Application Research on the Technology of Retaining Roadway Without Coal Pillars Along the Goaf of Underground Composite Roof
In order to solve the problems of low efficiency and high cost of fully mechanized mining under the condition of thick coal seam composite roof in 8292 working face of Taitou Coal and Coke Co.,Ltd.,the technology of gob side entry retaining without coal pillar under the condition of thick coal seam composite roof was proposed for the first time.Special technical improvements have been made to the setting of roof cutting holes and the layout structure of charges under special terrain conditions,as well as the classification and reinforcement support structure,and the constant resistance large anchor cable reinforcement structure,ensuring the reliability of application under special geological conditions.At present,this technology has been applied in Taitou Coal and Coke Co.,Ltd.and has achieved good economic and social benefits.
composite roof panelno coal pillarleaving alleys along the empty space
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