Mechanical Properties Test of Resin Anchoring Agent Combination with Different Rates

To determine the appropriate combination ratio of resin anchoring agents at different rates to ensure the rapid tunneling speed and quality of modern mine coal roadway. The calculation model of bolt pull-out test was established by FLAC^3D. Through the assignment of anchoring strength parameters at different time, the growth of bolt pull-out force with different ratios of resin anchoring agent at different combination ratios was simulated. The results show that the first 30 minutes is the main time period of the pull-out force growth, and then the growth rate is relatively flat; with the increase of time, the difference of the pull-out force of anchoring agent is gradually reduced under different combination ratios, and the difference is mainly concentrated within the first 20 minutes; during the pull-out growth period, the bolt pull-out force is the largest and the pull-out force growth rate is the slowest when the fast and medium-speed resin anchoring agent is combined in 3∶2 ratio, which can effectively solve the contradiction between the quality and speed of the bolt support, which is the most suitable combination ratio.