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Abstract Fengfeng Group Xin'an mine -500 level north wing mining area No. 2 coal seam mining face floor water bearing high threat, according to the guiding principle of advanced governance, regional governance, comprehensive renovation, mining under safe water pressure of aquifer, using multi branch directional drilling technology drilling exploration, selection of No. 2 coal seam floor aquifer grouting for the purpose of the transformation, regional exploration - control - inspection technology, achieved the comprehensive transformation of coal seam floor aquifer and safe mining.
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