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Shock and Vibration
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2017
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Article
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Tab 2
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Research Article
Surrounding Rock Deformation Mechanism and Control Technology for Gob-Side Entry Retaining with Fully Mechanized Gangue Backfilling Mining: A Case Study
Table 2
Similar material ratios.
Relative position of rock
Rock type
Compressive strength (MPa)
Dry material composition (%)
Water content (%)
Sawdust (%)
Prototype
Model
Sand
Lime
Plaster
Roof
Medium sandstone
120
1.44
30
9
61
14.3
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Siltstone
90
1.08
30
35
35
14.3
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Coal seam
Coal
20
0.36
40
42
18
11.1
2
Floor
Mudstone
45
0.54
70
9
21
11.1
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Fine sandstone
85
1.02
30
35
35
14.3
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RBB
Gangue concrete
8
0.096
80
10
10
11.1
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