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Jan Palarski 

Silesian University of Technology, Gliwice Poland 

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Prof. J. Palarski

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UNIT

Hard Coal resources (recoverable resources) (Bt) 40 (4)

Hard Coal Production (Lignite) (Mt) 76,6 (58)

Domestic Consumption (Mt) 70

Waste Production (Mt) 34

Underground Waste Disposal (backfill, grouting of

gob, ... )

- waste rock + tailing + slime(Mt)

4,0

CHARACTERISTICS OF POLISH HARD COALMINING INDUSTRY (2010)

 

-CCBs 2,7

Volume of Pumped Water and Sewages (Mm3) 189

Total Chloride and Sulphate Loading (Mt) ca 1,5

Production of CCBs (Mt) 13,0

Number of Longwalls - 99

Number of Closed Mines (years 1989- 2009) - 47

Length of Filling and Sealing Workings (km) ca 3700 (years 1993-2009)

Length of Filling Shaft (km) ca 110 (years 1993-2009)

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Mining Methods

Longwall with Backfill

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Longwall with Grouting of Gob

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Methane concentration tendency: gathering in roof cavities and gob and

creation of layer along the roof of working face (airways)

CH4

CH4

ŚCIANA

CH4

CH4

CH4

CH4

CH4

CH4

CH4

70 ÷ 100% CH4

25%

CH450%CH470%CH4

50%CH4

25%CH470%CH4

CH470%CH4

Prof. J. PalarskiSUT Gliwice, Pl 

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  + 2 

/

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+ 2 

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BACKFILL MIXTURE

MaterialMaterial ++ WaterWater ++ BinderBinderFly AshFly Ash CementCement

SlagSlag Mine waterMine water Fly ashFly ash

SandSand Salt content < 70 g/lSalt content < 70 g/l Blast furnace slagBlast furnace slag

 as e rocas e roc n ern er nova,nova,TailingsTailings Ground waste glassGround waste glass

NaturalNatural pozzolanspozzolans

GypsumGypsum

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WASHERYREFUSE SILO

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FILL PLANT - 3000 m3/day

Fly ash discharge and storage

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Surface plant – preparation of mixture

 Prof. J. Palarski

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Fly ashFly ashFly ashFly ash

 Water Water Water Water

TailingsTailingsTailingsTailings

Cavings areaCavings areaCavings areaCavings area

to be filledto be filledto be filledto be filled

 with grout  with grout  with grout  with grout  LongwallLongwallLongwallLongwall

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Shaft Shaft Shaft Shaft 

Grout transportGrout transportGrout transportGrout transport

pipelinepipelinepipelinepipeline

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:

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FILLING OF WEBER VOID

Sandstone

Void

Pipeline

Shale

Mixture

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Prof. J. Palarski

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