Abstract: Abstract:In view of the problems of excessive mixing and excessive drilling in the on-site anchor bolt construction of coal mine, the anchoring force is tested through the pull-out test, and the splitting device is cut open to observe the anchoring state. Taking the anchoring force and anchoring state as the measurement index of anchoring quality, the comparison test is carried out on the two on-site design and construction factors of mixing time and annular thickness affecting the anchoring quality of anchoring agent, The influence of two factors on anchorage quality is analyzed, and some suggestions for on-site construction are put forward. The results show that when the medium speed anchoring agent is used and the length of the anchoring section is 125mm, the anchoring agent can be fully stirred in a short time to obtain the ideal anchoring quality; When the annular thickness of the anchoring agent is 2 ~ 3mm, the anchoring quality is good and stable. With the increase of the annular thickness of the anchoring agent, the drawing force decreases obviously and the anchoring quality fluctuates greatly.