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collapsed rocks (1) |
deformation-strength characteristics (1) |
preparatory mine working (1) |
roof rocks rigidity (1) |
stress-strain state (1) |
support (1) |
collapsed rocks (1) |
deformation-strength characteristics (1) |
preparatory mine working (1) |
roof rocks rigidity (1) |
stress-strain state (1) |
support (1) |