Results 71 to 80 of about 2,581 (196)

Study on the Prediction of the Uniaxial Compressive Strength of Rock Based on the SSA-XGBoost Model

open access: yes, 2023
The uniaxial compressive strength of rock is one of the important parameters characterizing the properties of rock masses in geotechnical engineering.
Tianxing Ma   +5 more
core   +1 more source

Effect of confining pressure on fracture characteristics and mineralogical behavior of tight sandstone specimens after hydraulic fracturing

open access: yesDeep Underground Science and Engineering, Volume 5, Issue 2, Page 482-505, June 2026.
Hydraulic fracturing in tight sandstone and fracture propagation characteristics using backscattered electron‐scanning electron microscope (BSE‐SEM) images. Abstract This study focuses on hydraulic fracturing experiments conducted under triaxial conditions on tight sandstone specimens from Shivpuri district, Madhya Pradesh, India.
Pankaj Rawat, Narendra Kumar Samadhiya
wiley   +1 more source

Mechanical properties of microcrystalline branching selenite gypsum samples and influence of constituting factors

open access: yesJournal of Rock Mechanics and Geotechnical Engineering, 2019
The high sedimentological variability of gypsum rocks has the effect that a univocal characterization of this material is not easy to establish. This is particularly true from the geomechanical point of view: when the mechanical properties of gypsum ...
C. Caselle   +3 more
doaj   +1 more source

Rockburst prediction based on data preprocessing and hyperband‐RNN‐DNN

open access: yesDeep Underground Science and Engineering, Volume 5, Issue 2, Page 446-464, June 2026.
A data preprocessing workflow is proposed to address challenges in rockburst data analysis. Coupled algorithms preprocess the data set, and hyperband optimization is used to enhance RNN performance. Results show that preprocessing improves accuracy, while dense layers enhance model stability and prediction performance.
Yong Fan   +4 more
wiley   +1 more source

The determination of uniaxial compressive strength from point load strength for pyroclastic rocks

open access: yes, 2014
The point load test has often been reported as an indirect measure of compressive strength. It has been used widely in practice due to easy testing, the simplicity of specimen preparation, and possible field applications.
Kahraman, SAİR
core   +1 more source

Uniaxial compressive strength test and indirect tensile tests for four types of rocks

open access: yes, 2021
This data sets include UCS tests and indirect tensile tests for four types of rock: Alabama Marble, Bonne Terre Dolomite, Burlington Limestone, and Dunnville Sandstone. Three samples are used for the UCS and tensile tests on each rock.
Detournay, Emmanuel   +2 more
core   +1 more source

Failure characteristics and the energy criterion of rock with a through‐going joint under true‐triaxial unloading conditions: Insights from the DEM model

open access: yesDeep Underground Science and Engineering, Volume 5, Issue 2, Page 465-481, June 2026.
The rock failure mode is significantly influenced by the contributing factors, such as the joint inclination, the initial confining pressure, and the unloading point. We found six typical rock failure modes after a large number of numerical tests. Abstract Excavation unloading damages rock masses, with preferential failure along geological defects in ...
Fei Liu   +4 more
wiley   +1 more source

Impact of Sand Grain Size on the Mode I Fracture Toughness and Compressive and Tensile Strength of Artificial Sandstones

open access: yesAdvances in Civil Engineering
Texture and mineralogical composition of rocks have a significant impact on their mechanical properties. Grain size is a crucial textural property of sandstones, as it significantly influences their physical and mechanical characteristics.
Ali Lakirouhani   +2 more
doaj   +1 more source

Geological and geotechnical challenges on the Great Dyke of Zimbabwe and their impact on hardrock pillar design

open access: yesDeep Underground Science and Engineering, Volume 5, Issue 2, Page 506-538, June 2026.
The Great Dyke of Zimbabwe is notable for its rich platinum group metal deposits but poses significant geological and geotechnical challenges due to its complex rock types and structural features. Traditional pillar design methods are insufficient for addressing these complexities; the study suggests incorporating advanced techniques such as machine ...
Tawanda Zvarivadza   +3 more
wiley   +1 more source

Evaluation of the ratio between uniaxial compressive strength and Schmidt hammer rebound number and its effectiveness in predicting rock strength

open access: yes, 2015
Schmidt rebound hammer (SRH) test has been used worldwide as an index test for estimating the compressive strength and deformation characteristics of intact rocks.
Selçuk, Levent, Yabalak, Esma
core   +1 more source

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