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Influence of Humidity on the Energy of Specific Strain in the Process of Loading Sedimentary Rocks

Mirosława Bukowska
Mirosława Bukowska
 and 
Anna Smolorz
Anna Smolorz
   | Dec 30, 2019
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Article Category: Research Articles
Published Online: Dec 30, 2019
Page range: 223 - 230
Received: Apr 10, 2019
Accepted: Sep 06, 2019
DOI: https://doi.org/10.2478/sgem-2019-0033
Keywords
© 2019 Mirosława Bukowska, Anna Smolorz, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Location of polish part of the Upper Silesian Coal Basin, Poland.
Location of polish part of the Upper Silesian Coal Basin, Poland.

Figure 2

Conditions of experiments and parameters (ϕ – diameter of a sample; h– height of a sample).
Conditions of experiments and parameters (ϕ – diameter of a sample; h– height of a sample).

Figure 3

Balance of specific energy of compressed sample of rock (ᓂ - stress; ℇ - strain) [1].
Balance of specific energy of compressed sample of rock (ᓂ - stress; ℇ - strain) [1].

Figure 4

Graphic presentation of average values of elastic energy of clastic rocks and clay rocks of Załęże Beds, Ruda Beds and Saddle Beds of the USCB in air-dry state and in water saturation state.
Graphic presentation of average values of elastic energy of clastic rocks and clay rocks of Załęże Beds, Ruda Beds and Saddle Beds of the USCB in air-dry state and in water saturation state.

Figure 5

Graphic presentation of average values of dissipated energy of clastic rocks and clay rocks of Załęże Beds, Ruda Beds and Saddle Beds of the USCB in air-dry state and in water saturation state.
Graphic presentation of average values of dissipated energy of clastic rocks and clay rocks of Załęże Beds, Ruda Beds and Saddle Beds of the USCB in air-dry state and in water saturation state.

Figure 6

Dependence average of elastic energy (a) and dissipated energy (b) of clastic rocks and clay rocks of different ages on uniaxial compression strength in air-dry state
Dependence average of elastic energy (a) and dissipated energy (b) of clastic rocks and clay rocks of different ages on uniaxial compression strength in air-dry state

Figure 7

Dependency average of elastic energy (a) and dissipated energy (b) of clastic rocks and clay rocks of different ages on uniaxial compression strength in water saturation state
Dependency average of elastic energy (a) and dissipated energy (b) of clastic rocks and clay rocks of different ages on uniaxial compression strength in water saturation state

Average values of energy and stress parameters of tested sedimentary rocks of the USCB.

Lithostratigraphic Series/ Bedsair-dry statewater saturation state
uniaxial compression strength, MPaelastic energy, kJ/m3dissipated energy, kJ/m3uniaxial compression strength, MPaelastic energy, kJ/m3dissipated energy, kJ/m3
sandstones
Mudstone Series/Załęże38.3–112.5108.880–304.091–28.8–75.5104.941–230.053–
Beds392.147838.938224.812509.024
Upper Silesian Sands-51.4–113.5147.846–260.903–29.9–79.888.049–205.723–
tone Series/Ruda Beds and Saddle Beds410.281829.553262.362567.799
Mudstones
Mudstone Series/Załęże23.2–44.663.881–196,431–21.6–37.062.431–145.995–
Beds188.821411.404131.335243.183
Upper Silesian Sands-44.4–81.4135.826–281.942–21.4–52.085.708–187.339–
tone Series/Ruda Beds and Saddle Beds347.182682.093194.954348.384
Claystones
Upper Silesian Sands-35.1–74.4112.239–217.989–8.8–52.944.644–119.035–
tone Series/Ruda Beds and Saddle Beds247.469532.515211.095392.818

Functional dependencies of elastic energy and dissipated energy on uniaxial compression strength of sedimentary rocks of Załęże Beds, Ruda Beds and Saddle Beds of the USCB.

Type of rockAir-dry stateWater saturation state
Elastic energy, kJ/m3Dissipated energy, kJ/m3Elastic energy, kJ/m3Dissipated energy, kJ/m3
equation/ correlation coefficientequation/ correlation coefficientequation/ correlation coefficientequation/ correlation coefficient
Clastic rocks and clayEel = 3.537 UCS + 12.173Edys = 6.475 UCS + 88.761Eel = 3.213 UCS + 17.323Edys = 6.844 UCS + 39.869
rocksr = 0.83r = 0.78r = 0.89r = 0.83
Załęże Beds, Ruda BedsFig. 6aFig. 6bFig. 7aFig. 7b
and Saddle Beds
Clastic rocksEel = 3.675 UCS + 6.771Edys = 6.631 UCS + 93.17Eel = 3.163 UCS + 19.67Edys = 6.992 UCS + 34.327
Załęże Beds, Ruda Bedsr = 0.86r = 0.84r = 0.85r = 0.79
and Saddle Beds
SandstonesEel = 3.580 UCS + 15.743Edys = 6.218 UCS + 129.91Eel = 2.3973 UCS + 59.585Edys = 5.2139 UCS + 134.85
Załęże Beds, Ruda Bedsr = 0.83r =0.81r = 0.79r = 0.69
and Saddle Beds
MudstonesEel= 3.588 UCS + 7.735E=dys 6.483 UCS + 89.061Eel= 5.5486 UCS + 55.522E=dys 3.2295 UCS + 10.163
Załęże Beds, Ruda Bedsr = 0.82r = 0.78r = 0.85r = 0.81
and Saddle Beds
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Geosciences, other, Materials Sciences, Composites, Porous Materials, Physics, Mechanics and Fluid Dynamics
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