Research and practices on floor heave deformation mechanism and support of high stress soft rock roadway in Dayan No.2 Mine

The deformation of mine soft rock roadway was one of the main dangers affected to the mine safety production of the mining area with soft rock.The main factor of the lost stable and deformation in the No.2 level(+250m) high stress soft rock roadway of Dayan No.2 Mine was the floor heave.The paper analyzed the floor heave cause and heave deformation law of the roadway and provided the practical and feasible prevention and control measures.