分级尾砂充填料浆L管实验及阻力特性研究
Experimental and Resistance Characterization Study of Yransparent L-tube for Graded Tailing Backfill Slurry
汪统科 1王林奇 2杨鹏 1于少峰 3刘伟 1李健 2曹晨 2王勇2
作者信息
- 1. 巴彦淖尔西部矿业有限公司,内蒙古 巴彦淖尔 015500
- 2. 北京科技大学 土木与资源工程学院,北京 100083
- 3. 西部矿业集团公司,青海 西宁 810001
- 折叠
摘要
管道输送阻力是充填料浆管道输送的一个重要参数,目前普遍采用基于宾汉流变模型推导的白金汉公式进行计算,而管壁滑移效应的影响在该公式中被忽略,导致管道输送阻力的计算产生一定的偏差.因此本文基于L管输送实验,提出了考虑管壁滑移效应影响的充填料浆输送阻力计算方法,采用全面实验设计方案,研究了料浆质量分数、灰砂比和管壁滑移效应对于充填料浆管输阻力的影响.结果表明:管输阻力与质量分数、灰砂比呈正相关,与管壁滑移效应呈负相关.管壁滑移效应通过滑移贡献率来量化,该系数受质量分数的影响较明显,随着质量分数增大逐渐减弱,在质量分数较小时,受灰砂比的影响不明显.通过回归分析,构建了基于管径、流速、质量分数、灰砂比四变量,考虑管壁滑移效应的充填料浆管输阻力数学模型,并进行了工程实践验证.
Abstract
Pipe transport resistance is an important parameter of backfill slurry for pipeline transport,and the Buckingham formula based on Bingham's rheological model is commonly used for calculation,and the influence of pipe wall slip effect is ignored in the formula,leads to produce certain deviation pipeline resistance calculation.So this paper proposes a method for calculating the rheological parameters of filling slurry and transport resistance considering the influence of pipe wall slip effect based on the transparent L-pipe conveying experiments,and adopts a comprehensive experimental design scheme to study the effect of slurry mass fraction,cement-tailing ratio on pipe wall slip effect and backfill slurry pipe transport resistance.Using a comprehensive experimental design scheme,the influence of slurry mass fraction and gray-to-sand ratio on the wall slip effect and filling slurry conveying resistance was investigated.The results show that pipe transport resistance is positively correlated with mass fraction and lime sand ratio,and negatively correlated with pipe wall slip effect.The slippage effect is quantified by the slippage contribution degree,which is significantly affected by the mass fraction and gradually decreases with the increase of the mass fraction.When the mass fraction is small,the influence of the lime sand ratio is not obvious.Through regression analysis,a mathematical model of backfill slurry pipe transport resistance was constructed based on the four variables of pipe diameter,flow rate,mass fraction,and cement-tailing ratio,taking into account the wall-slip effect,which is convenient for guiding the engineering practice.
关键词
充填料浆/L管实验/管输阻力/壁面滑移/阻力模型Key words
backfill slurry/l tube experiment/pipeline resistance/wall slip/resistance model引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据