为缓解金川龙首矿棒磨砂产量不足和充填成本上升带来的压力，提升充填体的稳定性，对金川龙首矿棒磨砂、废石混合粗骨料与固结粉的充填特性进行了研究。选择-5 mm棒磨砂和-12 mm废石混合新型固结粉作为充填材料，在灰砂比为1∶4的基础上，开展充填体强度测试和浆体流变性、流动性及泌水率试验，分析混合骨料配比对其充填综合性能的影响规律，从而提出最佳配比参数。结果表明：随着废石掺量的增加，充填体3 d强度出现略微下降，7 d和28 d强度呈现小幅增长的趋势；浆体屈服应力随废石掺量的增加而增大，黏度系数不断减小，当废石掺量小于35%时，浆体屈服应力均小于150 Pa；充填浆体塌落度和扩展度随废石掺量的增加而急剧减小，塌落度为27~29 cm，能够满足自流输送的要求；浆体泌水率为9%~12%，随着废石掺量的增加泌水率减少，有利于提升浆体的抗离析性；混合粗骨料中废石最佳掺量为30%，最佳质量浓度为82%~83%，在该参数条件下充填体各项指标均能满足金川龙首矿充填质量标准，对于提升矿区充填体稳定性和降低充填成本具有重要意义。

The downword drift cemented filling method is an effective way for mining thick，broken，high-grade deposits in Jinchuan mining area.However，it not only has complicated process and high cost，but also requires high quality of filling body.In order to alleviate the pressure caused by insufficient rod milling sand production capacity and increase of produciton cost in Jinchuan mining area，and improve the comprehensive performance of filling body，the mechanical test of the filling body and the rheological properties，fluidity and bleeding rate test of the slurry were carried out，based on cement-sand ratio of 1∶4，using -5 mm rod mill sand，-12 mm waste rock as aggregate，the new consolidation powder as cementitious material.The influence of waste rock and rod milling sand ratio on the strength characteristics，fluidity，rheology and bleeding characteristics of filling body were studied，and the optimal ratio parameters were proposed. The results show that the 3 d strength of filling body decreases slightly，and the 7 d and 28 d strength increased slightly with the increase of the waste rock content.The yield stress of the slurry increase with the increase of waste rock content，and the viscosity coefficient decreases significantly.When the content of waste rock is less than 35%，the yield stress of slurry is less than 150 Pa.The slump and diffusivity degree decrease sharply with the increase of the waste rock content. The slump degree is generally between 27~29 cm，which can meet the requirements of gravity transportation.The bleeding rate of the slurry is 9%~12%.With the increase of waste rock content，the bleeding rate decreases，which is beneficial to improve the segregation resistance of the slurry.According to the test results，the optimal dosage of waste rock in the mixed coarse aggregate is 30%，and the optimal mass concentration is 82%~83%. Under the condition of these parameters，the indexes of filling body can meet the filling quality standard of Jinchuan mining area，which has great significance and application potential to improve the stability of filling body and reduce the cost of Jinchuan mining area.