Results 31 to 40 of about 6,394 (206)

Indirect test methods for the mechanical characterization of building stones [PDF]

open access: yesMATEC Web of Conferences, 2018
The main objective of this study is to evaluate the usefulness of indirect methods to estimate the uniaxial compressive strength (UCS) of building stones.
Forestieri Giulia
doaj   +1 more source

Engineering characteristics of Egyptian limestone [PDF]

open access: yes, 2019
Purpose. Study of physical properties such as porosity, density and mechanical properties such as compressive strength and tensile strength of Egyptian limestone based on experimental investigations. Methods.
Haitham, M. Ahmed, Mahrous, A.M. Ali
core   +1 more source

Mechanical properties of granulite from Horní Bory in Bohemian massif [PDF]

open access: yes, 2019
Granulite represents one of the favourite rock types for the construction of an underground nuclear waste repository in the Czech Republic. Granulite from the Bohemian Massif (locality Horní Bory) was investigated in this study, with a special focus ...
Blümel, Manfred   +4 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

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

Variations of physico-mechanical, mineralogical and geochemical properties of marble under the influence of weathering [PDF]

open access: yes, 2019
Purpose. To investigate the physico-mechanical, mineralogical and geochemical properties variations of Igbeti marble, south-western Nigeria under the influence of weathering. Methods. About twenty representative samples were collected at a varying depth
Lawal, A.I., Ogunsola, N.O., Saliu, M.A.
core   +1 more source

Use of Rock Mass Rating (RMR) values for support designs of tunnels excavated in soft rocks without squeezing problem [PDF]

open access: yes, 2019
Effect of the rock material strength on the RMR value and tunnel support designs were investigated within this study including site works, analytical and numerical analyses.
Demir, Serhat, Komurlu, Eren
core   +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

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

Empirical strength envelope for shale [PDF]

open access: yes, 2016
Effectively, strength envelope describes behavior of rock when subjected to common stresses in construction, i.e. compressive, triaxial and tensile stresses.
Abdullah, Rini Asnida   +2 more
core   +1 more source

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