YUAN R F, CHEN L F, ZHANG Z G,et al.Experimental study and predictive model for the cutting capability and cutting depth of slurry abrasive water jet[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(6):11-18.

doi:10.16186/j.cnki.1673-9787.2021100004

Received:2021/10/04

Revised:2021/11/16

Published:2023/11/25

Experimental study and predictive model for the cutting capability and cutting depth of slurry abrasive water jet

YUAN Ruifu1,2, CHEN Lifeng1, ZHANG Zhigang1, YAO Yuanhang1, WU Junjie1

1.School of Energy Science and Engineering，Henan Polytechnic University，Jiaozuo  454000，Henan，China;2.State Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency Utilization，Henan Polytechnic University，Jiaozuo  454000，Henan，China

Abstract:To enhance the cutting capabilities of slurry abrasive water jets，concrete and rock cutting experiments were conducted using custom-developed slurry abrasive and cutting equipment.The study analyzed the impact of cutting pressure，nozzle movement speed，and material’s uniaxial compressive strength on cutting performance.The results showed that，under identical conditions，slurry abrasive water jets significantly outperform pure water jets in terms of cutting depth，with a more pronounced advantage on materials with higher strength.The cutting ability of the slurry abrasive water jet effectively cut medium-hard sandstone（such as cutting slots with 100 mm depth and 10 m length in 0.5~1.0 hours），and was applied to on-site mining engineering tasks in coal mines，including relieving roof strata pressure，creating roadway retention，and processing gangue in working faces.Prolonged jet nozzle impact at the same cutting location increased the “water cushion” effect，resulting in higher efficiency for multiple quick repeated cuts compared to single slow cuts within the same timeframe.Analyzing the cutting experiment results，a predictive model for cutting depth was developed based on cutting pressure，nozzle moving speed and uniaxial compressive strength of material.Additionally，a cutting depth prediction model for repeated cuts，considering the number of cutting cycles，was derived from this base model.

Key words:slurry abrasive water jet;cutting ability;repeated cutting;cutting depth;prediction model

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