Results 21 to 30 of about 1,428 (157)

Proposing Regression Models to Estimate Uniaxial Compressive Strength and Elastic Modulus of the Sandstones Based on Physical Properties and Compressional Wave Velocity [PDF]

open access: yesپژوهش‌های زیرساخت‌های عمرانی, 2021
Many engineering structures have been built on the sandstones. The main purpose of this study is to estimate the uniaxial compressive strength (UCS) and modulus of elasticity (Es) of sandstones using regression models.
Amir Azadmehr   +2 more
doaj   +1 more source

CORRELATIONS OF POINT LOAD INDEX AND PULSE VELOCITY WITH THE UNIAXIAL COMPRESSIVE STRENGTH FOR ROCKS

open access: yesJournal of Engineering, 2011
Rock engineers widely use the uniaxial compressive strength (UCS) of rocks in designing surface and underground structures. The procedure for measuring this rock strength has been standardized by both the International Society for Rock Mechanics (ISRM ...
Muhammad Abdul Jabbar
doaj   +1 more source

A determination method for the shear strength of soil-rock mixture considering the size effect and its application

open access: yesFrontiers in Materials, 2022
The shear strength of the soil-rock mixture (S-RM) is the primary mechanical factor influencing the stability of the deposit slope. The particle size range inside the test sample, however, is not the same as that of the S-RM in the deposit slope due to ...
Yingbo Zhou   +5 more
doaj   +1 more source

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

Factorial Experiment Study on the Mechanical Properties of Sandstone–Concrete Specimens Under Different Freeze–Thaw Conditions

open access: yesFrontiers in Physics, 2020
The contact part between shaft wall and rock is affected by many factors, such as temperature and formation pressure, in the commonly used freezing method in coal mine development through quicksand and water-rich strata.
Tao Zhao   +4 more
doaj   +1 more source

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

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

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

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