Determination of optimal block length along the strike to provide safety and efficiency when extracting medium-thick in-clined coal seams using room-and-pillar method in Quang Ninh coal basin

Determination of optimal block length along the strike to provide safety and efficiency when extracting medium-thick in-clined coal seams using room-and-pillar method in Quang Ninh coal basin

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WARNING SHOT CITRUS An analysis of appropriateness of room-and-pillar method for extracting medium-thick inclined coal seams in Quang Ninh Coal Basin taking into account existing mining and geological conditions was carried out.Corresponding foreign experience of applying room-and-pillar method was considered in relation to the mines of Vietnam.Process flow sheet of first mining and extraction of medium-thick inclined coal seams by room-and-pillar method in complicated mining and geological conditions was 4 Piece Outdoor Seating developed, and optimal block length along the strike to provide the production safety and efficiency was determined.