岩巷掘进快速湿式喷射混凝土支护技术

Rapid Wet Shotcreting Support Technology of Mine Rock Roadway

为在锚喷支护中实现快速喷射混凝土作业,采用理论分析和现场试验的方法,在邢台矿区井下采用岩巷湿式喷射混凝土技术的基础上,通过配套设备和工艺改进,实现了锚喷巷道快速湿式喷射混凝土作业,湿式喷射混凝土速度达30m/d,减少了锚喷巷道施工粉尘浓度,回弹率降低至12.15%,从而改善了作业环境、降低了材料消耗,每米巷道使用喷射混凝土材料1.33m3,且湿式喷射混凝土技术混凝土抗压强度提高了37%,为邢台矿区实现湿式喷射混凝土技术的推广应用提供了理论和实践经验。

In order to realize a rapid shotcreting operation in the bolt and shotcreting support, a theoretical analysis and a site experiment method were applied.Based on the wet shotcreting technology of the mine rock roadway in Xingtai Mining Area,with the improvement on the matched equipment and technique, a rapid wet shotcreting operation in the bolt and shotcreting roadway was realized and the wet shot- creting speed was 30 m/d.The dust content in the bolt and shotcreting operation of the mine roadway was reduced and the rebounding rate was reduced to 12.15%.Thus the operation environment was improved and the material consumption was reduced.The shotcreting material applied was 1.33 m3 per meter of mine roadway.The concrete compressive strength of the wet shotcreting technology was improved by 37% and could provide the theoretical and practical experiences to the promotion and application of the wet shotcreting technology in Xingtai Mining Area.