 2.155 2.185 2.318 2.518 2.318

SIDE DISCHARGE LOADER

SDL SPECIFICATIONMODEL BUCKET

CAPACITYOPERATING WEIGHT

ELECTRICMOTOR

GROUNG PRESSURE

TRAVELLING SPEED

EIMCO ELECON 625

2.032 tons 8.9 tons 48.5 KW 0.94 Kg/cm2 3.0 kmph

M412 1.35 tons 8.5-9 tons 55 KW 0.9 kg/cm2 2.6 kmph

EIMCO ELECON 611

0.9 tons 9 tons 48 KW 0.96 kg/cm2 3.0 kmph

HAZEMAG TL 600 TL 800 TL 1200 TL 1500

Gross Loading capacity (m3/h)

40-55 50-80 60-100 80-130

Weight of machine

8.6 10.5 15.0 14.5

Bucket capacity 0.6 0.8-1.0 1.2 1.5

Travelling speed(m/s)

1.2 1.2 1.4 1.4

Discharge height(m)

1.7 2.6 2.45 2.4

Digging depth(mm)

350 600 500 650

Drive capacity 55-63 55-63 63-90 63-90

Length of machine

5.8 6.18 6.9 6.6

Width 1.2 1.32 1.4 1.7

Height (without canopy)

1.3 1.5 1.8 1.7

Ground pressure(N/cm2)

10.4 7.8 10.0 10.0

Radiant hydraulic face drilling machine

• Model : RMTL-HFD-1800 Jumbo drill• Operating pressure : 70 to 100 bar• Rotational speed : 400 to 600 rpm• Drilling diameter : 27 to 43 mm• Medium : DGMS recommended hydraulic oil• Noise level : below 70 dB• Approx weight : 12 to 14 kg

Atlas Copco face drill

Sandvick

Chain ConveyorMODEL Motor Power

(KW)Capacity (tph)Peak Avg

Width (mm) Speed( m/s)

LDCC Skat-60 2 X 15 90 60 420 0.87

LDCC PF-00 2 X 30 90 60 426 0.87

MDCC PF-I-500 1 X 452 X 30

250 200 632-640 0.65

MDCC PF-Iv-500

1 X 452 X 30

300 220 632-640 0.65

MDCC MIV -500

1 X 452 X 30

350 250 632-640 0.65

Belt Conveyor

Depillaring with LHD

• Average seam thickness : 4.5 m• Gradient : 1 in 7 to 1 in 8• Higher productivity• Minimum labour requirement• Limited roadway dimension

Support system

Production of different jumbo drills

• Width of heading(w) = 4.8 m• Height of gallery(h) = 3 m• No of faces (N) = 9• No of blast per face per shift = 1• Specific gravity of coal(Sg) = 1.4Production per blast = w*h*Hd*Sg *NWhere Hd= Hole depth in m

Model No Hole depth (m) Production per blast (t)

BMH2831 2.795 507.12

BMH2837 3.405 617.8

BMH 2843 4.015 728.5

BMH 2849 4.625 834.6

LHD• Average lead dis of LHD (d) = 60 m• Average speed of LHD (v) = 6 KMPH• Bucket capacity = b• Bucket fill factor(F) = 0.8• Loose coal density(D) = 0.9• Amount of coal loaded per trip = b*F*D = 0.72b• Cycle Time of LHD = 1+1+1.5 = 3.5 min• Hourly no of trips = 17• Hourly production of LHD = Hourly no of trips * 0.72b =

12.24 b

For no. of LHD,No. of LHD = (Total production/no. of hrs per shift * no of shift * hourly production of LHD) = 728 / 3 *3*12.24b = 6.67/b

Model No Bucket capacity (m3) No of LHD requiredCT243-5577 2.4 3

CT186-9278 2.8 3

CT243-6143 3.1 2

CT243-6224 3.4 2

CT157-3662 2.4 3

Eimco Elecon 811 1.52 5

Eimco Elecon 911 3 3

Production of different chain conveyors

Model No Capacity (tph)Peak Average

Capacity in tpdPeak average

MDCC PF-I-500 250 200 2250 1800

MDCC PF-Iv-500 300 220 2700 1980

MDCC MIV -500 350 250 3150 2250

Production of belt conveyorSandvik Belt

speed(m/s)

Power required(KW)

Belt width(mm)

Idler angle(degree)

Capacity(tph)

Production (tpd)

HC 500 1.25 3-7.5 800 25 100 900

HC 650 1.37 3-15 950 30 250 2250

HC 800 1.42 5.5-30 1150 30 400 3600

HC 1000 1.65 5.5-60 1350 30 700 6300

HC 1200 1.80 7.5-90 1600 30 1000 9000

HC 1400 1.25 15-90 1800 30 1300 11700

HC 1600 1.25 22-110 1900 30 1500 22500

ENDLESS ROPE HAULAGE• Avg Speed of Endless haulage = 5KMPH• Amount of coal to be handled = a• Length of the roadway on which ERH operates = 800 m• Capacity of coal tub = 1 ton• No of tubs = 800 * Amount of coal to be

handled per hour(a)/(Distance travelled by ERH per hour * capacity of coal tub)

Amount of coal to be handled per hour No of tubsLoaded Empties

200 32 32

220 36 36

250 40 40

DRH

• Avg Speed of Direct rope haulage = 10KMPH• Amount of coal to be handled = a• Length of the roadway on which ERH operates = 500 m• Capacity of coal tub = 1 ton• No of tubs = 500 * Amount of coal to be

handled per hour(a)/(Distance travelled by DRH per hour * Capacity of coal tub )

Amount of coal to be handled per hour No of tubs

200 10

220 11

250 13

Power Supply DistributionEquipment Load in KW

MAIN VENTILATION FAN 75

Belt conveyor 180

Direct Haulage 90

Endless haulage 111

Load Haul Dumper 37

Roof bolting machine 75

Auxiliary fan 15

Face pump 7.5

Chain conveyor 2 x 45