Compressive–tensile rock markings

Bednarik, Robert G.

doi:10.1017/s0016756819001079

Cited by 3 publications

(3 citation statements)

References 10 publications

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“…Unfortunately, the cause of this phenomenon has not yet been established, in contrast with various other such natural occurrences that resemble petroglyphs (e.g. Bednarik 1994Bednarik , 2019.…”

Section: Natural and Incidental Rock Markingsmentioning

confidence: 99%

Petroglyphs of Victoria

Bednarik¹

2020

Proc. R. Soc. Vic.

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Victorian rock art in its Australian context is considered, focusing on petroglyphs and the natural markings mistaken for rock art. Nearly all known Victorian petroglyphs occur in limestone caves, with only three minor sites currently reported to be above ground. These occurrences are described briefly, and an explanation of their distribution in the context of Tasmanian and mainland rock art suites is attempted.

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Section: Natural and Incidental Rock Markingsmentioning

confidence: 99%

Petroglyphs of Victoria

Bednarik¹

2020

Proc. R. Soc. Vic.

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“…The foundation of the model presented herein is the rock fracturing theory [22], which provides constitutive relationships between rock and explosive properties for estimating the length and density of blast-induced fractures. The tensile nature of radial fractures is investigated numerically [23] and in practical identification [24]. The length of radial tension fractures that fall in a specific density zone is calculated according to the following relationship [22]: For a blasthole with radius r h = 0.051 m and pressure in granite with a tensile strength of σ t = 14 MPa and Poisson's ratio ν = 0.25, the cracking zones are as presented in Figure 2.…”

Section: Fragmentation Mechanismmentioning

confidence: 99%

Development and Validation of Universal 3D Blast Fragmentation Model

Lapčević,

Torbica,

Stojanović

et al. 2023

Applied Sciences

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The dominant technology in hard rock mining is drilling and blasting; therefore, the importance of fragment size estimation is an essential problem in the mining industry. By using a theoretical foundation that explains rock-fracturing mechanisms by blasting, a 3D fragmentation model with general applicability was developed. The main capabilities of the model are the ability to consider different and complex blasting patterns, both with parallel and non-parallel boreholes, and different explosive and rock properties. The geological input of the model is defined by generating the primary blocks within rock mass using discrete fracture networks. The model handles different, complex geological setups and blasting scenarios that include bench, ring, and tunneling blasting. Also, it considers borehole deviation, misfires, and the influence of previous blasts. Full-scale ring blasts were carried out to validate the model against real-world data, and the results showed a high level of agreement between model predictions and in situ data. In situ data were collected using image processing methodology and WipFrag v4 software. X50 and X80 size values showed a maximum error in prediction of around 15%, while R2 values between fragmentation curves were approximately 90% without a detailed model calibration to the obtained data.

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“…With the advancement of science and technology, Web technology has also entered the peak period of development. With the continuous expansion of business volume, some business systems or ordinary website processing capabilities have been fully tested [4,5].…”

Section: Numerical Model Of Rock Tensilementioning

confidence: 99%

Experimental Study on Damage and Fracture of Rock-like Mass Based on Intelligent Data Analysis

Jiang

Hou

et al. 2022

Security and Communication Networks

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Rock-like damage and fracture are a common geological phenomenon. It not only affects the construction quality and safety of the project but also affects the economic benefits. This study uses the finite element method to calculate the numerical simulation of rock. Therefore, we must study and explore it to improve the success rate and efficiency of drilling under such problems. This study conducts systematic analysis through experimental research on the theoretical knowledge of internal failure and stability of rock-like masses and other related finite element methods. On the basis of predecessors, combined with the professional knowledge I have learned, a set of relatively complete solutions is proposed. This study mainly uses the experimental analysis method and data collection method to study cloud computing related technology and finite element method, rock tensile fracture, and numerical model. According to the experiment, it can be concluded that the degree of rock crack development gradually increases with age. In the early and late stages of stretching, the rock mass will be significantly enhanced by the stress concentration.

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Compressive–tensile rock markings

Cited by 3 publications

References 10 publications

Petroglyphs of Victoria

Petroglyphs of Victoria

Development and Validation of Universal 3D Blast Fragmentation Model

Experimental Study on Damage and Fracture of Rock-like Mass Based on Intelligent Data Analysis

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