COAL MINE UNDERGROUND RESERVOIR ARTIFICIAL RETAINING DAM AND SAFETY COAL PILLAR, SURROUNDING ROCK AND RETAINING DAM CONNECTION METHOD Russian patent published in 2017 - IPC E02B3/10 E02B7/12 E21F17/00 

FIELD: mining.

SUBSTANCE: present invention presents coal mine underground reservoir artificial retaining dam. Artificial retaining dam 30 is embedded into safety coal pillar 2 and surrounding rock around auxiliary strett 1. Artificial retaining dam 30 cross-section has shape of arch, and artificial retaining dam 30 concaved section in form of arch faces underground reservoir. Coal mine underground reservoir artificial retaining dam 30 connection method with safety coal pillars 2 and surrounding rocks includes steps of: selection of artificial retaining dam 30 fencing sections between safety coal pillars 2 in auxiliary strett 1; performing of artificial retaining dam 30 with cross-sections in form of arc, which concave section faces underground reservoir; cuttings in safety coal pillars 2 and surrounding rocks around auxiliary strett 1 to form recesses 32; in recesses 32, introduction of plurality of screws into safety coal pillars 2 and surrounding rocks and cement output under high pressure to form artificial retaining dam 30 in recesses 32. Retaining dam improves artificial retaining dam resistance on sliding and can be effectively alleviate impact effect on dam bodies as a result of sudden increase in water pressure.

EFFECT: improved connection between artificial retaining dam, safety coal pillar and surrounding rock.

7 cl, 3 dwg