兖州矿业(集团)公司北宿煤矿根据施工实践,总结出掘进锚喷中喷头、喷嘴与喷射效果的关系。①工作风压。当喷头工作风压<0.04MPa时,料束出喷头后呈平抛运动,此时混凝土会产生大量回弹物,并在喷射过程中管 Based on the construction practice, North Lake Coal Mine of Yanzhou Mining (Group) Co., Ltd. concluded the relationship between the nozzle and the nozzle and the spray effect in the tunneling and bolting. ① working pressure. When the working pressure of the nozzle is less than 0.04MPa, the material beam will be flattened and throw after the nozzle, at this time, the concrete will produce a large amount of rebound, and in the process of spraying