Results 1 to 10 of about 25,399 (164)

Measurement of Rock Joint Surfaces by Using Smartphone Structure from Motion (SfM) Photogrammetry [PDF]

open access: yesSensors, 2021
The measurement of rock joint surfaces is essential for the estimation of the shear strength of the rock discontinuities in rock engineering. Commonly used techniques for the acquisition of the morphology of the surfaces, such as profilometers and laser ...
Pengju An   +4 more
doaj   +4 more sources

Damage law and mechanism of coal-rock joint structure induced by liquid nitrogen at low temperature [PDF]

open access: yesScientific Reports, 2022
The width and degree of connectivity of coal-rock joints directly affect the seepage capacity of flow energy such as gas. To study the damage law and mechanism of the coal-rock joint structure under the action of liquid nitrogen, two methods of liquid ...
Hewan Li   +4 more
doaj   +2 more sources

Composite filter-based detection of rock joints from drilling parameters [PDF]

open access: yesScientific Reports
In geotechnical engineering, rock joints are the key factor in determining the stability of rock. Quickly and accurately identifying the joints in the rock has always been a concern in geotechnical research. A drilling experiment was designed for jointed
Jianjun Tong   +4 more
doaj   +2 more sources

Influence of Parallel-Joint Position on Mechanical Behavior and Acoustic Emission Characteristics of Rock Pillar

open access: yesShock and Vibration, 2021
In this paper, the parallel-joint rock column model is established based on PFC software, and the effects of different joint positions on the mechanical properties, acoustic emission characteristics, and damage evolution characteristics of rock columns ...
Pei Zhang   +3 more
doaj   +1 more source

Experimental study on normal deformation characteristics of filled rock joints with typical fluctuation morphology

open access: yesFrontiers in Earth Science, 2023
The uneven deformation of filled rock joints subjected to ground stress can easily cause instability in engineering rock masses. Fluctuations in morphology and filling are the main factors affecting the normal deformation of filled rock joints.
Zhanyou Luo   +6 more
doaj   +1 more source

MATHEMATICAL DETERMINATION OF ROCK JOINTS MORPHOLOGICAL PROFILE

open access: yesRudarsko-geološko-naftni Zbornik, 2022
Determining the geometric or morphology and mechanical properties of joints and geomechanics of intact rock is a vitally important issue in predicting the behaviour of structures built inside or on rock masses. The joint morphology is significant because
Jamal Zadhesh, Abbas Majdi
doaj   +1 more source

Seismic response of rock joints and jointed rock mass [PDF]

open access: yes, 1996
Long-term stability of emplacement drifts and potential near-field fluid flow resulting from coupled effects are among the concerns for safe disposal of high-level nuclear waste (HLW). A number of factors can induce drift instability or change the near-field flow patterns.
Ghosh, A.   +2 more
openaire   +2 more sources

Experimental study on shear performance of saw-tooth rock joint with weak interlayer under different moisture contents and filling degrees

open access: yesFrontiers in Earth Science, 2023
Rock joints are important factors affecting natural disasters such as landslides, and weak interlayer is the decisive factor for rock joint stability. Therefore, it is necessary to carry out shear test research on rock joints with weak interlayer.
Zhanyou Luo   +6 more
doaj   +1 more source

Efficient and Controllable Synthesis of 1-Aminoanthraquinone via High-Temperature Ammonolysis Using Continuous-Flow Method

open access: yesMolecules, 2023
Anthraquinone dyes are the second most important type of dyes after azo dyes. In particular, 1-aminoanthraquinone has been extensively utilized in the preparation of diverse anthraquinone dyes. This study employed a continuous-flow method to synthesize 1-
Feng Zhou   +8 more
doaj   +1 more source

Effect of Joint Density on Rockburst Proneness of the Elastic-Brittle-Plastic Rock Mass

open access: yesShock and Vibration, 2021
The prediction of rockburst proneness is the basis of preventing and controlling rockburst disasters in rock engineering. Based on energy theory and damage mechanics, the quantitative functional relationship between joint density and energy density was ...
Jiliang Pan, Fenhua Ren, Meifeng Cai
doaj   +1 more source

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