Abstract: With the promotion of small coal pillar mining technology, the mining pressure along the gob-side entry is increasingly affected by the dynamic pressure of mining, and the degree of deformation of the coal support is large. The cracks in the surrounding rock of the coal rock mass are developed, and there are technical problems such as irregular drilling formation, difficult hole sealing, and easy failure of the anchor cable anchoring section. In order to effectively solve the problem of soft broken coal support anchor cable support, an injection type sealing plug suitable for sealing irregular anchor cable holes has been developed. Through a combination of theoretical analysis, laboratory experiments, on-site industrial tests, and mining pressure monitoring, the mechanism of injection type hole sealing, high-pressure grouting effect, and anchor cable anchoring performance are analyzed. The results show that the drilling of soft broken coal is irregular, the hole wall is uneven, and the ordinary grouting anchor cable sealing structure is difficult to efficiently seal the annular space of the free section of the anchor cable hole. An injection type sealing integrated structure for soft broken coal anchor drilling is proposed, and its sealing mechanism and construction process are explained. It has the characteristics of simple sealing process and good sealing effect, and the mechanical relationship between grouting pressure in the sealing section of regular and irregular drilling is derived; Based on material ratio tests, the optimal ratio of sealing materials and grouting materials is determined. The relationship table between the length of different sealing sections and the volume of injected sealing materials and the extreme value of grouting pressure is determined through sealing material filling tests and high-pressure water injection tests, providing technical guidance for the design of sealing section length and grouting parameters for soft rock anchor cable holes. In response to the technical difficulties of the overall weakness and fragmentation of the surrounding rock of the small coal pillar in the fault zone of gob-side entry 33132 of the mine, and the easy detachment and failure of the anchor rod, two anchor injection combined reinforcement schemes are proposed: anchoring before grouting support schemes and grouting before anchoring support schemes. The anchoring before grouting support schemes effectively seal the irregular boreholes in the shallow part of the anchor cable, and achieve the full length anchoring of the anchor cable and the reinforcement of the surrounding rock in the anchoring zone through high-pressure grouting in the annular space of the free section of the anchor cable. The anchoring force of the anchor cable is significantly improved, and the pass rate of the anchor cable pull-out test is increased by 55%. The deformation of the surrounding rock is reduced by 48.2%, effectively. The above research results indicate that the injection type sealing and injection integrated plug and its construction technology can significantly improve the shallow sealing efficiency of irregular anchor holes in soft broken coal support, achieve full length anchoring of soft broken coal support anchor cables and reinforcement of surrounding rock in the anchored influence zone, and enhance the control effect of surrounding rock in soft coal support along gob-side entry.