{"title":"Rock breaking using liquid nitrogen and water jet: a case of granite","authors":"Jialiang Liu, Hao Liu, Fangzhen Shi, Yuanhao Zhou, Meng Sun, Siyu Wu, Xiaxin Zhou, Siliang Li","doi":"10.1007/s43452-024-01090-6","DOIUrl":null,"url":null,"abstract":"<div><p>Water jet impact technology has more advantages in environmental protection, safety and quality. This paper innovatively puts forward the new technology of temperature–hydrodynamic coupling effect rock breaking, which can fully utilize the water jet energy and effectively improve the mining and excavation capacity of granite, especially suitable for high-temperature rocks. Taking the common granite in the actual project as an example, the mechanical test and water jet impact test are carried out to study and analyze the temperature–water jet coupling effect. Rock-breaking technology, acoustic emission technology, image recognition technology and nuclear magnetic resonance technology are used to analyze the mechanism of the temperature–water jet coupling effect, supplemented with numerical simulation to verify and analyze. The test results show that: under the action of temperature–hydrodynamic coupling, the granite crushing is more obvious, the degree of influence of liquid nitrogen impact time 120 s > 180 s > 240 s > 300 s > 60 s, and the crushing efficiency is improved by 117%; through numerical simulation to analyze the comprehensive damage factors, the temperature–hydrodynamic coupling effect produces a large number of minor damages in the internal granite; analyzing the stress characteristics of granite. Under the effect of temperature–hydrodynamic coupling, granite is mainly subjected to tensile damage, thus generating cracks to promote granite crushing. The results of the study provide theoretical guidance for practical engineering.</p></div>","PeriodicalId":55474,"journal":{"name":"Archives of Civil and Mechanical Engineering","volume":"25 1","pages":""},"PeriodicalIF":4.4000,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Archives of Civil and Mechanical Engineering","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s43452-024-01090-6","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}
引用次数: 0
Abstract
Water jet impact technology has more advantages in environmental protection, safety and quality. This paper innovatively puts forward the new technology of temperature–hydrodynamic coupling effect rock breaking, which can fully utilize the water jet energy and effectively improve the mining and excavation capacity of granite, especially suitable for high-temperature rocks. Taking the common granite in the actual project as an example, the mechanical test and water jet impact test are carried out to study and analyze the temperature–water jet coupling effect. Rock-breaking technology, acoustic emission technology, image recognition technology and nuclear magnetic resonance technology are used to analyze the mechanism of the temperature–water jet coupling effect, supplemented with numerical simulation to verify and analyze. The test results show that: under the action of temperature–hydrodynamic coupling, the granite crushing is more obvious, the degree of influence of liquid nitrogen impact time 120 s > 180 s > 240 s > 300 s > 60 s, and the crushing efficiency is improved by 117%; through numerical simulation to analyze the comprehensive damage factors, the temperature–hydrodynamic coupling effect produces a large number of minor damages in the internal granite; analyzing the stress characteristics of granite. Under the effect of temperature–hydrodynamic coupling, granite is mainly subjected to tensile damage, thus generating cracks to promote granite crushing. The results of the study provide theoretical guidance for practical engineering.
水射流冲击技术在环保、安全、质量等方面更具优势。本文创新性地提出了温度-水力耦合效应破岩新技术，可充分利用水射流能量，有效提高花岗岩的开采挖掘能力，尤其适用于高温岩石。以实际工程中常见的花岗岩为例，进行力学试验和水射流冲击试验，研究分析温度-水射流耦合效应。采用破岩技术、声发射技术、图像识别技术和核磁共振技术分析温度-水射流耦合效应的机理，并辅以数值模拟进行验证和分析。试验结果表明：在温-水耦合作用下，花岗岩破碎较为明显，液氮冲击时间影响程度120 s > 180 s > 240 s > 300 s > 60 s，破碎效率提高117%；通过数值模拟分析综合损伤因素，温-水耦合效应在花岗岩内部产生大量的微小损伤；分析花岗岩的应力特性。在温度-流体力学耦合作用下，花岗岩主要受到拉伸破坏，从而产生裂纹促进花岗岩破碎。研究结果为实际工程提供了理论指导。
期刊介绍：
Archives of Civil and Mechanical Engineering (ACME) publishes both theoretical and experimental original research articles which explore or exploit new ideas and techniques in three main areas: structural engineering, mechanics of materials and materials science.
The aim of the journal is to advance science related to structural engineering focusing on structures, machines and mechanical systems. The journal also promotes advancement in the area of mechanics of materials, by publishing most recent findings in elasticity, plasticity, rheology, fatigue and fracture mechanics.
The third area the journal is concentrating on is materials science, with emphasis on metals, composites, etc., their structures and properties as well as methods of evaluation.
In addition to research papers, the Editorial Board welcomes state-of-the-art reviews on specialized topics. All such articles have to be sent to the Editor-in-Chief before submission for pre-submission review process. Only articles approved by the Editor-in-Chief in pre-submission process can be submitted to the journal for further processing. Approval in pre-submission stage doesn''t guarantee acceptance for publication as all papers are subject to a regular referee procedure.
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