Results 31 to 40 of about 1,870,275 (197)

Prediction of Uniaxial Compressive Strength (UCS) of Sakesar Limestone in Salt Range - Pakistan by Indirect Methods

open access: yes, 2020
ABSTRACT—Intact rock specimens are routinely tested in the laboratory for uniaxial compressive strength (UCS) which is an important design parameter in rock engineering. However, laboratory measurement is always expensive and time consuming and is generally not available as part of the small projects.
Farooq, Salman, Akram, Main Sohail
openaire   +1 more source

An ensemble tree-based machine learning model for predicting the uniaxial compressive strength of travertine rocks

open access: yes, 2020
Estimating the uniaxial compressive strength (UCS) of travertine rocks with an indirect modeling approach and machine learning algorithms is useful as models can reduce the cost and time required to obtain accurate measurements of UCS, which is important
Fijani, Elham   +4 more
core   +1 more source

Core crush criterion to determine the strength of sandwich composite structures subjected to compression after impact [PDF]

open access: yes, 2008
In this study a core crush criterion is proposed to determine the residual strength of impacted sandwich structures. The core of the sandwich is made of a Nomex Honeycomb core and the faces are laminated and remain thin.
Barrau, Jean-Jacques   +3 more
core   +1 more source

Research on Drilling Rate Optimization of a UCS Identification System While Drilling for Coal Mine Roadway Roofs

open access: yesMachines, 2021
In this paper, to identify the roof unconfined compressive strength (UCS) in the process of coal mine roadway support in real-time and optimize the real-time drilling speed while drilling, this paper proposes and establishes a drilling test method for ...
Guangdong Yu   +4 more
doaj   +1 more source

Influence of the water saturation for the strength of volcanic tuffs [PDF]

open access: yes, 2002
Different Hungarian volcanic tuffs (andesite, basalt and rhyolite) were investigated with the goal to determine the influence of the water on their strength.
Vásárhelyi, Balázs
core   +1 more source

Degradation of Strength and Stiffness of Sandstones Caused by Wetting-Drying Cycles: The Role of Mineral Composition

open access: yesGeofluids, 2021
Rock mechanical parameters are of great importance for the construction and design of rock engineering. Rocks are usually subjected to the deteriorating effect of cyclic wetting-drying because of the change in moisture content. The main objective of this
Lu Chen, Yichao Rui, Yihan Zhao
doaj   +1 more source

Correlation between uniaxial compressive strength (UCS) and blasting geometry on rock excavation at PT Agincourt Resources

open access: yesIOP Conference Series: Earth and Environmental Science, 2018
To achieve the set objectives, an analysis of uniaxial compressive strength and blasting geometry was used in five different rock types. Blasting is categorized successfully if the blasted material size distribution is ≤45 cm above 85%. With twenty-two times of blasting in five rock types, analyzed fragmentation distributions
D R Nainggolan   +3 more
openaire   +1 more source

Correlation between uniaxial compressive strength and point load strength of Penang Island Granites [PDF]

open access: yes, 2022
Uniaxial compressive strength (UCS) is one of the most widely used strength parameters in geotechnical design. The value is obtained through direct testing method, carried out through careful procedures of testing in a laboratory setting.
Mat Said, K. N.   +5 more
core   +1 more source

Experimental Study on Mudstone’s Strength Characteristics in Deep-Buried Coal-Measure Formation: A Case Study of Permian Longtan Formation

open access: yesShock and Vibration, 2021
To investigate the strength characteristics of mudstone in deep-buried coal-measure formation, four types of experiments have been conducted: (i) the X-ray diffraction (XRD) test; (ii) the scanning electron microscope (SEM) scanning test; (iii) the point
Ke Li   +6 more
doaj   +1 more source

Selection of Influential Microfabric Properties of Anisotropic Amphibolite Rocks on Its Uniaxial Compressive Strength (UCS): A Comprehensive Statistical Study

open access: yesJournal of Applied Mathematics and Physics, 2014
Occasionally, in complex inherent characteristics of certain rocks, especially anisotropic rocks it may be difficult to measure the uniaxial compressive strength UCS. However, the use of empirical relationships to evaluate the UCS of rock can be more practical and economical.
Esamaldeen Ali, Guang Wu
openaire   +2 more sources

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