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Mathematical Problems in Engineering
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Special Issues
Mathematical Problems in Engineering
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2015
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Article
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Tab 16
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Research Article
Hierarchic Analysis Method to Evaluate Rock Burst Risk
Table 16
Roof control and quantitative scores.
Distance from hard and thick roof to coal seam/m
<100
100–80
80–60
60–40
<40
Scores
2
4
6
8
10