FIELD: mining. SUBSTANCE: subject to measurement is gas volume liberated into working for the ten last minutes of combine operation, and volume of gas liberated for the first ten minutes after completion of operation, and parameter H of outburst hazard is determined. Outburst hazard is estimated by comparison with critical value 0.8. When Hn exceeds 0.8, the state of rock mass is considered safe, and when Hn ≅ 0,8 is equal to, or exceeds 0.8, it is considered outburst-prone. EFFECT: higher efficiency. 2 cl, 1 tbl
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| 0 |
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