FIELD: mining industry. SUBSTANCE: method involves introducing sulfur-free zone into working through low-permeable thin seams. After the depression funnel has approached the hydrogen sulfide-containing zone, said zone is introduced into working through low-permeable thin seams. Both zones are worked until weighted mean formation pressure therein becomes equalized. The production opencast mine is shot in all production holes and production is continued in both zones in proportion with the remaining reserves. EFFECT: higher efficiency. 2 dwg
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Authors
Dates
1994-06-15—Published
1991-12-20—Filed