Coal waste pile Kateřina, part IC
THE CZECH REPUBLIC
I. THE CZECH PART OF THE LOWER SILESIAN BASIN
Fig. C_38 (Radvanice, CR). Debris of grey porcelanites covered and cemented by grey
glass created in central part of coal waste pile under the reduction conditions at
temperature 1350°C (laboratory determined). Carbon black and metacoke are present in
glass and porcelanites. Photo by Jiří Ščučka, 2008.
Fig. C_39 (Radvanice, CR). Debris of light porcelanites cemented by dark glass with
hematite in oxidative conditions at temperature 1350°C (laboratory determined).
Porcelanites are leached out by vapour of sulphuric acid. These porcelanites are very
resistant against mechanical disintegration and blasting. For physical properties of these
materials see Figs C_54, C_55 and C_56. Photo by Jiří Ščučka, 2008.
Fig. C_40 (Radvanice, CR). Debris of light porcelanites cemented by dark glass with
hematite in oxidative conditions at temperature 1350°C (laboratory determined).
Porcelanites are leached out by vapour of sulphuric acid. These porcelanites are very
resistant against mechanical disintegration and blasting. For physical properties of these
materials see Figs C_54, C_55 and C_56. Photo by Jiří Ščučka, 2008.
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Coal waste pile Kateřina, part IC
Fig. C_46 (Radvanice, CR). Debris of light porcelanites cemented by dark glass with
hematite in oxidative conditions. These porcelanites are very resistant against mechanical
disintegration and blasting. For physical properties of these materials see Figs C_54, C_55
and C_56. Photo by Petr Martinec, 2008.
Fig. C_47 (Radvanice, CR). Debris of light porcelanites covered and hard cemented by
dark glass with macropores formed by degasification of glass melt. Hematite, black carbon
and crystals of mullite are dispersed in glass. Photo by Josef Polák and Zdeněk Klika,
2008.
Fig. C_48 (Radvanice, CR). Debris of light porcelanites covered and hard cemented by
dark glass with macropores formed by degasification of glass melt. Hematite, black carbon
and crystals of mullite are dispersed in glass. Photo by Josef Polák and Zdeněk Klika,
2008.
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Coal waste pile Kateřina, part IC
Fig. C_51 (Radvanice, CR). Light-colored porcelanites cemented by dark glass. Photo by
Petr Martinec, 2008.
Fig. C_52 (Radvanice, CR). Sorting of waste porcelanite rocks in coal waste pile slope.
Photo by Petr Martinec, 2008.
Tensile strength /MPa/
12
y = 9E-13x3,8879
R2 = 0,8592
10
8
6
4
2
0
0
500
1000
1500
2000
2500
Bulk density /kg.m-3/
Voids content /%/
Fig. C_54 (Radvanice, CR). Plot between tensile strength and bulk density of porcelanites
cemented by glass in coal waste pile. (Cubic samples 60 x 60 x 60 mm).
50
45
40
35
30
25
20
15
10
5
0
y = 1E+07x -1,8818
R2 = 0,4145
0
500
1000
1500
2000
2500
Bulk density /kg.m-3/
Fig. C_55 (Radvanice, CR). Plot between voids contents and bulk density of porcelanites
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Coal waste pile Kateřina, part IC
Compression strength /MPa/
cemented by glass in coal waste pile. (Cubic samples 60 x 60 x 60 mm).
140
120
y = 3E-17x 5,5062
R2 = 0,8848
100
80
60
40
20
0
0
500
1000
1500
2000
2500
Bulk density /kg.m-3/
Fig. C_56 (Radvanice, CR). Plot between compresion strength and bulk density of
porcelanites cemented by glass in coal waste pile. (Cubic samples 60 x 60 x 60 mm).
Fig. C_57 (Radvanice, CR). Injection material after thermal treatment in burned out coal
waste pile Kateřina. This porcelanite consist of glass, gehlenite, mullite and Na-Ca
feldspar. The precursor of this porcelanite was suspension for fire suppression of burning
coal waste pile. It consists from bentonite, cement, fine fly ash and lime. Photo by Jiří
Ščučka, 2008.
Fig. C_58 (Radvanice, CR). Sulphate crust composed of thermally altered rock is
cemented by sulphate mineralization and it was sampled from the top of coal waste pile
(see Figs. D1_82 and D1_83). Sulphates consist mainly of the mix of millosevicite,
godovikovite and native sulphur. Photo by Jiří Ščučka, 2008.
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Coal waste pile Kateřina, part IC
Fig. C_59 (Radvanice, CR). Gravitationally sorted porcelanites on the slope of coal waste
pile. In the fine grained fragments (grey parts of coal waste rock) the thermal
transformation in reduction conditions occurs. The violet and red parts of waste rocks rich
in hematite with Al-substitution and mullite have been formed under oxidative conditions.
Photo by Petr Martinec, 1999.
Fig. C_61 (Radvanice, CR). Typical porcelanite from the high temperature parts of coal
waste pile. Photo by Petr Martinec, 2000.
Fig. C_67 (Radvanice, CR). The cut through basal part of the coal waste pile in the
position of contact between altered rocks at oxidative (red) and reductive (black)
conditions. There is also rocks altered under reduction condition that were subsequently
oxidized (right bottom corner). Photo by Petr Martinec, 2001.
Fig. C_68 (Radvanice, CR). The cut through basal part of the coal waste pile in the
position of contact between altered rocks at oxidative (red) and reductive (black)
conditions. Photo by Petr Martinec, 2001
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Coal waste pile Kateřina, part IC
Fig. C_72 (Radvanice, CR). Thin section of the porcelanite cemented by glass. Glass with
mullite, gehlenite and hematite and gas bubbles. Laboratory determined temperature of
melting point of glass is 1386°C, temperature of flow point 1525°C. Optical microscopy,
thin section, parallel nicols, 100x. Photo by Petr Martinec, 1998.
Fig. C_73 (Radvanice, CR). The same sample as in Fig. C_72. Optical microscopy, thin
section, crossed nicols, 100x. Photo by Petr Martinec, 1998.
Fig. C_74 (Radvanice, CR). Porcelanite cemented by glass with mullite, gehlenite and
hematite. Temperature of melting point of this glass is 1386°C, temperature of flow point
1525°C. Optical microscopy, thin section, paralel nicols, 85x. Photo by Petr Martinec,
1998.
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Coal waste pile Kateřina, part IC
Fig. C_75 (Radvanice, CR). Porcelanite cemented by glass. Amorphous glass contains
crystals of mullite, gehlenite, hematite and gas bubbles. Optical microscopy, thin section,
oblique nicols, 85x. Photo by Petr Martinec, 1998.
Fig. C_76 (Radvanice, CR). Thermally transformed sandy siltstone with transformed clay
matrix. Thermal alteration of rock took place in oxidative conditions; temperature of
alteration about 700°C. Optical microscopy, thin section, oblique nicols, 100x. Photo by Petr
Martinec, 1998.
Fig. D1_82 (Radvanice, CR). Test pit in sulphate crust (thickness approx. 20 cm) with hot
gasses emission. The rocks on the surface of the coal waste pile are cemented by white
sulphate mineralization. Photo by petr Martinec, 1997.
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Coal waste pile Kateřina, part IC
Fig. D1_83 (Radvanice, CR). Test pit in sulphate crust with hot gasses emission. The
rocks on the surface of the coal waste pile are cemented by white sulphate mineralization.
Photo by Petr Martinec, 1997.
Fig. D1_84 (Radvanice, CR). Secondary Na-sulphate minerals (thenardite, mirabillite,
trona) on porcelanites near the base of the burned coal waste pile. Photo by Petr Martinec,
1997.
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