| 摘要 |
FIELD: mining. ^ SUBSTANCE: method consists in dividing section of deposit to columns, in mining excavation of columns along pitch under protection of production faces with roofs of special design (shield) lowered, following mining face advance, in constructing "wall in soil" at border between mined and subject to mining columns; notably, this wall replaces between-column pillars of mineral, in laying metal mesh on bottom of pit above worked out column, in supplying rock, produced at open excavation, through mesh into course; also local binding material is added to rock. ^ EFFECT: elimination of losses and dilution of mineral and improvement of control over shield due to combined backfilling of course. |
