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METHOD OF OPENING OF MINE HORIZONS FROM DEEP OPENPITS IN MINING OF KIMBERLITE DEPOSITS
METHOD OF OPENING OF MINE HORIZONS FROM DEEP OPENPITS IN MINING OF KIMBERLITE DEPOSITS
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机译：金伯利岩矿床深部露天矿开矿方法
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摘要
FIELD: mining, particularly, methods of opening and sinking of shafts in underground mining of deposits. SUBSTANCE: method involves excavation of openpit by benches; driving of horizontal workings from benches through intervals of 30-100 m for routes of main and auxiliary shafts; expansion of horizontal workings to sizes of drill chambers; drilling of sets of deep boreholes in shaft section through entire depth of interval; leaving of pillar above one part of drill chambers; making draw hole in center of pillar with its upper part formed in draw funnel for entire cross-section of shaft; breakage of rock by explosive blasting, drawing it and its transportation to openpit; lining of shafts. On the last bench of openpit, driven from horizontal working are chambers, and equipment is mounted for sinking of auxiliary blind shaft. It is sunk down to the first underground horizon and connection is made for route of main shaft. Chamber is drilled for drilling-out by boreholes of main shaft of underlaying underground horizon. After unloading of rock from main shaft, blind shaft is sunk down to next underground horizon. Equipment is mounted for operation of auxiliary shaft through entire depth. EFFECT: reduced labor input in sinking and driving; reduced construction terms. 6 dwg
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