To recover chain pillars in longwall tailgate entries, a supplemental support trial with cuttable pumpable cribs in crosscuts and intersections area parallel to longwall 22311 was conducted at mine A. According to the support parameters of the abandoned entry, the load of the pumpable cribs under the worst condition has been solved; according to the design strength of the pumpable cribs while considering its structural size effect, the bearing capacity of the single pumpable crib has been solved; and the arrangement of the pumpabl is determined according to the number of them required for the single abandoned entry and the mining law of longwall. During the process of safely mining through and pillar recovery, the pressure and convergence monitoring results from the initial design and areas with cuttable them indicated that the mine pressure is large in parallel to the abandoned entry section of the longwall; the intersections should be the major areas to be supported, and the closer to the middle of the longwall, the greater the abutment pressure developed in the crosscuts. In skew or vertical to abandoned entry with longwall, under bolt and cable reinforcement and support, pumpable cribs can not be carried out. The convergence of the entry supported with pumpable cribs was found very small, which meets the requirements of chain pillar recovery as working face passing through the abandoned entry. According to the results, the support parameters of pumpable cribs have been optimized. Considering the secondary reinforcement and a certain weakening factor of cable bolts, the pumpable crib parameters have been optimized and deployed for later applications in these crosscuts. The field results indicated that, during the mining process, The roof had no severe sag with optimized pumpable cribs, and the pillars had been safely recovered with lower supplemental support cost.