Improving the Stability of Subsurface Structures in Deep Metal Mines by Stress and Energy Adjustment: A Case Study by Huanxin Liu, Xingquan Liu, Zhuoying Tan, Yang Liu, Guilin Li

“…In deep hard-rock mines, the failure of subsurface structures (e.g., tunnels, stopes, and shafts) has been a significant problem affecting mining safety due to the high-stress environment. …”
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Assessment of groundwater potential zones using geospatial techniques in Mangalore Taluk, Dakshina Kannada District, Karnataka, India by Eka Putri Elsa, Hamidi Masyhuri, M Shet Suraj, S A Swapna

“…Groundwater occurs in weathered or semi-weathered/fractured layers in hard-rock areas whose thickness varies, generally, from 5m to 20m. …”
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Analysis on the Difference of Energy Evolution in the Process of Energy Storage Failure of Strong Coal Rush Rock Samples under Different Adaptive Modification Regulation Measures by Fangfang Zhang

“…The results show that different modification regulation measures can effectively change the physical and mechanical parameters of target rock samples and realize “hard rock softening or soft rock hardening.” Samples under different modification measures are classified as initial consolidation stage, elastic stage, stage of plastic deformation, yield failure stage, and late stage, the energy evolution is roughly the same as the sample complete natural condition, but the yield failure stage and the destruction of late stage have an obvious difference, which provides favorable conditions for impact ground pressure to prevent. …”
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Research on Mechanism of Rock Burst in Key Working Faces under Thick Magmatite in Deep Mine by WeiLi Yang, ZhiZeng Zhang, QuanDe Wei, XiaoCheng Qu, JingLin Wen

“…The rock burst of key working faces under the thick hard rock in deep mine significantly threatens the mining safety of deep mine. …”
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Creep model of bond-degradation in deep granite based on variable radius particle clump by Chunzhe Jin, Chuang Sun, Yunhe Ao, Dong Xue, Xin Lu, Qing Zhang

“…The bond-degradation creep model can better simulate the creep damage process of rocks under high stress, and is more suitable for analyzing the fracture evolution law of surrounding rock in deep hard rock cavern.…”
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Study on Presplitting Blasting the Roof Strata of Adjacent Roadway to Control Roadway Deformation by Xiaojie Yang, Chaowen Hu, Manchao He, Haohao Wang, Yubo Zhou, Xiaoyu Liu, Enze Zhen, Xingen Ma

“…Through presplitting blasting the roadway hard rock layer, the stress propagation path is cut off, and the surrounding rock stress environment of the roadway is improved, to achieve the purpose of controlling the deformation of the roadway caused by stress. …”
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Optimizing water resource management in tropical drought-prone regions through hybrid MCDM techniques: A water-stress mapping approach by Suman Mukherjee, Suman Paul, Subhasis Bhattacharya, Aznarul Islam, Sadik Mahammad, Edris Alam

“…Groundwater resources of the region are also limited due to the composition of hard rock geology and the low yield prospects of hard aquifers. …”
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Key Strata Inducing Dynamic Disasters Based on Energy Condition: Criterion and Application by Chao Xu, Gang Yang, Haoshi Sun, Liangliang Qin, Kai Wang, Bo Ren, Zhijie Wen

“…The thick and hard rock strata (THRS) exist widely in coal measure strata, which control the movements of overlying rock strata in stopes. …”
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A Study on Excavation Characteristics of Tunnel with Upper-Soft Lower-Hard Stratum by Jun Feng, Hui-juan Yang, Yu Zhang

“…The bending moment of the lining produced by the positive benching method was far less than that of the other two methods. (3) Due to the difference in lithology, the stress of the tunnel lining in the thick upper “soft” and “hard” strata was mainly concentrated on the upper soft rock area, while the stress in the lower hard rock area was relatively small, and the lining stress value generated using the three excavation methods was relatively large. …”
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Impact fracturing of rock-like material using carbon dioxide under different temperatures and pressures by Shaobin Hu, Zhengyong Yan, Chun Zhu, Manchao He, Shuogang Pang

“…It pioneers a CO2 deflagration impact triaxial pneumatic fracturing experimental system, using high-strength similar materials to simulate deep, hard rock masses. The study investigates the rock-breaking process and crack propagation patterns under supercritical CO2 thermal shock, revealing and discussing the types of thermal shock-induced fractures, their formation conditions, and discrimination criteria. …”
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Role of Subsurface Geo-Energy Pilot and Demonstration Sites in Delivering Net Zero by M. H. Stephenson, D. A. C. Manning, M. J. Spence, L. Stalker, Z. K. Shipton, A. A. Monaghan

“…Examples of test sites that have progressed technology development include the Otway International Test Centre (Australia, CCS) and the Äspö Hard Rock Laboratory (Sweden, geological radioactive waste disposal). …”
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Research on the evolution and prediction of the heights of water-conducting fracture zones in overlying rocks during layered mining of extremely thick coal seams by MENG Hailun, CHENG Xianggang, QIAO Wei

“…The research results showed that: ① During layered mining of extremely thick coal seams, the hard rock strata and inferior key strata within the capping range exhibited a hinged structure, and the overall deformation and failure of the overlying rocks presented an arched structure. ② The impact of mining activities caused the roof overlying rocks to fracture and collapse, with horizontal fractures continuously developing and vertical fractures extending upwards. …”
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Experimental study on the strengthening mechanism of carbon fiber-reinforced sand powder 3D-printed rock-like materials by Lishuai Jiang, Xin He, Ye Zhao, Pimao Li, Yang Zhao, Zongke Wang, Dingrui Guo, Qi Gu

“…However, its limitations in the strength and stiffness of the printed materials hinder its potential for hard rock simulation. Carbon fiber, which is known for its high modulus and tensile strength, is widely used in concrete reinforcement. …”
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Bridging Land and Sea: Geophysical insights into coastal karstic groundwater dynamics, freshwater plumes and saltwater intrusions in the urban regions of Antalya (Türkiye) by Jasper J.L. Hoffmann, Ercan Erkul, Simon Fischer, Irfan Yolcubal, Pritam Yogeshwar, Wolfgang Rabbel, Amir Haroon, Şerif Bariş, Ahmet Şener, Jens Schneider von Deimling, Ismail Kaplanvural, Bülent Tezkan, Elif Şen, Felix Gross, Ertan Pekşen, Elnur Gasimov, Aaron Micallef

“…The springs create distinct salinity anomalies in the water column and remove the sediment cover from the carbonate aquifer, exposing hard rock on the seafloor and creating different habitats. …”
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Theoretical and applied research on hydraulic slit-fracture joint roof control and pressure relief of hard roof in goaf roadway by Yongjiang ZHANG, Fei JI, Tongbin ZHAO, Ke YANG, Wenbin WU, Wangang JIANG

“…In order to improve the rock structure of roof plate, adjust the breaking and transporting law of hard rock layer, and then control the strong mine pressure in the adjacent roadway, this paper analyzes the distribution law of mine pressure in the mine roadway, adopts numerical simulation means to study the distribution of the support pressure in the adjacent roadway under the hard roof plate, investigates the mechanism of the peripheral rock structure transferring loads under the conditions of different roof-cutting parameters, and puts forward a joint method of cutting top plate to remove the pressure by the abrasive jet ultra-high pressure hydraulic cutting - hydraulic fracturing. …”
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Identification of failure behaviors of underground structures under dynamic loading using machine learning by Chun Zhu, Yingze Xu, Manchao He, Yujing Jiang, Murat Karakus, Lihua Hu, Yalong Jiang, Fuqiang Ren

“…Understanding the dynamic responses of hard rocks is crucial during deep mining and tunneling activities and when constructing nuclear waste repositories. …”
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La Camargue, terre d’enjeux, première étape d’une gestion intégrée des zones côtières by Hugues Heurtefeux, Provence Lanzellotti

“…It is thus absolutely necessary to prevent a "Coastal squeeze" on this emblematic land which would lead to less beach and more sprawl of concrete (groynes, hard rocks to hold the line). In this perspective, we will see how strategic principles of the coastal management were defined at the request of the Camargue Regional Natural Park. …”
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A Study on the Mechanisms of Tension-Shear Failure and the Estimation Model for Key Parameters of Free-Face-Assisted Rock Breaking by Chongmao Tang

“…One huge challenge TBM construction face is to improve the breaking ability of cutters for hard rocks, making the studies on new rock breaking approaches for cutters very important. …”
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Application of improved and efficient image repair algorithm in rock damage experimental research by Mingzhe Xu, Xianyin Qi, Diandong Geng

“…To address this issue, this paper focuses on the restoration of image data acquired through digital image technology, leveraging deep learning techniques, and using soft and hard rocks made of similar materials as research subjects, an improved Incremental Transformer image algorithm is employed to repair distorted or missing strain nephograms during uniaxial compression experiments. …”
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On the Experimental Determination of Poisson’s Ratio for Intact Rocks and Its Variation as Deformation Develops by Lu Dong, Hongfa Xu, Pengxian Fan, Zhichou Wu

“…Thus, the average Poisson’s ratio is a better index than the secant Poisson’s ratio in describing the relationship between axial and lateral strains of hard rocks. The determination of Poisson’s ratio of soft rocks needs further investigation because Poisson’s ratio tends to exceed the theoretical limit in relatively low stress levels. …”
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