自流充填系统的管道压力与流量特征研究
Pressure and Flowrate Characteristics of Free Fall Backfill System
李小松 1赵承佑 1秦帅 1肖柏林2
作者信息
- 1. 中色非洲矿业有限公司,基特韦 赞比亚 22592
- 2. 北京科技大学 土木与资源工程学院,北京 100083
- 折叠
摘要
以某高浓度自流充填矿山为例,采用理论分析、室内试验及实测验证相结合的方式,研究了自流充填系统管网参数与阻力特征.结果表明,自流充填系统工序多,正常充填的流量波动范围可达 100～240 m3/h,压力 1.2～2.2 MPa.管道具体点位的流量呈似正态分布,均值为 190 m3/h;压力具有 2 个区间特征峰,分别为 1.86 MPa和 3.04 MPa,单一点位的管道参数不能用于分析与判断堵管、泄漏等工况.管道区间压力差和流量差具有显著的正态分布特征,统计数学期望值分别为 4.62 m3/h和 0.64 MPa,可用瞬时流量差和压力差判断管道堵泄状态.用 Swamee-Aggarwal 公式预测层流-紊流过渡区的管流阻力为 2.08 MPa/km,与实测值2.15 MPa/km相吻合.
Abstract
A free fall backfill(FFB)system with high-concentration slurry in a mine was taken as an example to study pipeline parameters and resistance characteristics of FFB system by conducting theoretical analysis,laboratory test and verification with field measurement.The results show that the FFB system has many working procedures,with flowrate for normal backfilling fluctuating within the range of 100-240 m3/h,and the pressure at 1.2-2.2 MPa.The flowrate at specific points of the pipeline presents a quasi-normal distribution,averaging 190 m3/h.There are two characteristic peaks for the pressure,being 1.86 MPa and 3.04 MPa,respectively.The parameters at a single point of pipeline cannot be used to analyze and judge the working conditions,such as pipe blockage and leakage.The pressure difference and flowrate difference between sections of the pipeline present obvious normal distribution,with mathematical statistics expectations of 4.62 m3/h and 0.64 MPa,respectively.The difference in instantaneous flowrate and pressure can be used to judge blockage and leakage of the pipeline.The flow resistance in the laminar-turbulent transition zone predicted by the Swamee-Aggarwal formula is 2.08 MPa/km,which is consistent with the measured value of 2.15 MPa/km.
关键词
深井充填/自流充填/管道压力/管流阻力/浆体流量/管道输送Key words
deep mine backfill/free fall backfill(FFB)system/pipeline pressure/flow resistance/flowrate of slurry/pipeline transportation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据