Advances in Rock Mass Structural-Dependent Cyclic and Fatigue Behaviors

Topic Information

Dear Colleagues,

Rock mass often consists of different types of discontinuous structures, such as cleavages, foliations, beddings, laminae, joints, faults, etc. The existence of those discontinuities will impose significant effects on the geomechanical properties of rock mass. In addition, environmental and human-induced loading acting on engineering rock mass is cyclic in essence, as the cyclic or fatigue mechanical responses of rock mass are certainly structural-controlled. Rock mass with different kinds of structures usually exhibit distinct responses with respect to the disturbed stress. Meanwhile, the disturbed stress accelerates the deterioration of rock structures, which may finally result in serious geohazards, e.g., landslides, rock collapses, spalling, water inrush, etc., and differential fracturing responses under multi-field and multi-phase coupling conditions. As a result, it is crucial to investigate the cyclic or fatigue behaviors of rock mass by thoroughly considering its multi-scale structural effects. For the recent decade, the hotspots for geomechanics research concerning the rock mass structure include:

(1) Structural deterioration of rock mass, such as the coupling effects of flow and stress fields on rock geo-mechanics;
(2) Deep resource and energy development related to fluid flow in fracture networks, such as the cyclic hydraulic fracturing on reservoir rock;
(3) Macro-meso fracture mechanism and modeling method for fatigue instability predication;
(4) Effects of freeze-thaw cycling on geomechanical behaviors for naturally fractured rock mass;
(5) Effects of cyclic impacting loads on multiple-scale failure behaviors for deep underground rock mass.

This Topic aims to collect recent advances in rock mass structural geomechanics exposed to fatigue or cyclic loading conditions; in addition, the articles should provide meaningful approaches and experiences to address the above-mentioned challenge in both a scientific and in situ scale. We sincerely invite you to submit comprehensive review papers and original articles. Potential topics include but are not limited to the following:

(1) Reporting the typical dynamic instability hazards caused by stress disturbance in rock mass;
(2) Rock structural controlled cyclic or fatigue instability characteristics in engineering rock mass;
(3) Advanced multi-phase, multi-field, and multi-scale coupling models to predict fatigue instability hazards;
(4) New apparatus and methods to observe the occurrence and development of cracks during fatigue instability;
(5) New theory to predict instability hazards in deep mine engineering rock mass;
(6) Advanced numerical simulation developments for predicting fatigue instability;
(7) In situ detection and monitoring of rock fatigue instability based on advanced apparatus;
(8) Fatigue instability prediction using a machine learning or big data platform;
(9) Advanced methods to control rock engineering instability;
(10) Coupled freeze-thaw-mechanical loads on rock damage modeling;
(11) Effect of freeze-thaw treatment and stress disturbance on rock geomechanical properties;
(12) Effects of rock structure on hydraulic fracturing treatment for gas- or oil-containing rock mass;
(13) Effects of macroscopic and mesoscopic rock structures on rock damage and fracture evolution;
(14) Coupled flow-disturbed stress on rock structure deterioration effects;
(15) Coupled freeze-thaw-mechanical loads on rock damage modeling;
(16) Cyclic hydraulic fracturing on meso-structure changes and stimulated reservoir volume.

Prof. Dr. Yu Wang
Dr. Yingjie Xia
Topic Editors

Keywords

Participating Journals

Journal Name	Impact Factor	CiteScore	Launched Year	First Decision (median)	APC
Energies energies	3.2	5.5	2008	15.7 Days	CHF 2600	Submit
Geosciences geosciences	2.7	5.2	2011	22.6 Days	CHF 1500	Submit
Materials materials	3.4	5.2	2008	14.7 Days	CHF 2600	Submit
Minerals minerals	2.5	3.9	2011	17 Days	CHF 2400	Submit
Mining mining	-	-	2021	18.9 Days	CHF 1000	Submit

Published Papers (2 papers)

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All Energies Geosciences Materials Minerals Mining

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Open AccessArticle

Triaxial Test Study on Energy Evolution of Marble after Thermal Cycle

by

Qi Wu

,

Bowen Li

and

Xuehai Jiang

Minerals 2023, 13(3), 428; https://doi.org/10.3390/min13030428 - 17 Mar 2023

Viewed by 730

Abstract

With the increasing requirements for the exploitation of underground resources, the subject of the physical and mechanical properties of rocks under high temperature and pressure needs to be studied urgently. In order to analyze the mechanical and energy characteristics of rocks under different [...] Read more.

With the increasing requirements for the exploitation of underground resources, the subject of the physical and mechanical properties of rocks under high temperature and pressure needs to be studied urgently. In order to analyze the mechanical and energy characteristics of rocks under different thermal damages and confining pressures (c), a triaxial compression test is performed on 35 marble samples. The effects of thermal damage and high pressure are simulated with different thermal cycles and confining pressures. The results show that as the number of thermal cycles increases, the peak strain of marble gradually rises, but the peak stress and the elastic modulus (E) decrease by a degree, reaching 11.19‰, 39.53 MPa, 4.79 GPa, while there is no confining pressure applied at eight thermal cycles. At this point, the failure mode gradually changes from brittle fracture to plastic failure. When confining pressure rises, peak stress, peak strain, and elastic modulus all show an upward trend, reaching a maximum of 189.45 MPa, 13.39‰, 35.41 GPa, while the sample is undamaged at 30 MPa confining pressure. Moreover, peak stress increases linearly with confining pressure increase. The increased rate of the peak value of the total absorbed energy, elastic strain energy, and dissipated energy all show a convex trend. The dissipated energy gradually increases with the axial strain (ε₁) during the rock loading process. The elastic strain energy has an energy storage limit, but the rock fails when the value exceeds the limit. The limit increases first and then decreases with the number of thermal cycles. These results can provide important engineering references for mining underground resources. Full article

(This article belongs to the Topic Advances in Rock Mass Structural-Dependent Cyclic and Fatigue Behaviors)

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Open AccessArticle

Study on the Evolution of Physical Parameters and Dynamic Compression Mechanical Properties of Granite after Different Heating and Cooling Cycles

by

Hongzhong Zhang

,

Linqi Huang

,

Xibing Li

,

Xingmiao Hu

and

Yangchun Wu

Materials 2023, 16(6), 2300; https://doi.org/10.3390/ma16062300 - 13 Mar 2023

Viewed by 669

Abstract

The study of the evolution law of basic physical parameters and dynamic compression performance of deep granite under the environment of the heating-cooling cycle is of great significance for the stability evaluation of deep underground engineering and the development of deep resources. In [...] Read more.

The study of the evolution law of basic physical parameters and dynamic compression performance of deep granite under the environment of the heating-cooling cycle is of great significance for the stability evaluation of deep underground engineering and the development of deep resources. In this study, heating-cooling cycle tests and dynamic compression tests were conducted on a large number of fine-grained granite specimens with heating temperatures from 200 to 600 °C and times from one to twenty times using a box-type high-temperature muffle furnace and Hopkinson pressure bar (SHPB) test system, and the evolution law of basic physical parameters and dynamic compression mechanical properties of fine-grained granite were studied using theoretical and fitting analysis. The test results showed that: the changes of the basic physical parameters of granite have obvious temperature effect; 600 °C is a threshold value for the changes of each physical parameter of granite; the sensitivity of each physical parameter to the number of heating and cooling cycles is small before 600 °C; and the sensitivity of each physical parameter to the number of heating and cooling cycles significantly increases at 600 °C. The dynamic compressive strength and elastic modulus of granite decreased with the increase in heating and cooling cycles, and the maximum decrease rate was 89.1% and 85.9%, respectively, and the strain rate linearly increased with the increase in heating and cooling cycles, and the maximum strain rate was 123 s⁻¹. The temperature, the number of heating and cooling cycles, and the impact air pressure, all had significant effects on the damage mode and crushing degree of granite. Full article

(This article belongs to the Topic Advances in Rock Mass Structural-Dependent Cyclic and Fatigue Behaviors)

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