Abstract: In order to improve the strength of soft rock floor for large vehicles such as trackless rubbertyred vehicles,combined with the geological conditions of soft rock floor of 16206 machine roadway in Yangchangwan Coal Mine,the slag concrete floor reinforcement technology was studied,the reasonable mix scheme was determined,and the concrete floor was laid in the machine roadway site.The research and application results show that the slag concrete floor strength can meet the needs of continuous transportation of large vehicles,greatly improve the bearing capacity of the floor,prevent floor heave,and provide a basic guarantee for continuous transportation of longdistance roadways.

Key words: Soft rock floor, slag concrete, Reinforcement, Roadway support