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高压脉冲水射流破岩特性的试验研究

Experimental investigation on rock fragmentation charactersitics of pressurized pulsed water jet.

作者信息

Ling Yuanfei, Wang Xiaoqiang, Tang Jiren, Zhang Yangkai

机构信息

School of Mechatronics Engineering, Henan University of Science and Technology, Luoyang, 471003, China.

Collaborative Innovation Center of Hennan Province for High-End Bearing, Henan University of Science and Technology, Luoyang, 471000, China.

出版信息

Sci Rep. 2025 Jan 2;15(1):232. doi: 10.1038/s41598-024-84194-6.

DOI:10.1038/s41598-024-84194-6
PMID:39748053
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11697444/
Abstract

As a novel type of pulsed water jet (PWJ), the pressurized pulsed water jet (PPWJ) shows great potential in the field of rock fragmentation engineering. In this study, the macro and micro morphologies of erosion craters on different targets (sandstone and granite) were measured to investigate the rock fragmentation characteristics of PPWJ. The results show that the fragmentation processes of granite and sandstone are significantly different from each other. The erosion craters on the sandstone surface exhibit a conical shape, with fragmentation manifesting as the successive exfoliation of mineral particles; the main destruction pattern of sandstone is the fracture of the bonding surfaces between particles. In contrast, the erosion craters on the granite surface assume a spoon-like form, with fragmentation presenting as flake-like exfoliation caused by the expansion of internal fractures; the main destruction pattern of granite is intragranular and intergranular fracture. The erosion volume of granite is much larger than that of sandstone, indicating that PPWJ-induced fragmentation of brittle and hard rock is more likely to form large-volume spalling. Under the same conditions, compared with continuous water jet (CWJ) and interrupted pulsed water jet (IPWJ), the specific energy consumption of rock fragmentation by PPWJ is reduced by 60.2% and 54%, respectively. The results of this study are expected to lay the foundation for promoting the application of PPWJ in rock fragmentation engineering.

摘要

作为一种新型脉冲水射流（PWJ），加压脉冲水射流（PPWJ）在岩石破碎工程领域展现出巨大潜力。在本研究中，测量了不同靶材（砂岩和花岗岩）上冲蚀坑的宏观和微观形态，以研究PPWJ的岩石破碎特性。结果表明，花岗岩和砂岩的破碎过程存在显著差异。砂岩表面的冲蚀坑呈圆锥形，破碎表现为矿物颗粒的连续剥落；砂岩的主要破坏模式是颗粒间结合面的断裂。相比之下，花岗岩表面的冲蚀坑呈勺状，破碎表现为内部裂缝扩展导致的片状剥落；花岗岩的主要破坏模式是晶内和晶间断裂。花岗岩的冲蚀体积远大于砂岩，这表明PPWJ诱导的脆性和硬岩破碎更易形成大体积剥落。在相同条件下，与连续水射流（CWJ）和间歇脉冲水射流（IPWJ）相比，PPWJ破碎岩石的比能耗分别降低了60.2%和54%。本研究结果有望为推动PPWJ在岩石破碎工程中的应用奠定基础。

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本文引用的文献

1
Development of a hydraulically controlled piston-pressurized pulsed water jet device and its application potential for hard rock breaking.
Rev Sci Instrum. 2021 Aug 1;92(8):085101. doi: 10.1063/5.0052853.