| 摘要 |
FIELD: mining, particularly geotechnologic solid mineral mining. ^ SUBSTANCE: method involves exposing ore body with central and peripheral boreholes and excavating material in two stages. Central and peripheral boreholes are sunk across ore body strike and are provided with side holes diverging from boreholes at different levels along ore body width and strike. The holes are arranged in staggered order between levels and boreholes and extend in opposite directions. The first material excavation stage is performed simultaneously with borehole and side hole sinking along with face vibration exciting. The second material excavation stage is carried out by material pulp lifting through boreholes, wherein borehole purposes are serially changed, for example, the central borehole is used as production borehole and peripheral ones are injection boreholes and vice-versa. ^ EFFECT: increased efficiency of mineral extraction from ore body formed by monolithic solid rock, increased ore body permeability due to possibility of ore body penetration with boreholes in three dimensions and possibility to create hydraulically communicated hole and crack system between boreholes. ^ 2 dwg |
