Enhancing the bearing capacity of friction anchor bolts through cementitious concrete injection for reinforced support in underground mine

Q4 Engineering

Scientific Mining Journal Pub Date : 2023-10-09 DOI:10.30797/madencilik.1312485

Soufı AMINE

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引用次数: 0

Abstract

Friction anchor bolts are commonly used for providing support in underground structures by relying on frictional forces between the bolt and the surrounding rock. This study proposes a method to enhance the efficiency of these bolts by injecting a cement-based mixture comprising cement, sand, and additives. The injection of this mixture into the bolt results in internal expansion, which reinforces the friction and bearing capacity of the bolt. The increased volume exerts a radial force, leading to improved adherence, load transfer, and void filling. Pullout tests were conducted on various rock masses to evaluate the performance of the anchor bolts. The results demonstrate increased pullout resistance with higher rock mass quality and longer cemented bolts. Additionally, the use of a silicate-based additive accelerated the curing time of the cement, enhancing the strength of the bolts. The study also highlights the significant influence of groundwater on the bearing capacity of the bolts. These findings indicate the effectiveness of cemented concrete injection in strengthening friction anchor bolts and their anchorage in underground structures.

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地下矿山注浆加固支护提高摩擦锚杆承载力

摩擦锚杆是地下结构中常用的依靠锚杆与围岩之间的摩擦力提供支护的锚杆。本研究提出了一种通过注入由水泥、沙子和添加剂组成的水泥基混合物来提高这些螺栓效率的方法。将这种混合物注入锚杆会导致内部膨胀，从而增强锚杆的摩擦和承载能力。增加的体积施加径向力，从而改善附着力、载荷传递和空隙填充。对不同岩体进行了拉拔试验，对锚杆的性能进行了评价。结果表明，岩体质量越高，锚固锚杆越长，抗拔能力越强。此外，硅酸盐基添加剂的使用加速了水泥的固化时间，提高了螺栓的强度。研究还强调了地下水对锚杆承载力的显著影响。这些研究结果表明，水泥混凝土注入对地下结构中摩擦锚杆及其锚固的加固是有效的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Scientific Mining Journal Engineering-Industrial and Manufacturing Engineering

CiteScore

0.60

自引率

0.00%

发文量

期刊介绍： Scientific Mining Journal, which is published i n open access electronic environment and i n printed, is a periodical scientific journal of Union of Chambers of Turkish Engineers and Architects Chamber of Mining Engineers. The name of the journal was "Mining" until June 2016 and it has been changed to "Scientific Mining Journal" since September 2016 because it can be confused with popular journals with similar names and the ISSN number has been updated from 0024-9416 to 2564-7024. Scientific Mining Journal, published four times a year (March-June-September-December), aims to disseminate original scientific studies which are conducted according to the scientific norms and publication ethics at national and international scale, to scientists, mining engineers, the public; and thus to share scientific knowledge with society. The journal is in both Turkish and English. The journal covers theoretical, experimental, and applied research articles, which reflects the findings and results of an original research i n the field of mining engineering; review articles, which assess, evaluates, and interprets the findings of a comprehensive review of sufficient number of scientific articles and summarize them at present information and technology level; technical notes, which may be defined as a short article that describes a novel methodology o r technique; a case studies, which are based on the theoretical o r real professional practice and involves systematic data collection and analysis.