International Journal of Rock Mechanics and Mining Sciences最新文献

{"title":"Novel insights into grain size effect of stressed crystalline rock using weakened grain boundary model","authors":"Zheng Yang ,&nbsp;Ming Tao ,&nbsp;P.G. Ranjith","doi":"10.1016/j.ijrmms.2025.106098","DOIUrl":"10.1016/j.ijrmms.2025.106098","url":null,"abstract":"<div><div>The grain size effect of rocks is crucial for engineering applications, including mining, tunneling, and oil extraction. Previous studies on the effect of grain size revealed discrepancies between experimental results and numerical simulations, hindering accurate predictions of rock strength and deformation. Initially, a parallel bond model was applied to describe the grain boundary contacts and investigate the effect of the grain size under initial stress conditions. The results of this model indicated that the uniaxial compressive strength (UCS) and Young's modulus increased with an increasing grain size, thus contradicting the experimental findings. Under the initial stress, the sample strength exhibited an irregular variation with grain size in this model. By analyzing the differences between the experimental and numerical results, a novel weakening grain boundary model (WGBM) that considers the strength and Young's modulus is proposed. The introduction of a grain boundary degradation factor provides a practical method by which to simulate the reductions in the strength and Young's modulus at grain boundaries as the grain size increases, which thereby enables a more realistic representation of the rock grain boundary behavior. The WGBM captured the experimental trends more accurately, and the UCS and Young's modulus decreased with an increasing grain size. Without the initial stress, the ratio of intergranular to intragranular cracks exceeded 2.5. The initial stress suppressed the propagation of intergranular cracks, and the intergranular and intragranular cracks were concentrated in one or more shear bands. Under initial stress conditions, the strength fluctuated slightly with an increasing grain size but showed an overall decreasing trend. The results and methods provide new insights into rock mechanics and related applications.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"189 ","pages":"Article 106098"},"PeriodicalIF":7.0,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143714685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Distributed acoustic sensing (DAS) for longwall coal mines","authors":"Derrick Chambers ,&nbsp;Alexander Ankamah ,&nbsp;Ahmad Tourei ,&nbsp;Eileen R. Martin ,&nbsp;Tim Dean ,&nbsp;Jeffery Shragge ,&nbsp;John A. Hole ,&nbsp;Rafal Czarny ,&nbsp;Gareth Goldswain ,&nbsp;Jako du Toit ,&nbsp;M. Shawn Boltz ,&nbsp;James McGuiness","doi":"10.1016/j.ijrmms.2025.106090","DOIUrl":"10.1016/j.ijrmms.2025.106090","url":null,"abstract":"<div><div>Seismic monitoring of underground longwall mines can provide valuable information for managing coal burst risks and understanding the ground response to extraction. However, the underground longwall mine environment poses major challenges for traditional in-mine microseismic sensors including the restricted use of electronics due to potentially explosive atmospheres, the need to frequently and quickly relocate sensors as rapid mining progresses, and source parameter errors associated with complex time-dependent velocity structure. Distributed acoustic sensing (DAS), a technology that uses rapid laser pulses to measure strain along fiber-optic cables, shows potential to alleviate these shortcomings and improve seismic monitoring in coal mines when used in conjunction with traditional monitoring systems. Moreover, because DAS can acquire measurements that are not possible to record with traditional seismic sensors, it also enables entirely new monitoring approaches. This work demonstrates several DAS deployment strategies such as deploying fiber on the mine floor, in boreholes drilled from the surface and from mine level, on the longwall mining equipment, and wrapped around secondary support cans. Although there are several data processing and deployment improvements needed before DAS-based monitoring can become routine in underground longwall mines, the findings presented here can aid decision makers in assessing the potential of DAS to meet their needs and help guide future deployment designs.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"189 ","pages":"Article 106090"},"PeriodicalIF":7.0,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bio-inspired energy-efficient strategy for rock abrasion","authors":"Kai Guo,&nbsp;Wei Wu","doi":"10.1016/j.ijrmms.2025.106095","DOIUrl":"10.1016/j.ijrmms.2025.106095","url":null,"abstract":"<div><div>Shield tunnelling was inspired by the burrowing process of bivalve mollusk shipworm. Recent studies have discovered new species of freshwater bivalves capable of burrowing into underwater rock. These bivalves dissolve cementing minerals using organic acid and then trap hard minerals on their shell surfaces via microbial biofilm to promote mechanical abrasion. This study aimed to understand the bioerosion mechanisms, which could inspire future advancements in burrowing technologies. Here we investigated the bioerosion mechanisms by performing a series of direct-shear experiments on intact limestone – smooth steel interface, chemically treated limestone – smooth steel interface, intact limestone – quartz-coated steel interface, and chemically treated limestone – quartz-coated steel interface. By comparing the shear behaviors and the abrasion characteristics of the four interfaces, we found that the chemically treated limestone – quartz-coated steel interface, which simulates the combining acid treatment and quartz coating strategies of the bivalves, promotes rock abrasion while achieving the highest energy efficiency. Our results indicate that acid treatment enhances abrasive wear by enabling deep indentation into fractured rock, while quartz coating improves energy efficiency and maintains it at a high level. This energy-efficient strategy for rock abrasion has significant potential for addressing technical challenges in subsurface engineering, such as improving rock-breaking efficiency and reducing cutting tool wear.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"189 ","pages":"Article 106095"},"PeriodicalIF":7.0,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rockburst probability early warning method based on integrated infrared temperature and acoustic emission parameters","authors":"Fuqiang Ren ,&nbsp;Zhenyu Gao ,&nbsp;Ke Ma ,&nbsp;Shun Yang","doi":"10.1016/j.ijrmms.2025.106097","DOIUrl":"10.1016/j.ijrmms.2025.106097","url":null,"abstract":"<div><div>Early warning of rockburst is a critical part of deep rock engineering; yet the selection of reliable indicators, the establishment of effective warning thresholds, and understanding of triggering mechanisms require further refinement. This paper presents a novel framework for early warning of rockburst, developed based on the integrated monitoring of infrared (IR) and acoustic emission (AE) data. Two distinct rockburst tests, simulating static-driven and dynamic-trigger scenarios, were conducted to obtain time series data of IR and AE parameters. The sliding window method was employed to segment the time series data, and statistical characteristics were extracted for each segment. Extreme differences in IR temperature and AE amplitude were identified as potential warning indicators. To enhance the lead time of early warning, three time series prediction models were applied to forecast the variation trends of the identified indicators. A comprehensive analysis of prediction error and generalization ability revealed that the Long Short-Term Memory (LSTM) model was the most suitable method for this prediction task. The cosine similarity was utilized to establish warning thresholds for each indicator, and a rockburst probability index was calculated using Bayesian theory. The effectiveness of the proposed framework was validated through laboratory-scale rockburst tests. The probability calculation revealed that the warning indicator exhibiting higher volatility, specifically AE amplitude, served as a more effective prior event.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"189 ","pages":"Article 106097"},"PeriodicalIF":7.0,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fractal characteristics and acoustic early warning index of rock with thermal storage potential under fatigue fracturing","authors":"Zhanming Shi ,&nbsp;Jiangteng Li ,&nbsp;P.G. Ranjith ,&nbsp;Mengxiang Wang ,&nbsp;Hang Lin ,&nbsp;Dongya Han ,&nbsp;Kaihui Li ,&nbsp;Taoying Liu","doi":"10.1016/j.ijrmms.2025.106065","DOIUrl":"10.1016/j.ijrmms.2025.106065","url":null,"abstract":"<div><div>Fatigue fracturing technology is of great significance to improve the efficiency of geothermal energy extraction and reduce the risk of induced earthquakes. In this study, granite with thermal storage potential was selected as the sample, and carried out conventional fracturing (monotonic pressurization) and fatigue fracturing (pulsating pressurization) tests. First, the influence of fracturing mode on the fractal characteristics of the samples was analyzed. The fractal dimension and 3D roughness of the samples were calculated, and the distribution characteristics of morphology parameters on the sample surface were analyzed. Then, the differences in the microcrack evolution process under different fracturing modes were compared based on the acoustic emission (AE) frequency spectrum characteristics and energy. Finally, this study used the function F to analyze the time series of AE events and established an acoustic early warning index. Our laboratory work has shown that as the temperature increases, the strength and fracture toughness of the sample under the coupling effect of high temperature-fatigue load decrease nonlinearly, the fractal dimension and 3D roughness increase linearly, and the maximum cumulative AE energy increases exponentially. The height difference of the sample surface increases, the normality of the slope angle distribution weakens, the grayscale gradient increases, and the texture information increases. The peak frequency signals of the samples under conventional fracturing and fatigue fracturing are mainly concentrated in 100 kHz–400 kHz. Compared with conventional fracturing, the energy release of the sample under fatigue fracturing increased by about 10 %, and the fracture toughness decreased by about 10 %. Under fatigue fracturing, the number of cracks generated in the sample is greater, the size is larger, and the growth time is longer. The fracture morphology of the sample is also more complex and rougher. Fatigue fracturing is superior to conventional fracturing in promoting energy dissipation inside rocks and low stress-induced crack growth.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"189 ","pages":"Article 106065"},"PeriodicalIF":7.0,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Propagation and arrest of multiple radial thermal fractures transverse to a horizontal well","authors":"Bin Chen ,&nbsp;Quanlin Zhou","doi":"10.1016/j.ijrmms.2025.106092","DOIUrl":"10.1016/j.ijrmms.2025.106092","url":null,"abstract":"<div><div>Transverse thermal fractures in horizontal wells can be induced by cold fluid injection into high-temperature formations during drilling, geothermal production, CO₂ storage, etc. As these fractures propagate, some are arrested due to stress interaction, resulting in a hierarchical fracture pattern. This study investigates the propagation and arrest of radial transverse thermal fractures in a horizontal well driven by 1-D radial heat conduction using an axisymmetric model. We derived a new elasticity equation for multiple radial thermal fractures in a horizontal well, and developed the dimensionless governing equations, in terms of dimensionless fracture penetration depth <span><math><mrow><mi>L</mi></mrow></math></span>, spacing <span><math><mrow><mi>D</mi></mrow></math></span>, aperture <span><math><mrow><mi>Ω</mi></mrow></math></span>, time <span><math><mrow><mi>τ</mi></mrow></math></span>, and two model parameters (dimensionless net confining stress <span><math><mrow><mi>T</mi></mrow></math></span> and wellbore radius <span><math><mrow><mi>A</mi></mrow></math></span>) through parameter scaling. Displacement discontinuity method was employed to discretize the governing equations and the dimensionless solutions [<span><math><mrow><mi>L</mi><mrow><mo>(</mo><mrow><mi>τ</mi><mo>,</mo><mi>T</mi><mo>,</mo><mi>A</mi></mrow><mo>)</mo></mrow></mrow></math></span>, <span><math><mrow><mi>D</mi><mrow><mo>(</mo><mrow><mi>τ</mi><mo>,</mo><mi>T</mi><mo>,</mo><mi>A</mi></mrow><mo>)</mo></mrow></mrow></math></span>, <span><math><mrow><mi>Ω</mi><mrow><mo>(</mo><mrow><mi>τ</mi><mo>,</mo><mi>T</mi><mo>,</mo><mi>A</mi></mrow><mo>)</mo></mrow></mrow></math></span>] for the critical states at fracture arrests were solved through stability analysis. The fully transient solutions with stepwise fracture spacing were then obtained to predict the hierarchical fracture pattern. Our findings indicate that the solutions for the radial transverse fractures are asymptotic to those for half-plane thermal fractures at early time and the evolution of fracture penetration depth approaches to a scaling law <span><math><mi>L</mi><mo>=</mo><mi>f</mi><mfenced><mrow><mi>T</mi><mo>,</mo><mi>A</mi></mrow></mfenced><msup><mi>τ</mi><mrow><mfenced><mrow><mn>1</mn><mo>−</mo><mi>T</mi></mrow></mfenced><mo>/</mo><mn>2</mn></mrow></msup></math></span> at late time. Application to a real geothermal site showed that thermal fractures reach depths of 0.48, 3.48, and 28.29 m, spacings of 0.46, 2.34, and 13.20 m, and apertures (at the wellbore wall) of 0.37, 1.53, and 6.15 mm at 1, 100 and 10,000 days of cooling, respectively.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"189 ","pages":"Article 106092"},"PeriodicalIF":7.0,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143678175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A regularized fracture-based continuum model for simulating tunneling-induced rock mass collapse","authors":"Penghao Zhang,&nbsp;Kurt Douglas,&nbsp;Adrian R. Russell","doi":"10.1016/j.ijrmms.2025.106086","DOIUrl":"10.1016/j.ijrmms.2025.106086","url":null,"abstract":"<div><div>Tunneling in brittle rock masses under high stress may be accompanied by fracture-induced collapses, that is a complete loss of the structural load carrying capacity. Predicting the location and extent of the collapses is crucial for ensuring construction safety and designing support systems. This study proposes a novel fracture-mechanics-based continuum model for simulating excavation-induced collapses in highly stressed rock masses. It captures the excavation damaged zone caused by microcrack initiation as well as the transition to a highly damaged zone formed by macroscopic fracture propagation. The modeling is unique in that the simulated cracks are regularized to alleviate the mesh dependency. For large-scale problems the mesh size selection depends only on the characteristic length <span><math><mrow><msub><mi>l</mi><mn>0</mn></msub></mrow></math></span> of the smeared fracture band. It is shown that the correct scaling of <span><math><mrow><msub><mi>l</mi><mn>0</mn></msub></mrow></math></span> in tunnel-scale problems enables relatively coarse meshes to be adopted, significantly reducing computational time. Additionally, a novel method for introducing structural discontinuities into an excavated rock mass is presented, enabling the simulation of interactions between pre-existing geological discontinuities and excavation-induced fractures. Two tunnel excavation case studies are presented, demonstrating the model's capability of simulating fracture propagation, final collapse zones and corresponding rock mass deformation induced by excavation.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"189 ","pages":"Article 106086"},"PeriodicalIF":7.0,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143678243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultrasonic and NMR-based estimation of the microstructure at ice-rock interface","authors":"Hailiang Jia ,&nbsp;Xianhuan Liu ,&nbsp;Xianjun Tan ,&nbsp;Liu Yang ,&nbsp;Jielin Li","doi":"10.1016/j.ijrmms.2025.106091","DOIUrl":"10.1016/j.ijrmms.2025.106091","url":null,"abstract":"<div><div>The mechanical properties of frozen rock mass are primarily determined by that of ice and ice-rock interface, the latter is further controlled by the microstructure at ice-rock interface. To investigate the temperature-dependent variations in the microstructure at ice-rock interface, the concept of ice-rock interface cohesive zone (ICZ) was firstly defined. Ultrasonic and NMR (nuclear magnetic resonance) tests were conducted on the frozen intact sandstone, pure ice and ice-rock binary samples at varying thawing temperatures. Observations of the microstructure at the ICZ were carried out through 1D-MRI (one-dimensional magnetic resonance imaging) experiments. The results indicate that: (1) by comparing the ultrasonic results of frozen intact sandstone, pure ice and ice-rock binary samples, it is found that the ICZ notably alters the propagation of ultrasonic waves through the samples. (2) During thawing process, the ultrasonic parameters and the total NMR signal amplitude in ice-rock binary samples exhibit a two-stage variation trend, with an inflection point temperature of −2 °C. (3) The NMR-estimated ICZ thickness displays a two-stage variation trend with thawing temperature, with inflection point temperature both at −2 °C as well. (4) The primary factor contributing to the higher attenuation rate of ultrasonic parameters in the ice-rock binary sample is the continuous increase of ICZ thickness at the ice-rock interface with thawing temperature. Through the ICZ thickness estimation model, it reveals that the experimental and estimated values of the ICZ thickness maintain consistency in the overall trend. Both sets of values demonstrate a two-stage variation with different temperatures and the inflection point temperature of −2 °C.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"189 ","pages":"Article 106091"},"PeriodicalIF":7.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143642819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental investigation of rock mineralogical effect on energy transfer and rockbursts induced by tensile fracturing of roof strata","authors":"Binwen Ma ,&nbsp;Heping Xie ,&nbsp;Xiufeng Zhang ,&nbsp;Hongwei Zhou ,&nbsp;Changtai Zhou ,&nbsp;Wenbin Sun ,&nbsp;Jianbo Zhu","doi":"10.1016/j.ijrmms.2025.106087","DOIUrl":"10.1016/j.ijrmms.2025.106087","url":null,"abstract":"<div><div>The elastic energy released by the tensile fracturing of hard roof strata is partially transferred to surrounding rocks and causes rockbursts during underground coal exploitation. However, the effect of rock mineralogical properties on the transferred energy and rockbursts has not been quantitatively analysed. In this study, three-point bending tests were conducted to reproduce the tensile fracturing of roof strata, with the transferred energy, i.e., the radiated energy as acoustic emission (AE) events and the kinetic energy of fractured rock, being calculated using a calibrated AE system and a digital image correlation (DIC) system. The effects of rock cementation, rock grain size and mineral composition on the energy transfer were quantitatively analysed. The energy transfer during the tensile fracture of roof strata is 2–3 orders of magnitude higher in the siliceous roof strata than in the argillaceous ones. The energy transfer for the siliceous strata stems mainly from the kinetic energy of fractured strata that is one order of magnitude higher than the radiated energy. The high kinetic energy is attributed to a very high crack velocity of 225 m/s. Owing to localized micro-shear failure and the detachment of rock grains, the energy transfer stems mainly from the radiated energy for the argillaceous strata. The energy transfer increases with the increased grain size and brittle minerals. It can be found that rock cementation plays a domain role in the rock mineralogical effects on the energy transfer and rockbursts compared to grain size and mineral component. The tensile fracture of brittle siliceous cemented strata exhibits a much greater rockburst hazard than plastic cemented strata. These findings have implications for the identification of roof strata with rockburst hazards and the effective prevention of rockburst disasters caused by the tensile fracture of hard key roof strata.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"189 ","pages":"Article 106087"},"PeriodicalIF":7.0,"publicationDate":"2025-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Superstatistical approach of electric potential and acoustic emission for investigating damage evolution and precursor of water-bearing sandstone under uniaxial compression","authors":"Tiancheng Shan ,&nbsp;Zhonghui Li ,&nbsp;Xin Zhang ,&nbsp;Xiaoran Wang ,&nbsp;Haishan Jia ,&nbsp;Enyuan Wang ,&nbsp;Quancong Zhang ,&nbsp;Yue Niu ,&nbsp;Dongming Wang","doi":"10.1016/j.ijrmms.2025.106063","DOIUrl":"10.1016/j.ijrmms.2025.106063","url":null,"abstract":"<div><div>Deep resource mining and geotechnical structures are prone to serious geological disasters in complex environments of abundant groundwater and high geostress. Comprehensive analysis of electric potential (EP) and acoustic emission (AE) from a superstatistical perspective promises predictive insights, necessitating further exploration. In this paper, to reveal the effects of different water contents and acidity, the EP and AE monitoring tests of coarse sandstone under uniaxial compression were conducted. The temporal evolution and superstatistical features of AEs and EPs were analyzed to elucidate correlations with pore-fissure parameters and mechanical properties. The impact of water content and acidity on response mechanisms of EPs and AEs was investigated by nuclear magnetic resonance (NMR), scanning electron microscope (SEM) and X-ray Diffraction (XRD) tests. Based on Tsallis entropy <em>q</em>_EP and <em>q</em>_AE, a novel muti-geophysical prediction method were proposed. The results indicate mechanical properties and AE activities decrease with increasing water content and acidity, while the average EP value enhances due to electrokinetic effect. EPs and AEs exhibit superstatistical features, and <em>q</em>_EP and <em>q</em>_AE decrease with increasing water content and acidity, correlating negatively with porosity and pore fissure dimensions. It is attributed to reduced frictional slip and rupture severity by water lubrication and chemical erosion, diminishing charge generation and elastic wave release. <em>q</em>_EP and <em>q</em>_AE vary from 1 to 3, and display drastic fluctuation after plastic stage. Then damage weighting coefficient and damage correlation coefficient proposed are used to identify the precursory of rock failure and obtain good prediction effect. These findings offer new perspectives for the prediction of geological disasters associated with water-rich environments.</div></div>","PeriodicalId":54941,"journal":{"name":"International Journal of Rock Mechanics and Mining Sciences","volume":"189 ","pages":"Article 106063"},"PeriodicalIF":7.0,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143610791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}