A roof fall accident that was caused by bolt support is analyzed. The influence of the lane fault to bolt (cable) is pointed out. It has a certain reference for support selection of the same lanes.

According to the numerical analysis results, the axial force distribution of bolt have been studied, the differences between bolt for pull test and for supporting have been pointed out.

The application of bolt support in No. 2 seal of Xiyu mine and its spreading is introduced; its benefit and problems are also pointed out.