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机译:
机译:Crack propagation at edges of coal pillars and the disaster zoning in surrounding rocks in lower coal seams during the mining of closely spaced coal seams
机译:Method of Rigid Overlying Strata Failure Assessment of Extracted Seams and its Practical Application / Metoda Hodnocení Porušování Pevného Nadloží Exploatovaných Slojí A Její Praktické Využití
机译:Saint Petersburg Mining University Researchers Update Knowledge of Mining Engineering Development of resource-saving technology for excavation of flat-lying coal seams with tight roof rocks (on the example of the Quang Ninh coal basin mines)
机译:结构调整对波兰采煤业自然危害状况的影响Effect of the Restructuring of the Polish Coal-Mining Industry on the Level of Natural Hazards
机译:主要运输层下的煤层开采/podpatrovéDobýváníUhelnýchsloví