中南大学学报（自然科学版）2016，Vol.47Issue(11)：3909-3915,7.DOI:10.11817/j.issn.1672-7207.2016.11.038
粗粒级膏体充填材料静动态抗离析性能表征
Static and dynamic anti-segregation property characterization of coarse-grained paste backfill slurry
摘要
Abstract
To characterize the anti-segregation property of coarse-grained paste backfill slurry, two mechanical models were deduced from the force analysis of coarse particles in both static and dynamic slurry based on the solid-liquid two phase fluid mechanics and the non-Newtonian fluid mechanics. After considering the yield stress of paste slurry, grain size distribution of coarse particles and density of both the solid and liquid, an indexM and its formula were developed to characterize the anti-segregation property of coarse-grained paste backfill slurry. To verify this index, nine orthogonal experiments were carried out with the three factors, i.e. slurry concentration, the maximum size of coarse particles and the tailing-gravel ratio, and fitting analysis of the results were conducted. The results show that the predicted outcomes of anti-segregation indexM are consistent with the actual results. Specifically, the fitting multiple correlation parameters of Mmax andMavg both exceed 0.9, thus the model ofM is tested to be reliable. The anti-segregation property of coarse-grained paste backfill slurry can be predicted accurately with the index ofM if the coarse particle size is suitable. Besides, the recommended value of indexMavg is 1.0 to 2.5 and indexMmax is 1.0 to 1.2.关键词
膏体充填/抗离析指标/剪切阻力/屈服应力/振动离析率Key words
paste backfill/anti-segregation index/shearing resistance/yield stress/vibrational segregation rate分类
矿业与冶金引用本文复制引用
李红,吴爱祥,王洪江,彭乃兵,王恒,焦华喆..粗粒级膏体充填材料静动态抗离析性能表征[J].中南大学学报（自然科学版）,2016,47(11):3909-3915,7.基金项目
国家自然科学基金资助项目(51374034，51304011，51374035)；国家“十二五”科技支撑计划项目(2012BAB08B02)(Projects(51374034,51304011,51374035) supported by the National Natural Science Foundation of China （51374034，51304011，51374035）
Project(2012BAB08B02) supported by the National "Twelfth Five-Year" Plan for Science & Technology of China) （2012BAB08B02）
