Research and application of a new type of weatherproof spraying material for bed plate roadway

In view of the shortcomings of traditional shotcrete in preventing roadway weathering, a new type of spraying material is studied based on the engineering background of bed plate roadway of Changping Mine. Through the experiment, the material composition, reasonable proportion and mechanical properties are obtained, and the underground test is carried out. The experimental results show that the A-component of spraying material is ASX02 water-based resin, the main raw material of B-component powder is BSN02, the optimal mix ratio of A and B is 1∶1, and the maximum deformation rate of the panel can be increased by 7 to 8 times covered by sprayed material. The underground test shows that the appearance quality of spraying layer is good, the optimal thickness of spraying is 8 mm or 10 mm, the deformation of roadway is significantly reduced after spraying, the rebound of construction is small, there is no dust, and the spray footage of single shift can be 20 m to 30 m.