黏弹性表面活性剂浆体磨料射流破岩综合实验设计  

Experimental design for rock breaking of viscoelastic surfactant slurry abrasive jet

作　　者：李乃良 张一帆[1] 周怀春 LI Nailiang;ZHANG Yifan;ZHOU Huaichun(School of Low-carbon Energy and Power Engineering,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]中国矿业大学低碳能源与动力工程学院,江苏徐州221116

出　　处：《实验技术与管理》2024年第12期38-44,共7页Experimental Technology and Management

基　　金：国家自然科学基金项目(52204251);高等学校能源动力类教学研究与实践项目(NSJZW2021Y-87);中国矿业大学实验技术研究与开发重点项目(S2021D002);中国矿业大学教学研究项目(2024JY056,2023ZDKT04)。

摘　　要：面向“智能掘进”课程实验教学需求,设计了黏弹性表面活性剂(VES)浆体磨料射流破岩综合教学实验。采用“材料制备—性能测试—实验探究”的层次化实验教学方案,从颗粒携带能力、射流形态结构、破碎坑形貌及破岩效率等方面研究VES磨料浆体射流破岩效果,帮助学生掌握高压浆体磨料射流破岩的基本原理和工程应用。该实验将科研成果与实验教学深度融合,涉及煤炭绿色开采、智能采矿和节能降碳等多个学科领域,有助于激发学生的科研兴趣,提升学生的实践创新能力。[Objective]Abrasive water jet(AWJ)technology,which effectively breaks rocks in thin coal seams,faces challenges like nozzle blockage and low cutting efficiency owing to particulate agglomeration and deposition.Recent advancements have shown that adding a viscoelastic surfactant(VES)to an abrasive slurry provides benefits such as low friction,high viscosity,and stable suspension.Inspired by the progress made in the abrasive slurry jet(ASJ),this study designed a comprehensive teaching experiment to investigate the rock-breaking performance of ASJs with VES additives.[Methods]A comprehensive experimental study on rock breaking using VES ASJ was conducted on a high-pressure jet cutting platform.Prior to the experiment,VES was prepared using octadecyl trimethyl ammonium chloride,sodium salicylate(NaSal),and C3H8O in a 1:5:1 mass ratio.SiO2 particles were added to the VES solution at a concentration of 15 kg/m3 to form an abrasive slurry.Stability was assessed through static visual observations,revealing a stable suspension of SiO2 owing to the VES’s three-dimensional entangled network structure of the VES under the action of counter ions.Based on similar material modeling methods,the artificial rock samples used for rock-breaking experiments were made of architectural gypsum,cement,and quartz sand in a 1:4:5 mass ratio.The relationship between the uniaxial compressive stress and loading displacement in both man-made rock samples and natural marble samples exhibited similar trends,indicating that they had comparable mechanical properties.[Results]This study examined the particle-carrying capacity,flow pattern,and rock-breaking ability of ASJs,along with the morphology and size of the resulting rock crushing pits.Experimental results clearly show that the particle-carrying rate of ASJ increases rapidly with jet velocity and is higher with VES additives than with AWJ.This improvement is attributed to the VES’s entangled network structure,formed under the action of counter ions.Owing to the low friction and high visco

关 键 词：智能采矿 综合实验 磨料射流 破岩 

分 类 号：G642.423[文化科学—高等教育学] TD431[文化科学—教育学]