On Applicability of Some Indirect Tests for Estimation of Tensile Strength of Anisotropic Rocks

IF 1.1 Q3 MINING & MINERAL PROCESSING

Journal of Mining and Environment Pub Date : 2020-07-01 DOI:10.22044/JME.2020.9220.1813

F. Rastegar, H. Nejati, A. Ghazvinian, M. R. Hadei, A. Nazerigivi

{"title":"On Applicability of Some Indirect Tests for Estimation of Tensile Strength of Anisotropic Rocks","authors":"F. Rastegar, H. Nejati, A. Ghazvinian, M. R. Hadei, A. Nazerigivi","doi":"10.22044/JME.2020.9220.1813","DOIUrl":null,"url":null,"abstract":"The tensile strength of rocks plays a noteworthy role in their failure mechanism, and its determination can be beneficial in optimizing the design of the rock structures. Schistose rocks due to their inherent anisotropy in different foliation directions show a diverse strength at each direction. The purpose of this work was to compare and assess the tensile strength of phyllite, which was obtained in direct and indirect tensile tests in different foliation directions. To this end, several phyllite specimens with different foliation angles (0o, 30o, 45o, 60o, and 90o) related to the loading axis (β) were prepared. Finally, the direct tensile test, diametrical and axial point load tests, Brazilian test, and Schmidt hammer test were conducted on 188 samples. The results of the experimental tests revealed that the maximum and minimum tensile strengths in direct tensile testing tension were directly related to the angles of 0o and 90o. Also it was observed that the Brazilian tensile strength overestimated the tensile strength. Furthermore, an exponential correlation was introduced between the direct tensile strength and the Brazilian tensile strength.","PeriodicalId":45259,"journal":{"name":"Journal of Mining and Environment","volume":null,"pages":null},"PeriodicalIF":1.1000,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Mining and Environment","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.22044/JME.2020.9220.1813","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MINING & MINERAL PROCESSING","Score":null,"Total":0}

引用次数: 0

Abstract

The tensile strength of rocks plays a noteworthy role in their failure mechanism, and its determination can be beneficial in optimizing the design of the rock structures. Schistose rocks due to their inherent anisotropy in different foliation directions show a diverse strength at each direction. The purpose of this work was to compare and assess the tensile strength of phyllite, which was obtained in direct and indirect tensile tests in different foliation directions. To this end, several phyllite specimens with different foliation angles (0o, 30o, 45o, 60o, and 90o) related to the loading axis (β) were prepared. Finally, the direct tensile test, diametrical and axial point load tests, Brazilian test, and Schmidt hammer test were conducted on 188 samples. The results of the experimental tests revealed that the maximum and minimum tensile strengths in direct tensile testing tension were directly related to the angles of 0o and 90o. Also it was observed that the Brazilian tensile strength overestimated the tensile strength. Furthermore, an exponential correlation was introduced between the direct tensile strength and the Brazilian tensile strength.

查看原文本刊更多论文

几种间接试验在各向异性岩石抗拉强度估算中的适用性

岩石的抗拉强度在其破坏机制中起着重要的作用，它的确定有助于岩石结构的优化设计。由于片岩在不同的片理方向上具有固有的各向异性，因此片岩在各个方向上表现出不同的强度。本文的目的是比较和评价千叶岩在不同理向上的直接和间接拉伸试验所得的抗拉强度。为此，制备了与加载轴(β)相关的不同叶理角(0、30、45、60、90)的千粒岩样品。最后，对188个试件进行了直接拉伸试验、直径和轴向点载荷试验、巴西试验和施密特锤试验。试验结果表明，直接拉伸试验张力的最大和最小抗拉强度与0°和90°角直接相关。同时发现巴西抗拉强度高估了抗拉强度。此外，引入了直接抗拉强度与巴西抗拉强度之间的指数相关关系。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Mining and Environment MINING & MINERAL PROCESSING-

CiteScore

1.90

自引率

25.00%

发文量