Research status and prospects of paste pipeline transportation technology
WU Aixiang
WANG Zhenqi
CHANG Yingjie
RUAN Zhu'en
WANG Jiandong
Abstract：Cemented paste backfill(CPB)technology,serving as a foundational support for green mining,enables the effi-cient utilization of tailings and other solid wastes while controlling underground pressure and reducing environmental pol-lution.It has become a critical method for deep metal mining operations.The CPB pipeline transportation system,acting as the vital link between the surface and underground stopes,has become a major research focus in recent years.The sta-bility,safety,and intelligence of this system directly determine the effectiveness of the backfilling process.The current re-search status of CPB pipeline transportation technology has been systematically reviewed.At the level of fundamental characteristics,it delves into the rheological behavior of CPB slurry(a high-concentration non-Newtonian fluid),elucidat-ing the influence mechanisms of concentration,particle size distribution,temperature,and additives on shear yield stress and thixotropy.Diverse testing methods,including L-pipe tests,loop tests,and Electrical Resistance Rheography(ERR),are employed to evaluate pipeline resistance.In terms of theory and modelling,it summarizes modified Herschel-Bulkley resistance models,particle migration theory,and pipeline wear prediction methods.It emphasizes the critical role of wall slip effects,particle radial migration,and structural time-dependence on pressure drop and wear.Regarding engineering applications,it analyzes optimization strategies for vertical borehole full-pipe flow control technology,gravity flow,high-pressure pumping,and relay pumping for long-distance transportation.It also reviews advancements in core technologies such as air-water coupling pipeline flushing and intelligent pressure monitoring.The research identifies current challenges,including insufficient adaptability for ultra-long-distance transportation in deep mines,complexity in rheological control of multi-source solid wastes,weaknesses in intelligent operation and maintenance,and bottlenecks in the localization of key equipment.Future development trends will focus on digital twin-driven intelligent perception and control systems,green and low-carbon transportation technologies,modular design standard systems,multidisciplinary integration and innova-tion combining rheology,materials science,and control theory.These advancements will provide theoretical support for the safe,efficient,and environmentally sound operation of CPB pipeline systems,thereby boosting the sustainable devel-opment of mining.
Keywords：cemented paste backfillpipeline transportationgreen miningrheological behaviornumerical simulationintelligent control
Publication Date：2025-09-30
Online Publishing Date：2025-09-30(First online date of this platform, not the publication date of the document)
Pages：15( 1-15 )