 |
| |||
| overhead caving; cover caving; weighing down | |||
| roof collapse; induced roof caving; collapse of a roof; blow; break of roof; collapsing of roof; weighing-down (выработки) | |||
| collapse of roof; overhead sloping | |||
| crown-in | |||
| overhead roof caving (при пожаре) | |||
| roof caving; roof fall; top failure | |||
| nip | |||
| fall of roof (подземной выработки) | |||
| back failure (transler) | |||
| |||
| root collapse | |||
| обрушение кровли: 25 do fraz, 7 tematyki |
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