(1. 北京科技大學(xué) 土木與資源工程學(xué)院，北京 100083；
2. 北京科技大學(xué) 金屬礦山高效開采與安全教育部重點實驗室，北京 100083；
3. 中國恩菲工程技術(shù)有限公司 礦山事業(yè)部，北京 100038)
摘 要: 針對礦山充填料漿高濃度易堵管、低濃度采場積水問題，開展廢石尾砂充填料漿的強度特性和流動特性試驗研究。基于不同充填配比的強度、塌落度、擴展度和流變參數(shù)，構(gòu)建了強度參數(shù)、流動參數(shù)和充填材料成本數(shù)學(xué)模型。結(jié)果表明：充填體強度、料漿塌落度和擴展度隨含水量增大而增大，料漿屈服應(yīng)力和塑性黏度隨含水量增大而減小。強度模型求解的達標(biāo)含水量為20.5%~26.0%，3 d、7 d和28 d的最小強度分別為1.58 MPa、2.50 MPa和5.20 MPa；流動模型求解的達標(biāo)含水量為22.0%~26.0%，塌落度和擴展度的最小值分別為25.64 cm和44.37 cm，屈服應(yīng)力和塑性黏度的最大值分別為206.7853 Pa和0.7894 Pa·s。優(yōu)化的材料成本為244.84元/m3，充填體中的的廢石、全尾砂、水泥和水用量分別為0.6535 t/m3、0.6535 t/m3、0.3268 t/m3和0.5663 t/m3，建議充填輸送料漿含水量為25.74%。
關(guān)鍵字: 廢石全尾砂；強度特性；流動特性；含水平衡；成本優(yōu)化
（1. School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing, Beijing 100083, China;
3. Mine Division, China ENFI Engineering Corp., Beijing 100038, China）
Abstract:For the problem of "high-concentration slurry is prone to blockage accidents, and high-water-content slurry is prone to segregation accidents", the strength characteristics test and slurry flow characteristics test of waste rock and unclassified tailings backfill were carried out. Based on the strength, slump, expansion and rheological parameters of different filling ratios, the mathematical models of strength parameters, flow parameters and filling material cost were constructed. The results show that the strength of the filling body, the degree of slump and the degree of expansion of the slurry increase with the increase of the water content, and the yield stress and the plastic viscosity of the slurry decrease with the increase of the water. The suitable water content range for the solution of the strength model is 20.5%-26.0%, and the intensity minimums for 3 d is 1.58 MPa, those for 7 d and 28 d are 2.50 MPa and 5.20 MPa, respectively. The reasonable range of water content is 22%-26%, the slump values are all greater than 25.64 cm, the expansion values are all greater than 44.37 cm, the yield stress values are all less than 206.7853 Pa, and the plastic viscosity values are all less than 0.7894 Pa·s at the time. The optimized material cost is 244.84 yuan/m3. The contents of waste rock, unclassified tailings, cement and water inside the backfill are 0.6535 t/m3, 0.6535 t/m3, 0.3268 t/m3, and 0.5663 t/m3. The recommended water content in the slurry is 25.74%.
Key words: waste rock and unclassified tailings; strength properties; flow properties; water balance; cost optimization
