Fractal analysis to determine JRC on sandstones and its correlation to SRF, Ende-Lianunu Regency, East Nusa Tenggara Province, Indonesia

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-09-01 DOI:10.11591/ijaas.v12.i3.pp214-225

Tien Veny Vera, Sari Bahagiarti Kusumayudha, Singgih Saptono, Kurniawan Kurniawan

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Abstract

The study area is located in Ende-Lianunu Regency, East Nusa Tenggara Province, Indonesia, with mountainous and hilly morphology, and is part of the Kiro Formation which is composed of tuffaceous sandstones. Discontinuities in the sandstone are in the form of bedding planes and joints, which affect the mechanical properties of the rock mass, reduce its strength, and affect slope stability. The discontinuity condition that affects mechanical behavior is surface roughness. This research aims to define the fractal dimension value of surface roughness using a box-counting method, joint roughness coefficient (JRC), and simulate the strength reduction factor (SRF) value on slopes that have a certain JRC. The fractal dimension of fine-grained samples = 1.0010 and coarse-grained = 1.0056. The average JRC value is 6.25 (Range 4-6). Simulation at JRC 0-20, gives different SRF values. On slopes with JRC = 0, the critical SRF = 1.35. If JRC = 20, the critical SRF = 1.47. It can be inferred, that the fractal dimension of the roughness of the sliding plane correlates with JRC and SRF. As the fractal dimension value increases, so do the JRC and SRF values, resulting in more stable slope conditions.

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印度尼西亚东努沙登加拉省Ende-Lianunu Regency砂岩JRC的分形分析及其与SRF的相关性

研究区位于印度尼西亚东努沙登加拉省Ende-Lianunu Regency，为多山丘陵地貌，属于由凝灰质砂岩组成的Kiro组的一部分。砂岩中的不连续面以层理面和节理的形式存在，影响岩体的力学特性，降低岩体的强度，影响边坡的稳定性。影响机械行为的不连续条件是表面粗糙度。本研究旨在通过盒计数法定义表面粗糙度的分形维数值，即joint roughness coefficient (JRC)，并在具有一定JRC的边坡上模拟强度折减因子(SRF)值。细粒样品的分形维数为1.0010，粗粒样品的分形维数为1.0056。平均JRC值为6.25(范围4-6)。模拟在JRC 0-20，给出不同的SRF值。当JRC = 0时，临界SRF = 1.35。若JRC = 20，则临界SRF = 1.47。可以推断，滑动面粗糙度的分形维数与JRC和SRF相关。随着分形维数的增大，JRC和SRF值也随之增大，边坡条件更加稳定。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.