Abstract: According to the specific situations of the roadway surrounding rock broken of 2319 fully mechanized caving face of Chengzhuang coal mine of Jincheng coal mining group,the broken reasons and scopes are analyzed,the 2ZBQ type pneumatic grouting pump is adopted to conduct grouting reinforcement on the two sides of 23191 roadway.In order to ensure the effects of grouting reinforcement,the hierarchical partitioning grouting technique is adopted to conduct grouting reinforcement that combining with shallow hole low pressure and deep hole high pressure on the shallow and deep of the same borehole,so the process and technology of grouting reinforcement that is appropriate for Chengzhuang coal mine are formed.The observation analysis results of the looking-glasses of borehole and seriflux distribution situations in wall caving coal briquette after grouting show that,the technique proposed in this paper can meet the requirements of grouting reinforcement of the broken surrounding rocks and the good effects are obtained.

Key words: Grouting reinforcement, Hierarchical partitioning grouting, Broken surrounding rocks