Abstract: Abstract: This paper studies the anchoring experiment of waterproof anchorage agent used for disposal of floor heave. The withdrawal resistance of waterproof anchorage agent, anchorage force inside of water-bearing anchorage pipe with different aperture, as well as the withdrawal resistance contrast between ordinary anchorage agent and waterproof anchorage agent have been studied by adopting self-made waterproof anchorage agent. The study shows that: the withdrawal resistance of waterproof anchorage agent within water is above 200KN; the anchorage forces of anchor rope within ?45mm and ?50mm anchorage pipes are above 150KN and 110KN respectively; the average value of withdrawal resistance of waterproof anchorage agent within anchorage pipe with 100% water percentage is 196.3KN, the anchoring effect is 2.86 times higher than that of ordinary anchorage agent with 49% water percentage. In the process of using waterproof anchorage agent, should fully follow the principle of “three diameter matching” and the length design of anchorage section, otherwise the anchoring effect will be seriously affected.The new-type waterproof anchoring agent was successfully used on the floor heave section of air return tunnel of 2nd mining area of Jiangjiahe coal mine, it could improve the construction efficiency, shorten the construction period, and reduce the influence on anchoring force of anchor rope reducing caused by water.