| Annotation |
A brief geological characteristic of Novo-Sorokinsky gold-polymetallic deposits is given. The main ore bodies are steeply dipping with a capacity within...4,0 30,0 m; rock and are ore stable. The development of the field is a system of sublevel drifts with a height equal to the floor height of 50 m. The horizon of the production and delivery of ore is presented by ore-in-take funnels, draw points and scraper drift. The labor productivity of workers does not exceed 20 t/person-shift. The system of sublevel drifts with a height equal to twice the height of the base unit (100 m) on the basis of application on sewage works complex self-propelled machines is proposed. The main objectives of transition to a new variant system of sublevel drifts are discussed: development of a new design system of sublevel drifts; study of increased block height effect on the bearing capacity of inter-chamber pillars; justification for the loss of ore, when mining blocks with the increased height; study of the height of the block influence on the amount of preparatory and rifled workings; research opportunities to improve the quality of the rock mass delivered from a block. The conclusion is made: increasing the height of the unit, up to the double-height base unit (of floor), when the system of sublevel drifts is used allows to eliminate one of the intermediate pillar, which results in the reduction of ore losses, reducing the volume of preparatory-threaded openings, increasing the concentration of mining operations, averaging the content of useful components in the ore mass within the block, but requires a new system design, which makes it possible to maintain the carrying capacity inter-chamber pillars and use a set of self-propelled machines for cleaning the recess |
| References |
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