Shepel, О. L. та Rymarchuk, B. I. (2020) ABOUT A QUESTION OF A DECREASE OF A ROCK PRESSURE AT AN ORE DRAWING FROM THE BROUGHT DOWN BLOCKS. Resource-saving technologies of raw-material base development in mineral mining and processing. с. 181-197.

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Title in English

ABOUT A QUESTION OF A DECREASE OF A ROCK PRESSURE AT AN ORE DRAWING FROM THE BROUGHT DOWN BLOCKS

English abstract

Purpose. The analysis of researches efficiency of an ore drawing, as basic pro-cess of underground mining operations at mining methods of a sublevel caving of ore and adjacent strata which provide improvement of parameters of an ore drawing is the purpose of the given operation. Methodology. The detailed analysis and researches of domestic experience of re-lease of the brought down ore from panels and the blocks, which actual for present time; analytical researches of process of an ore drawing on all plane of the block at horizontal contact between ore and leaning soils and absence of a strong rock pres-sure on development workings; ore drawing experimental researches in laboratory conditions on models as much as possible approached to real conditions; program methods for processing of results of experiments. Object of research. Law of change of pressure of broken-down rocks on the block bottom is established at mining of thick steeply dipping deposits of the big prodeleting. Research conclusion. The effective way and a preparation order, a location and section of developments are offered. On the basis of the executed laboratory re-searches of an ore drawing in the separate block located the long side an across the strike of a deposit, the size and character of distribution of pressure of broken-down rocks on the bottom basically depends on the sizes of the block along the strike. With increase in the size of the block along the strike increases not only absolute size of pressure, but also non-uniformity of its distribution.

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