STUDY OF RE-EXTRACTION OF ORES FROM MCC WITH FIELD PREPARATION IN CONDITIONS OF THE COLLAPSE AREA

Justification of the technology for repeated ore extraction from deposits with preparation in complex mining and geological conditions of collapsed zones and subsidence troughs based on a rating indicator. To address the set tasks, theoretical and experimental studies were conducted to analyze the stages and sequence of developing remaining reserves, as well as methods for substantiating geomechanical parameters and assessing the value of mineral resources. Based on these studies, technological schemes were proposed to enable efficient repeated extraction of ore reserves from pillars with preliminary field preparation and determination of the order of development for specific sections. The first to be developed is block 54, followed by blocks 22-23-24, blocks 15 and 15-15 south in areas with overlapping deposits, and finally block 7bis of the "Annenskaya" mine (VGR). Technical and economic calculations confirmed the feasibility of extracting ore reserves from these blocks, despite the challenging conditions of collapsed zones and subsidence troughs.