STUDY OF THE STABILITY OF PREPARATORY WORKINGS SECURED WITH ANCHORAGE, THOSE WHO FIND THEMSELVES IN DIFFICULT EMERGENCY SITUATIONS WHEN WORKING OUT COAL SEAMS AT THE MINES OF KUZBASS | Zendy

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STUDY OF THE STABILITY OF PREPARATORY WORKINGS SECURED WITH ANCHORAGE, THOSE WHO FIND THEMSELVES IN DIFFICULT EMERGENCY SITUATIONS WHEN WORKING OUT COAL SEAMS AT THE MINES OF KUZBASS

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