Purpose. Developing effective mining technologies of working with a roof fall of ore and adjacent strata for deposits of Kryvyi Rih iron ore basin. Methodology. Mining-and-geological and design data of thick steep deposits of Kryvyi Rih iron ore basin are analyzed. Initial data for choosing mining methods for mineral deposits are established. Variants of mining technologies with scraping, rock ore drilling out by parallel fans of deep wells with formation of a vertical compensatory chamber in across and along the strike of a deposit are developed. The basic technical parameters of mining methods are substantiated including a level interval; height of an extraction of a sublevel; length of the block; distance from slusher drifts to developments of inset horizon; distance between final developments. Efficiency of application of the vertical concentrated charges at mines of Kryvyi Rih is proved. Findings. The variant of caving system of ore and adjacent strata with downhole breaking of ore or combined by wells from drilling chambers and the vertical concentrated charges from a lying wall of a deposit is offered. Calculations of parameters of drilling-and-blasting for ore breaking by the vertical concentrated charges are performed. Parameters of breaking and the vertical concentrated charges are received. Originality. Scientific novelty of the offered technology of mining with a roof fall of ore and adjacent strata consists in a substantiation of basic formulas of drilling-and-blasting. Practical value. Effective engineering methods for working of deposits are developed. Calculation methods for parameters of drilling-and-blasting for working of reserves of ore which contact to a lying wall of steep deposits are developed.

 Наукова періодика України 

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