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721
Collaborative control technology and application of support and modification for soft-rock roadway in a kilometer-deep coal mine
Published 2025-01-01“…Abstract The soft-rock roadways in kilometer-deep coal mines are often damaged by large deformation and have to be periodically expanded and repaired, which seriously restricts the safe and efficient production of coal mines. …”
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722
Failure and development height of overlying rock of a water flowing fracture in goaf under a karst aquifer
Published 2025-01-01“…This study focuses on the Longfeng Coal Mine, northern Guizhou coalfield. Samples of rock from the roof coal seam were obtained by drilling and coring and examined under a scanning electron microscope. …”
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723
The Effect of Blast-Hole Arrangement, Delay Time, and Decoupling Charge on Rock Damage and Vibration Attenuation in Multihole Blasting
Published 2022-01-01“…Rock damage and vibration attenuation are the basis of blasting design, which will affect rock breaking results and the safety of structures (buildings). …”
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724
HANNAH ARENDT E A QUESTÃO NEGRA NA DESSEGREGAÇÃO DA ESCOLA DE LITTLE ROCK, 1957
Published 2019-06-01“…O objetivo deste artigo é discutir o caso de dessegregação racial educacional acontecido na capital do Arkansas, Little Rock, nos Estados Unidos da América, em 4 de setembro de 1957. …”
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725
Change Detection and Feature Extraction of Debris-Flow Initiation by Rock-Slope Failure Using Point Cloud Processing
Published 2021-01-01“…Our understanding of debris-flow initiation by slope failure is restricted by the challenge of acquiring accurate geomorphic features of debris flows and the structural setting of the rock mass in the remote mountainous terrain. Point cloud data of debris flows in Sabino Canyon, Tucson, Arizona, July 2006, with initiation by joint-controlled rock slope were obtained using multitemporal LiDAR scanning. …”
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726
Uniaxial Experimental Study of the Deformation Behavior and Energy Evolution of Conjugate Jointed Rock Based on AE and DIC Methods
Published 2020-01-01“…Conjugate joint is one of the most common joint forms in natural rock mass, which is produced by different tectonic movements. …”
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727
Construction of Three-Dimensional Crack Calculation Method for Transparent Rock-Like Materials Based on Stereo Vision Principle
Published 2019-01-01“…Disasters of deep underground caverns often occur during excavation or operation stage, which is closely related to the growth and evolution of surrounding rock cracks. The understanding of spatial distribution of internal cracks in rock mass is the key to reveal its deformation and failure mechanism. …”
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728
A Novel Model Using Virtual State Variables and Bayesian Discriminant Analysis to Classify Surrounding Rock Stability
Published 2021-01-01“…To accurately classify the stability of surrounding rock masses, a novel method (VSV-BDA) based on virtual state variables (VSVs) and Bayesian discriminant analysis (BDA) is proposed. …”
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729
Experimental Analysis of Deformation Mechanics and Stability of a Shallow-Buried Large-Span Hard Rock Metro Station
Published 2020-01-01“…Based on a certain Qingdao metro station, a large-scale three-dimensional model test has been carried out to investigate the stability of the surrounding rock masses (hard rock) and a large-span metro station under different excavation methods and technologies. …”
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730
Geological characteristics of coal mines in the Zagros Basin of Iran: Unveiling rock mechanical properties and time-dependent behavior
Published 2025-03-01Subjects: Get full text
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731
The Influence of Moisture Content on the Time-Dependent Characteristics of Rock Material and Its Application to the Construction of a Tunnel Portal
Published 2015-01-01“…The results show that the influence of moisture and creep of the surrounding rocks is needed for estimating the deformation of complex tunnel portals.…”
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732
Mechanical Mechanism and Propagation Law of Fissure-Tip Cracks of Large-Size Rock Specimens with Two Precut Fissures
Published 2021-01-01“…The rock is a kind of geological medium with damages of different degrees including fissures, faults, joints, and other structural defects. …”
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733
Energy Evolution Law of Ore-Bearing Rock during Unloading under High Static Stress and Frequent Disturbance
Published 2020-01-01“…Based on the complex engineering environment in deep rock engineering, preloaded high axial pressure, unloading of axial pressure, and impact loading were used to simulate high in situ stress, unloading of excavation, and blasting disturbance, respectively; the experimental study on frequent impact disturbances under unloading of high static load was carried out, which aimed at revealing the energy evolution law of rock. …”
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734
Investigating the Effect of the Rock-Socketed Depth of the Hinged Cable-Anchored Pile on the Earthquake Response Characteristics of Supporting Structures
Published 2022-01-01“…The obtained results show that the rock-socketed depth significantly affects the seismic response of the pile-anchor system. …”
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735
Preliminary Study on High-Energy and Low-Energy Microfracture Event Evolution Characteristics in the Development Process of Rock Failure
Published 2020-01-01“…The evolution characteristics of high-energy and low-energy microfracture events play an important role in the brittle failure mechanism of rock and reasonable microseismic (MS) monitoring and acoustic emission (AE) monitoring. …”
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736
Recycling phosphate mine waste rocks in asphalt mixtures to fully replace natural aggregate: A preliminary study
Published 2025-03-01“…Mining activities generate large quantities of waste rocks that pose significant challenges to the environment due to their disposal in landfills, making their incorporation in asphalt mixtures a vigorous solution. …”
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737
Research on Optimal Design of Pressure Relief Blasting Parameters of Middle Rock Pillar in Near Vertical Coal Seam
Published 2022-01-01“…A presplitting blasting pressure relief technology of drilling a construction chamber in the middle of the rock column is proposed to form a buffer layer in the rock wall and effectively prevent the continuous downward movement of stress. …”
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738
Analytical Solution for Surrounding Rock Pressure of Deep-Buried Four-Hole Closely Spaced Double-Arch Tunnel
Published 2025-01-01Subjects: “…surrounding rock pressure…”
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739
Dying to be famous: retrospective cohort study of rock and pop star mortality and its association with adverse childhood experiences
Published 2012-12-01“…Objectives Rock and pop fame is associated with risk taking, substance use and premature mortality. …”
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740
Particle Flow Analysis of Macroscopic and Mesoscopic Failure Process of Salt Rock under High Temperature and Triaxial Stress
Published 2021-01-01“…In order to reveal the mechanism of thermal-induced deformation and fracture development of salt rock under high temperature, the particle flow program PFC2D was used to study the triaxial compression failure process of salt rocks under different temperatures; at the same time, a combination model of Burge and Linearpbond was proposed to simulate plastic deformation and heat conduction of salt rock. …”
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