METHOD FOR UNDERGROUND MINING OF MINERALS

摘要

The method is applicable in difficult mining conditions such as shaft pillars, combined mining and mining under engineering facilities. It comprises driving a haulage level (3) on a rock, under and sideways to a mining block (1); driving a ventilation level located above the haulage level (3) and over the mining block, where a central stope rise (5) and a second stope rise (6) are risen along the height H of the mining block. The ventilation level (4) is driven from the beginning (1n) of the mining block (1) to an imaginary transverse plane (7) defined by the second stope rise (6). Externally to the mining block is driven an upper incline (8) from the beginning of the ventilation level (4) downward and a lower incline (9) - from the beginning of the haulage level (3) upwards. The routes of the inclines (8, 9) are joined in the imaginary transverse plane (7) on the level approximately half the height H. After driving the upper incline (8) through the cut-off entry into the mining block (1), an upper sill cut (11) is made at the same level. After that, in the direction from the beginning (In) of the mining block to the second stope rise (6) a reinforced concrete pillar (2) is poured into sections to fill the entire length of the upper sill cut (11). It divides the mining block (1) into two parts - upper and lower - and conventional mining operations are carried out.