高井深膏体充填管道调压满管稳定输送技术研究  

Study on Stable Transportation Technology with Pressure Regulation and Full Pipe in Paste Filling Pipeline for Deep Shaft

作　　者：彭亮 PENG Liang(School of Resources and Safety Engineering,Central South University,Changsha,Hunan 410083,China;Changsha Institute of Mining Research Co.,Ltd.,Changsha,Hunan 410012,China)

机构地区：[1]中南大学资源与安全工程学院,湖南长沙410083 [2]长沙矿山研究院有限责任公司,湖南长沙410012

出　　处：《矿业研究与开发》2022年第10期30-34,共5页Mining Research and Development

基　　金：“十三五”国家重点研发计划项目(2018YFC0604603,2018YFC0604606)。

摘　　要：针对高井深充填系统垂直管道落差大,充填输送管道非满管状态会造成管道内壁的加速磨损与破坏问题,计算分析了垂直管道非满管高度的影响因素,研究了高井深充填垂直管道非满管的形成机理。以安徽某铁矿为研究对象,开展了全尾砂充填料浆配比优化、井下充填输送管道压力监测,并在此基础上提出了充填料浆的流速与压力调控技术。结果表明:(1)垂直高差提供的静压头大于系统输送所需的沿程阻力时,膏体料浆加速导致管内出现负压,从而在管内产生空气柱,流速进一步增快加剧了管道内部的磨损与破坏;(2)已投产管道系统可以通过料浆改性、增加料浆阻力及改变垂直管道直径来提高满管率;(3)沿程阻力随着输送流量呈先减小后增大的趋势,且随着流量的增大,其最低点出现在250~260 m~3/h范围内,建议该矿料浆输送流量范围为250~260 m~3/h;(4)变径管路直径越细则充填竖管的满管率越高,变径管路长度与满管率成正比,直径为30 mm、长度为2 m时,充填竖管的满管率达到87.66%。变径管路在水平管道安装的位置变化对竖管的整体满管率影响较小。Aiming at the problem of accelerated wear and failure of the inner wall of the pipeline under non-full state of the filling pipeline due to the large vertical pipeline drop of the filling system for deep shaft,the influencing factors of the non-full height of the vertical pipeline were calculated and analyzed,and the formation mechanism of the non-full pipe of the vertical filling pipeline for deep shaft was studied.Taking an iron mine in Anhui as the research object,the proportion optimization of full tailings filling slurry and the pressure monitoring of underground filling pipeline were carried out.And on this basis,the flow velocity and pressure regulation technology of filling slurry was proposed.The results are concluded as follows.Firstly,when the static pressure head provided by vertical height difference is greater than the required resistance along the pipeline,the acceleration of paste slurry leads to negative pressure in the pipeline,resulting in air column in the pipeline,and the further increase of flow velocity aggravates the wear and damage inside the pipeline.Secondly,for pipeline system that has been put into production,the full pipe rate can be improved by modifying slurry,increasing slurry resistance and changing vertical pipe diameter.Thirdly,the resistance along the pipeline decreases first and then increases with the conveying flow,and with the increase of the flow,the lowest point appears in the range of 250-260 m~3/h.Thus,it is suggested that the conveying flow range of the filling slurry is about 250-260 m~3/h.Fourthly,the smaller the diameter of the variable-diameter pipe is,the higher the full pipe rate of the vertical pipe is.The length of the variable-diameter pipe is proportional to the full pipe rate.When the pipe diameter is 30 mm and the length is 2 m,the full pipe rate of the vertical pipe reaches 87.66%.The change of the installation position of the variable-diameter pipeline in the horizontal pipeline has little effect on the full pipe rate of the whole vertical pipeline.

关 键 词：高井深 膏体充填 管道输送 满管率 压力调控 沿程阻力 

分 类 号：TD853.34[矿业工程—金属矿开采]