| 摘要 |
FIELD: mining industry, especially for deft and engineering structure building, particularly in permafrost areas. ^ SUBSTANCE: method involves sucking contaminated air after explosion works realization by two venting systems up to obtaining predetermined level of air pollution in bottomhole formation zone; creating circulation air flows in each stagnation zone thereof for contaminants movement to venting system. Circulation air flows are created by feeding several air jets through another venting system which pumps fresh air from atmosphere. Air venting process is carried out up to obtaining air freshness prescribed by sanitary code. ^ EFFECT: increased venting intensity, reduced cost. ^ 2 dwg, 1 ex |
