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Applied Sciences
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Rock-Like Material Characterization and Engineering Properties
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Rock-Like Material Characterization and Engineering Properties

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Materials Science and Engineering".

Deadline for manuscript submissions: 20 July 2024 | Viewed by 2589

Special Issue Editors

Dr. Taoying Liu

E-Mail Website
Guest Editor
School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Interests: rock materials and engineering
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Jianhua Hu

E-Mail Website
Guest Editor
Zijin School of Geology and Mining, Fuzhou University, Fuzhou 350108, China
Interests: mining engineering
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Rocks, minerals, and other rock-like materials are the most widely distributed tool materials in nature and in human history. The composition of rock materials is complex, especially after a long period of natural progress, through which a variety of structural planes and tiny defects (cracks, cracks, pores, voids, faults, etc.) form. In recent years, with human exploration activities continuing to go deep into the earth and even up on the moon, Mars, and other complex environment regions, it is necessary to fully understand the characteristics of rock-like materials and determine/predict their engineering properties before project construction, especially under extreme physical conditions such as high confining pressure, high water seepage, and extremely low or high temperatures. A variety of novel experimental research studies, theoretical analyses, numerical simulations, and intelligent algorithms can be used to explore the special material properties and applied to slopes, tunnels, underground caverns, underground mines, and other related projects to benefit engineering design and implementation. The purpose of this Special Issue is to publish original research and critical articles in these fields.

You may choose our Joint Special Issue in Materials.

Dr. Taoying Liu
Prof. Dr. Jianhua Hu
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • complex geological environment
  • macro-and micro-failure mechanical properties
  • damage fracture model and failure mechanism
  • numerical calculations and theoretical analysis
  • laboratory test and engineering application

Published Papers (3 papers)

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Research

16 pages, 10768 KiB  
Article
Experimental Investigation on the Destruction Features and Acoustic Characteristics of a Brittle Rock Sample Containing Both 2D and 3D Preset Flaws
by Tao Luo, Siyu Chen and Binglei Li
Appl. Sci. 2023, 13(23), 12705; https://doi.org/10.3390/app132312705 - 27 Nov 2023
Cited by 1 | Viewed by 510
Abstract
Original fracture structures always present discontinuity in the real rock mass, and many invisible fractures hide inside the rock mass, which may cause serious engineering safety issues. To mimic the true 3D fracture structures through the experimental method, the gypsum rock-like samples containing [...] Read more.
Original fracture structures always present discontinuity in the real rock mass, and many invisible fractures hide inside the rock mass, which may cause serious engineering safety issues. To mimic the true 3D fracture structures through the experimental method, the gypsum rock-like samples containing both 2D through-type and 3D internal-type preset flaws are prepared, and multiple sets of inclination angles of the twin parallel flaws are set in the test. By applying the AE and DIC monitoring technologies during the uniaxial compression tests, the main results are as follows: (1) The flaw inclination angle presents a direct influence on the surface cracks distribution, maximum principal strain field, and the density of secondary failure in the middle rock; (2) AE events initially distribute around the internal 3D preset flaw, while the gradient inclination angle shows a slight impact on the events’ location before reaching the UCS status of samples; (3) mutations in b-values and S values can serve as evidence for predicting local damage, and the final failures quickly form at various scales and energy levels; (4) when the statistical analysis grid is divided sufficiently, the data window width and moving step length have little impact on the evaluation results, while the recommended bin width of event magnitude is 0.5 or 1.0. Full article
(This article belongs to the Special Issue Rock-Like Material Characterization and Engineering Properties)
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21 pages, 14699 KiB  
Article
Experimental Study on the Fracture Characteristics of Hole-Crack in Rock-like Material under Biaxial Compression
by Yuan Tian, Bangcheng Han, Xinyu Liu, Kai Shen and Jiangbo Li
Appl. Sci. 2023, 13(17), 9963; https://doi.org/10.3390/app13179963 - 04 Sep 2023
Cited by 1 | Viewed by 630
Abstract
Using experimental methods to study the influence of hole and cracks on the mechanical properties and fracture characteristics of rock-like mortar materials under biaxial compression conditions. The double crack specimens with hole depths from 0–100 mm are prefabricated to study the strength and [...] Read more.
Using experimental methods to study the influence of hole and cracks on the mechanical properties and fracture characteristics of rock-like mortar materials under biaxial compression conditions. The double crack specimens with hole depths from 0–100 mm are prefabricated to study the strength and deformation characteristics of the specimens under different lateral loads σ2 = 0–6 MPa. The evolution process of secondary crack initiation, development, and connection of the hole-crack specimens are recorded. The results show that: (1) One type of rock mortar test material is prepared, and its main physical and mechanical parameters are all within the range of sandstone, which can effectively simulate the stress deformation characteristics of sandstone. (2) When the depth of the holes in cracked samples exceeds 50% of the length, the strength and deformation of the samples undergo a sudden change. When the depth of the hole in the crack specimen increases from 40 mm to 60 mm, the peak stress decreases most significantly. Moreover, the maximum values of the strain value at peak strength and lateral strain both occur at a hole depth of 60 mm. (3) When the cracked specimen contains through-holes, the failure mode is composite fracture and shear composite fracture. When the depth of the hole is different, the fracture forms include tension composite fracture, shear composite fracture, and composite fracture. Full article
(This article belongs to the Special Issue Rock-Like Material Characterization and Engineering Properties)
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17 pages, 1841 KiB  
Article
Application of K-PSO Clustering Algorithm and Game Theory in Rock Mass Quality Evaluation of Maji Hydropower Station
by Yunkai Ruan, Jinzi Chen, Zhongmou Fan, Tanhua Wang, Jianguo Mu, Ranran Huo, Wei Huang, Weicheng Liu, Yunjian Li and Yunqiang Sun
Appl. Sci. 2023, 13(14), 8467; https://doi.org/10.3390/app13148467 - 21 Jul 2023
Cited by 3 | Viewed by 912
Abstract
In this study, the K-means algorithm based on particle swarm optimization (K-PSO) and game theory are introduced to establish the quality evaluation model of a rock mass. Five evaluation factors were considered, i.e., uniaxial saturated compressive strength of rock, discontinuity spacing, acoustic velocity, [...] Read more.
In this study, the K-means algorithm based on particle swarm optimization (K-PSO) and game theory are introduced to establish the quality evaluation model of a rock mass. Five evaluation factors were considered, i.e., uniaxial saturated compressive strength of rock, discontinuity spacing, acoustic velocity, rock quality designation (RQD), and integrity coefficient. The rock mass of an elevation adit at the abutment of Maji hydropower station was taken as a case study. The subjective weight of the evaluation factor was determined by the weighted least squares method, and the objective weight of the evaluation factor was determined by the entropy method. The combined weights of each influencing factor were determined by game theory to be 0.142, 0.179, 0.035, 0.116, and 0.108. The rock mass quality evaluation in the study area was analyzed by K-PSO algorithm. The results indicate that the K-PSO clustering results are almost the same as the evaluation results of the traditional basic quality (BQ) classification method and the widely used extension evaluation method and are consistent with the preliminary judgment of the expert field. The results are consistent with the field observation law. It is considered that the K-PSO clustering theory can reflect the engineering geological characteristics of the rock mass of the hydropower project in the rock mass quality evaluation. Full article
(This article belongs to the Special Issue Rock-Like Material Characterization and Engineering Properties)
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