Practical Application of Pillar Wall Mining Technology Without Coal Pillars along the Empty Space
In the situation where the continuous mining of Wangzhuang coal mine cannot meet the Y-shaped ventilation layout of two entry and one return along the goaf,the large section roadway excavation,pumping roadway side filling,and deep hole blasting pre splitting technology were applied to implement pillar wall excavation along the goaf and pillar wall excavation without coal pillars,achieving good economic benefits.This can provide reference experience for non pillar mining in high mining face under similar conditions.
piers and columnsnon pillar mininglane side support
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