As an important part of bolt support system, the performance of bolt tray directly affects the support effect of bolt. The role of the tray is to transfer the thrust produced by the nut locking moment to the top side to produce the initial anchor force, and at the same time to transfer the pressure of the top side of the roadway to the anchor rod, to produce working resistance, to strengthen the surrounding rock together, and to prevent the displacement of the top side of the roadway.

Therefore, in selecting the tray, one is to meet the anchor tray and bolt body in the strength of the match, to avoid because the strength of the anchor tray is not enough to cause bolt perforation phenomenon. Second, it is necessary to meet the matching of bolt tray and bolt body in support structure, so as to avoid the uneven force between bolt body and nut caused by the mismatch of bolt body and tray in supporting structure, which will affect the support effect of roadway.