work.. in progress.

The aim of this work, is to analyze the fracture network in a sample of coal scanned using X-Ray tomography. The different parameters we are looking for are: the percent of empty fracture and the percent of fracture full of ... .

Here are some slices acquired using X-Ray tomography and their associated profile.

Slice "1923266"  
Slice "1936297"  
Slice "1940326"  

Primilary results on 300 slices of MAR 1.

Direction of empty fractures, in number of voxels

  direction X 1 direction X 2 direction X 3 direction X 4 direction X 5
direction Y 1 4281 5174 2237 3911 529
direction Y 2 5727 45077 87743 28951 7316
direction Y 3 2465 46644 363157 40410 12657
direction Y 4 4174 28794 64079 27734 6663
direction Y 5 1066 6618 16260 6943 42263

Direction of empty fractures, in percent of total empty fractures

  direction X 1 direction X 2 direction X 3 direction X 4 direction X 5
direction Y 1 0.49 0.60 0.25 0.45 0.06
direction Y 2 0.66 5.23 10.19 3.36 0.84
direction Y 3 0.28 5.41 42.18 4.69 1.47
direction Y 4 0.48 3.34 7.44 3.22 0.77
direction Y 5 0.12 0.76 1.88 0.80 4.90

Direction of filled fractures

  direction X 1 direction X 2 direction X 3 direction X 4 direction X 5
direction Y 1 2059 655 652 508 792
direction Y 2 812 48064 152609 35326 10714
direction Y 3 1096 165229 1836347 142952 23591
direction Y 4 765 39957 130805 29899 10337
direction Y 5 1140 8853 15473 8005 20038

Direction of filled fractures, in percent of total filled fractures

  direction X 1 direction X 2 direction X 3 direction X 4 direction X 5
direction Y 1 0.07 0.02 0.02 0.01 0.02
direction Y 2 0.03 1.78 5.68 1.31 0.39
direction Y 3 0.04 6.14 68.35 5.32 0.87
direction Y 4 0.02 1.48 4.86 1.11 0.38
direction Y 5 0.04 0.32 0.57 0.29 0.74

Explaination of directions:

Is assigned to direction 5 points for which result is not sure.

 

3D visualisation of fractures:

The vrml image can been seen using the Cortona vrml plugins.

 

 

 


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last update: 07.12.2012