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Artykuły w czasopismach na temat „Rocks Analysis”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 21 lutego 2023

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1

Zarraq, Ghazi. "Slope Stability Analysis of the Southwestern Limb of Kosret Anticline in Dokan, Northeastern Iraq." Iraqi Geological Journal 54, no. 2A (July 31, 2021): 34–48. http://dx.doi.org/10.46717/igj.54.2a.3ms-2021-07-24.

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The stability of the rock slopes was studied on the southwestern limb of the Kosret Anticline in the Dokan Area in northeastern Iraq to analyze and indicate the danger of rock mass failures along the public street linking Dokan and Quesangaq, Erbil and the road which link between the city and the residential neighborhood of Dokan Lake, as well as the revealing and the analysis of the risk of landslides in the slopes and rocks detectors of exposed rocks of the formations in the study area. The stereographic projection was used in the analysis and classification of the rock slopes. This study ha

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Pegu, Ajanta. "Hydrocarbon Source Rock Analysis of Barail & Disang group." International Journal for Research in Applied Science and Engineering Technology 10, no. 5 (May 31, 2022): 2305–12. http://dx.doi.org/10.22214/ijraset.2022.42814.

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Abstract: Petroleum source rocks are those which has sufficient amount of organic matter to generate and expel hydrocarbons to form a commercial accumulation of oil or gas. The objective of this project is to analyze the principal learning on the application of the formation of petroleum source rocks and hydrocarbon generation to exploration activities along with evaluation of petroleum source rocks and hydrocarbon generation. In this project, samples of Barail Group and Disang Group of rocks of Naga-Schuppen Belt were analyzed to determine their source rock characteristics and petroleum gener

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3

Lee, Dong-Keun, Duk-Ho Chung, Woong-Hyeon Jeon, and Chul-Min Lee. "Analysis of igneous rock classification process by earth science teachers using eye trackers." Korean Association For Learner-Centered Curriculum And Instruction 22, no. 15 (August 15, 2022): 461–77. http://dx.doi.org/10.22251/jlcci.2022.22.15.461.

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Objectives The purpose of this study is to find out the characteristics that earth science teachers show in the process of classifying igneous rocks and the difficulties in classifying igneous rocks. Methods To this end, the researchers collected gaze data and language data in the process of classifying igneous rocks by using a Eyetracker(Tobii Ⅱ) and a think-aloud method from five high school earth science teachers in Jeollabuk-do. Then, the collected data were analyzed using the gaze analysis program and the semantic network analysis, respectively. Results First, in the process o

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Ahrari-Roudi, Mohyeddin, and Mojtaba Zaresefat. "Armourstone Quality Analysis for Coastal Construction in Chabahar, Southeast Iran." Water 15, no. 1 (December 30, 2022): 151. http://dx.doi.org/10.3390/w15010151.

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Natural stones (armourstones) of varying sizes and qualities are frequently used to construct breakwaters to protect coastal engineering structures from wave actions for economic reasons. Time-related armourstone deterioration in the form of abrasion and disintegration may result in structural damage. Therefore, it is necessary to investigate the performance and quality of the armourstones, which should be robust and long-lasting. The study aimed to examine the quality of two distinct types of rocks from three breakwaters used as armourstones in the Chabahar region and compare the results to t

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5

Almisned, Omar A., and Naif B. Alqahtani. "Rock analysis to characterize Saudi soft sandstone rock." Journal of Petroleum Exploration and Production Technology 11, no. 6 (May 10, 2021): 2381–87. http://dx.doi.org/10.1007/s13202-021-01160-y.

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AbstractAs more engineering projects and activities are taking place on and around weak rocks, it is becoming more important to study and characterize them. Since regular practices of rock mechanical testing are not effective for weak rocks, special laboratory tests and measurements were performed to characterize the Alkharj Saudi weak sandstone rock which is a clastic rock dominantly sandy limestone and sandstone. Test results are presented in this paper. Porosity, permeability, and mechanical properties (stress, strain, Poisson's ratio, confined compressive strength and unconfined compressiv

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6

Rajapaksha, G. K. M., J. K. Clegg, K. S. A. Arachchige, A. V. R. S. Coswaththa, G. D. N. H. Gunarathna, K. M. E. P. Fernando, H. M. R. Premasiri, N. M. S. Sirimuthu, C. N. K. Patabendige, and N. M. S. Sirimuthu. "Detailed Chemical Analysis of Unusually Weathered Rocks." Indian Journal of Science and Technology 15, no. 24 (June 27, 2022): 1213–23. http://dx.doi.org/10.17485/ijst/v15i24.367.

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7

Custer, Jay F. "Experimental analysis of fire-cracked rocks from varied use contexts." North American Archaeologist 38, no. 3 (March 7, 2017): 237–91. http://dx.doi.org/10.1177/0197693117696533.

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This experimental study of fire-cracked rocks sought to determine if varied rock fracture attributes could be correlated with specific past uses of heated stones. A total of 864 rocks were heated in 41 fires that replicated hearth, stone boiling, sweat lodge, and earth oven uses of quartz, quartzite, and sandstone cobbles as heating elements. Analysis of experimental results considered three fire-cracked rock attributes (fracture rate, fragment type, and fragment shape) which can be correlated with some of the specific uses of rocks as heating elements. These attributes can be applied to fire-

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8

Safira, Amanda, Dina Yulianita, and Widya Utama. "Fluid Substitution Analysis Using Gassmann’s Equation Modification on Carbonate Environment." Pakistan Journal of Scientific Research 1, no. 2 (December 30, 2021): 8–12. http://dx.doi.org/10.57041/pjosr.v1i2.6.

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Gassmann’s equation can be used to determine the velocity of compressional waves that pass through rocks with various pore fluid contents, using fluid substitution concept, but is generally applied to certain conditions only (physical rock properties). Carbonate rock has properties in contrary of Gassmann’s assumption; is a heterogenic, anisotropic rock and does not have a well-interconnected pores. In this research, secondary data from laboratory measurements are used, consisting of carbonate rocks (limestone and dolomite) to test modified Gassmann’s equation on carbonate rocks. Two approache

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9

Ren, Jia Guo, and Qian Qian Wu. "Discussion on Geological Experiment Technology in Geological Work." Advanced Materials Research 616-618 (December 2012): 60–63. http://dx.doi.org/10.4028/www.scientific.net/amr.616-618.60.

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This essay puts silicate rocks test as example on the basic of the analysis of new technology and method of geological experiment. This essay analyses the experimental principal and process of silicate rock’s total iron content, and it based on geology experimental operation process. The essay tries to probe into silicate rock’s mineral chemical composition, rock structure and tectonics through the research of the iron content and other chemical components of silicate rocks. Furthermore, this essay also estimates the optional mineral’s component content of sandstone ore, and then evaluates min

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10

Zhang, Ke, Zi Nan Wang, Hong Sun, Jian Sun, and Yu Hou Wu. "ANSYS-Based Finite Element Analysis on TBM Disc Cutter." Advanced Materials Research 889-890 (February 2014): 66–73. http://dx.doi.org/10.4028/www.scientific.net/amr.889-890.66.

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The purpose of the essay is to know the rock fragmentation mechanism of TBM and improve the efficiency of disc cutter. The method of simulation is applied. The cutter ring and cutter axis surface stress distribution are studied under different rocks and the change of them is analyzed under different penetrations. Under different rocks conditions, the cutter ring surface stress is affected due to the change of rock load; the same rock condition, it is changed along with the change of penetrations. But the cutter axis surface stress changes little. In different rocks conditions, the change of st

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11

Liu, Shunqing, Xianwen Huang, Aizhao Zhou, Jun Hu, and Wei Wang. "Soil-Rock Slope Stability Analysis by Considering the Nonuniformity of Rocks." Mathematical Problems in Engineering 2018 (November 8, 2018): 1–15. http://dx.doi.org/10.1155/2018/3121604.

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Soil-rock slopes are widely distributed around the world, while the commonly adopted method by simplifying it as a uniform media tends to be excessively conservative. In this study, a slope stability analysis method considering the nonuniform characteristics of rocks was proposed. It was found that the distribution, relative position, and shape of rock have significant effect on slope stability. For the influence of distribution, large rocks at the foot of slope have the most significant effect on slope stability while the effect is insignificant when the rocks are on the slope surface. In ter

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12

Li, Hai Feng, Guo Xing Zhang, Tao Huang, and Qiu Jing Zhou. "Stability Analysis of Dangerous Rocks on the Slope of a Hydropower Station." Applied Mechanics and Materials 405-408 (September 2013): 621–29. http://dx.doi.org/10.4028/www.scientific.net/amm.405-408.621.

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Dangerous rocks are among the most significant factors in analyzing the stability of high slopes, and are the main geological hazards on such slopes. These rocks are typical spatial blocks. The unstable failure of dangerous rocks poses evident spatial features. Consequently, their stability should be calculated by considering it as a three-dimensional (3-D) problem. In this research, the general block method of fractured rock mass and 3-D discontinuous deformation analysis (DDA) are used to study the stability of dangerous rocks on the slope of a hydropower station. The general block method of

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13

Sabri, Mohammed M. "Chemical and Structural Analysis of Rocks Using X-ray Fluorescence and X-ray Diffraction Techniques." ARO-THE SCIENTIFIC JOURNAL OF KOYA UNIVERSITY 8, no. 1 (June 17, 2020): 79–87. http://dx.doi.org/10.14500/aro.10643.

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Rock examinations for mining and commercial use are a vital process to save money and time. A variety of methods and approaches have been used to analyze rocks and among them, X-ray fluorescence (XRF), and X-ray diffraction (XRD) techniques proved to be an accurate method. This research was conducted to evaluate the utility and reliability of XRF and XRD to analyze the major and trace elements of rocks as well as their crystalline structures. Results showed that XRF and XRD techniques are fast and reliable, nondestructive and non-invasive analytical tools for mineral analysis, particularly for

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14

Ye, Dayu, Guannan Liu, Ning Luo, Feng Gao, Xinmin Zhu, and Fengtian Yue. "Quantitative Analysis of the Topological Structure of Rock Pore Network." Geofluids 2021 (June 13, 2021): 1–11. http://dx.doi.org/10.1155/2021/5517489.

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As the most significant nonlinear reservoir, the rocks have complex structural characteristic. The pore structure of the rock is varied in shape and complex in connectivity. However, the prevailing methods for characterising the microstructure of rocks, such as the coordination number method and fractal theory, are still difficult to quantify the structural properties. In this study, based on the CT-scan method and a new complex network theory, the topological characteristics of rocks such as seepage path selection, degree of pore aggregation, pore importance, and pore module structure are ana

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15

Jahidin, LO Ngkoimani, LM Iradat Salihin, Hasria, Erzam S. Hasan, Irfan Ido, and Suryawan Asfar. "Analysis of Ultramafic Rocks Weathering Level in Konawe Regency, Southeast Sulawesi, Indonesia Using the Magnetic Susceptibility Parameter." Journal of Geoscience, Engineering, Environment, and Technology 5, no. 2 (June 24, 2020): 73–81. http://dx.doi.org/10.25299/jgeet.2020.5.2.4247.

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The Konawe region is part of the Sulawesi Southeast Arm ophiolite belt where ultramafic rocks are exposed in the form of dunite and peridotite. The formation of nickel deposits is closely related to the weathering process of ultramafic rocks as a source rock. Ultramafic rocks exposed to the surface will experience weathering which is influenced by many factors, including in the form of climate change, topography, and existing geological structures. The weathering process in the source rock can influence variations in chemical elements and magnetic properties in laterite soil profiles. Fo

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16

Liu, Kouqi, and Mehdi Ostadhassan. "Estimation of the Permeability of Rock Samples Obtained from the Mercury Intrusion Method Using the New Fractal Method." Fractal and Fractional 6, no. 9 (August 24, 2022): 463. http://dx.doi.org/10.3390/fractalfract6090463.

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Rock permeability, defined as the ability of fluid to flow through the rocks, is one of the most important properties of rock. Many researchers have developed models to predict the permeability of rock from the porosity and pore size based on the mercury intrusion. However, these existing models still have some limitations. In this study, based on data regarding the fractal nature of the mercury intrusion of the rocks, we built a new model to predict the permeability of the rocks. In order to verify the new model, we extracted data regarding different kinds of samples from the literature and e

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17

Xian-Wen, Huang, Zhi-Shu Yao, Wang Bing-Hui, Zhou Ai-Zhao, and Peng-Ming Jiang. "Soil-Rock Slope Stability Analysis under Top Loading considering the Nonuniformity of Rocks." Advances in Civil Engineering 2020 (December 16, 2020): 1–15. http://dx.doi.org/10.1155/2020/9575307.

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Soil-rock slopes are widely distributed in central or western China. With the development of transportation, many subgrades are being built on mountainsides and therefore, slope stability has to be estimated under high loadings. To obtain better estimation results, a new rock contour establishing algorithm was developed, capable of considering interlock effect between rocks. Then, computed tomography (CT) and unconfined triaxial tests with ring top loadings were conducted. Based on rock distribution characteristics (obtained by CT photos) and the appearance of shear failure surfaces in slopes

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18

Zhang, Ruofei, Guangming Zhao, Xiangrui Meng, Jian Sun, Wensong Xu, Yingming Li, Zenghui Liu, and Siming Kao. "Analysis on Characteristics of Surrounding Rocks of Roadway and Bearing Structure Based on Stress Regulation." Advances in Civil Engineering 2021 (March 20, 2021): 1–18. http://dx.doi.org/10.1155/2021/6621961.

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To address the prominent status of great deformation and difficult maintenance of the roadway under high stresses, this study investigated the mechanical characteristics of surrounding rocks and bearing structural stability in a roadway under adjustment and redistribution of stresses through theoretical analysis, numerical simulation, and engineering field test. Stability forms of the bearing structure of roadway surrounding rocks were analyzed by using the axis-changing theory from the perspectives of surrounding rock, mechanical properties of roadways, surrounding rock stress distribution, a

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19

Tawil, Sukardan, Muh Imran Syam, and Irianto Uno. "Analysis of Rock Mass Rating Classification with Using RMR Method." European Journal of Engineering and Technology Research 6, no. 1 (January 26, 2021): 133–36. http://dx.doi.org/10.24018/ejers.2021.6.1.2342.

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The looseness that occurs on the road along Tawaeli-Toboli is a very important issue to be examined because the road is the most important axis road in Central Sulawesi - Indonesia. The goal to be achieved is to know the value of the quality of the rocks and their relation to the size of the slope angle on the road, especially at km 16 to km 26 from Palu City, using the Rock Mass Rating (RMR) method. From the analysis of RMR obtained one slope whose description of rocks is poor, namely on slope 3 with a value of RMR of 28 and a medium description with a value of 51 is on slope 1, for the other

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20

Tawil, Sukardan, Muh Imran Syam, and Irianto Uno. "Analysis of Rock Mass Rating Classification with Using RMR Method." European Journal of Engineering and Technology Research 6, no. 1 (January 26, 2021): 133–36. http://dx.doi.org/10.24018/ejeng.2021.6.1.2342.

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The looseness that occurs on the road along Tawaeli-Toboli is a very important issue to be examined because the road is the most important axis road in Central Sulawesi - Indonesia. The goal to be achieved is to know the value of the quality of the rocks and their relation to the size of the slope angle on the road, especially at km 16 to km 26 from Palu City, using the Rock Mass Rating (RMR) method. From the analysis of RMR obtained one slope whose description of rocks is poor, namely on slope 3 with a value of RMR of 28 and a medium description with a value of 51 is on slope 1, for the other

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21

Andayany, Helda, and Josephus Ronny Kelibulin. "Characteristics Of Minerals With Spectroskopic IR At The Gold Mining Area Of Botak Mountain." Jurnal Fisika Indonesia 22, no. 2 (April 16, 2020): 7. http://dx.doi.org/10.22146/jfi.v22i2.41529.

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There are three rock samples that have been taken from the gold mining area of Botak mountain. The rock samples were then analyzed with spectroscopic IR to estimate the characteristic of mineral in the area. Analysis results indicate that the type of mineral found in rock samples 2 is dominated by Kaolinite, Organic Carbon, Palygorskite and Quartz. So it can be estimate the type of rock contained in that area is Quartzite. The analysis result of mineral type analysis on rock samples 1 dan 3 have similarities that is Kaolinite, Organic Carbon, Palygorskite, and Albite. So it can be estimate tha

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22

Guo, Jian, and Qi Cai Wang. "The Numerical Simulation Analysis of Excavation Process of Loess Tunnel." Advanced Materials Research 383-390 (November 2011): 6594–600. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.6594.

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The bench method dynamic construction process of Xin Baotashan tunnel which located in the grade IV surrounding rock is simulated by using the finite element method. The variation of displacement and stress field of the surrounding rocks and the internal force of the lining structures during every excavation step is calculated. The state of the surrounding rocks can be predicted by the numerical simulation results, and the construction plan and construction sequences can be guided by the analysis results. At the same time the reasonability and feasibility of the design parameters can be judged

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23

Hall, Lisa, Emmanuelle Grosjean, Irina Borissova, Chris Southby, Ryan Owens, George Bernardel, and Cameron Mitchell. "Petroleum systems analysis of the northern Houtman Sub-basin." APPEA Journal 57, no. 2 (2017): 755. http://dx.doi.org/10.1071/aj16026.

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Interpretation of newly acquired seismic data in the northern Houtman Sub-basin (Perth Basin) suggests the region contains potential source rocks similar to those in the producing Abrolhos Sub-basin. The regionally extensive late Permian–Early Triassic Kockatea Shale has the potential to contain the oil-prone Hovea Member source interval. Large Permian syn-rift half-graben, up to 10 km thick, are likely to contain a range of gas-prone source rocks. Further potential source rocks may be found in the Jurassic–Early Cretaceous succession, including the Cattamarra Coal Measures, Cadda shales and m

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Troup, Alison, and Justin Gorton. "Analysis and characterisation of petroleum source rocks in Queensland." APPEA Journal 57, no. 2 (2017): 806. http://dx.doi.org/10.1071/aj16170.

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A project to improve the understanding of petroleum source rocks across Queensland’s basins was proposed through the Industry Priorities Initiative. The study has identified new source rocks, improved characterisation of known source rocks, and examined their potential as unconventional reservoirs. Round 2 of the project sampled known source rock formations in the Adavale, Bowen, Cooper and Eromanga basins, all with proven petroleum potential. Forty-eight samples from these basins were screened through Rock-Eval and total organic carbon by LECO to determine candidates for further analysis. Pyr

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25

Wang, Jian Hua. "Study on Random Reliability Analysis of Dam Abutment." Advanced Materials Research 214 (February 2011): 218–23. http://dx.doi.org/10.4028/www.scientific.net/amr.214.218.

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Stability reliability analysis of abutment rock of arch dam is a very complicated problem which must be studied and solved. Generally, entirely sliding stability reliability analysis should be made when abutment rock bounded by structure planes like fault, joints and fissures, and layers is possible to slide. Due to the complex causes and structures, diverse litholigy, different rocks have different mechanics attributes. While the physical and mechanical parameters of the same rocks are of obvious dispersion and uncertainty. And it is also complex to calculate the pushing force at arch abutmen

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26

Asadova, G. Sh. "Analysis of cases associated with occurrence of elastic behavior of subsurface rocks while estimation of wellbore stability." Azerbaijan Oil Industry, no. 02 (February 15, 2022): 22–26. http://dx.doi.org/10.37474/0365-8554/2022-02-22-26.

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Due to the generalization of the studies on the interaction of elastic behavior of subsurface rocks and carried out static analysis, the dependence of the speed of longitudinal waves on the subsurface rocks’ density has been obtained. The dependence of Poisson coefficient on the lithologic features of the rocks has been specified. The poor interaction by the well in a whole in the dependence of Poisson coefficient on the rock density is observed. Moreover, analogical dependences developed on the data of specific rocks are characterized with the closely connected correlation.

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Wang, Guohua, Jun Tan, and Chengxiao Li. "Analysis of rock cracking characteristics during pyrolysis drilling." Thermal Science, no. 00 (2020): 322. http://dx.doi.org/10.2298/tsci200629322w.

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Thermal jet rock breaking technology refers to the use of high temperature medium such as supercritical water for a rapid local heating of rocks to break the rocks. Because of the low thermal conductivity of the rock matrix, thermal stress will only form on the rock surface. When the temperature stress exceeds the strength of the rock, micro-cracks will appear in the rock, and continue to expand, resulting in the thermal cracking on the rock surface, which will cause the rock surface to fall off from the body and break the rock. Based on thermal-solid coupling theory, a pyrolysis drilling mode

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Kılınçarslan, Şemsettin, Ebru Yılmaz İnce, Ebru Başpınar Tuncay, and Fuzuli Yağmurlu. "Clustering Analysis of Normal Strength Concretes Produced with Different Aggregate Types." Open Chemistry 16, no. 1 (October 22, 2018): 918–22. http://dx.doi.org/10.1515/chem-2018-0100.

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AbstractConcrete is the most commonly used structural material, which is composed of individual base materials. The compressive strength of concrete is important to understand for activities like construction arrangement, prestressing operations, proportioning new mixtures and quality assurance. Concrete has a problem known as Clustering, which is the unsupervised classification of patterns into clusters. The clustering problem has been addressed by several researchers in many contexts and various disciplines; this shows that clustering uses many areas and is an important step in data analysis

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Liang, Zhi Lin, and Ze Li. "Study of Lower Bound Method for Plastic Limit Analysis of Wedge on Consideration of Anchor Bolt." Applied Mechanics and Materials 444-445 (October 2013): 966–70. http://dx.doi.org/10.4028/www.scientific.net/amm.444-445.966.

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The massive rock slope is made up of rocks and structural surface. The existence and strength of the structural surface decides the stability of the rock mass. By adopting the lower bound method for the plastic limit analysis of wedge slope, we can easily calculate the stability of the rocky slope under various circumstances. To apply this method, we first took the wedge-shaped slide block as a complex of rigid block and structural surface for the analysis of the slope stress under the function of anchor bolts, the integrated function of rocks and structural surfaces being considered. Then, on

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Luo, Junhui, Yong Wu, Decai Mi, Qiongyao Ye, Haifeng Huang, Zhenchao Chang, Qinglin Chen, et al. "Analysis of the Distribution and Microscopic Characteristics and Disintegration Characteristics of Carbonaceous Rocks: A Case Study of the Middle Devonian Luofu Formation in Western Guangxi of China." Advances in Civil Engineering 2020 (August 30, 2020): 1–15. http://dx.doi.org/10.1155/2020/8810648.

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Carbonaceous rock is a special soft rock containing TOC organic carbon 6%∼40%. In order to reveal the influence of engineering characteristics of carbonaceous rock on the engineering construction, firstly the stratigraphic distribution of carbonaceous Rocks in Guangxi is investigated, and the genetic mechanism and tectonic environment of carbonaceous rocks are discussed. Secondly, the influence of pore microstructure on the disintegration characteristics of carbonaceous rocks is analyzed. The role of geochemical characteristics of carbonaceous rocks (mineral composition, TOC total organic matt

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Dias, Gilmar Pauli, and Emílio Velloso Barroso. "Determinação experimental do coeficiente de restituição normal de rochas: aplicação na previsão do alcance de blocos em encostas." Anuário do Instituto de Geociências 29, no. 2 (January 1, 2006): 149–67. http://dx.doi.org/10.11137/2006_2_149-167.

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Among the several parameters involved in rock fall analisys, the restitution coefficient, which is related to the kinetic energy wasted after repeated impacts of a rocky body against the ground, is probably the most important and most difficult to acquire. There is the necessity of in situ tests where blocks of rocks are thrown down on the slopes. However these tests cannot be performed in places where people or urban equipments could be in risk. In this paper an acoustic method is used for the measurement of the normal restitution coefficient of rocks. This method is very well known by physic

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Wang, Teng Yue, Ke Zhang, Hong Sun, Yu Hou Wu, and Kai Jun Zhao. "Analysis on the Stress and Failures of Disc Cutter of Full Face Rock Tunnel Boring Machine." Advanced Materials Research 102-104 (March 2010): 223–26. http://dx.doi.org/10.4028/www.scientific.net/amr.102-104.223.

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Full face rock tunnel boring machine (TBM) plays an important role in boring rock of tunnel. The failure of disc cutter is the main reason leading to low efficiency of TBM. In this paper, analysis of force and motion for disc cutter are carried by using ABAQUS to study stress distribution and concentration in disc cutter and rocks. Influence of different rocks on stress in disc cutter is analyzed. By combination the failure modes of disc cutter and its stress distribution, methods of decreasing failures of disc cutter are presented. Wear resistance and service life of disc cutter are improved

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Zhang, Qiu Mei, Jin Tao Tang, and Hao Ma. "Analysis between Water Contain and Lithology." Applied Mechanics and Materials 744-746 (March 2015): 422–25. http://dx.doi.org/10.4028/www.scientific.net/amm.744-746.422.

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Water content has a great influence on the rock mechanics properties. Four kinds of rock samples have been tested in the MTS Electro hydraulic Tri-axial Servo Test System. The result shows that with the increase of water content, the rock uniaxial compressive strength and elastic modulus value are declining. We get the fitting equation between water content and rock mechanical properties with four kind of rocks, provide a new basis for slope stability analysis and landslide prevention and control measures.

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Anderson, John G., and James N. Brune. "Methodology for using precarious rocks in Nevada to test seismic hazard models." Bulletin of the Seismological Society of America 89, no. 2 (April 1, 1999): 456–67. http://dx.doi.org/10.1785/bssa0890020456.

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Abstract Fields of precariously balanced rocks indicate that strong earthquake motions have not occurred at that site since the precarious rocks developed. These fields can be characterized with an estimate of the peak acceleration that would be sufficient to topple the rocks and an estimate of how long the rocks have been precarious. This article uses this information to test the input to probabilistic seismic hazard analysis. The fundamental assumption is that the probability of exceeding a ground motion capable of toppling a precarious rock during a time period equal to the age of the rock

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Chen, Yit-Jin, Cheng-Chieh Hsiao, and Anjerick Topacio. "Side Resistance of Drilled Shafts Socketed into Rocks for Serviceability and Ultimate Limit States." Advances in Technology Innovation 5, no. 3 (July 1, 2020): 156–65. http://dx.doi.org/10.46604/aiti.2020.4155.

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This study evaluates the analysis models of side resistance in rock sections by utilizing a wide variety of load test data. Available analytical models including the empirical adhesion factor versus the rock’s uniaxial compressive strength and its root are analyzed and compared statistically to determine the optimum relationships. The interpretation criteria for the L1 and L2 methods are used to analyze the load test results for serviceability and ultimate limit states, respectively. The analysis results show that the relationship model with the empirical adhesion factor versus the root of the

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Xiu, Li Jun, He Ping Pan, and Hao Xiu. "The Logging Evaluation of the Relationship between Source Rock and Oil Layer Distribution in Southern Songliao Basin." Advanced Materials Research 962-965 (June 2014): 574–77. http://dx.doi.org/10.4028/www.scientific.net/amr.962-965.574.

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At present, Most of the studies on source rocks is above the effective source rock identification and quality evaluation. But the spatial distribution of the high quality source rocks do not necessarily reflect the position of the layer. So, logging evaluation of the relationship between source rock and layer distributed in a region is necessary. In this paper 70 cores have selected from 4 wells in the first period of Qingshankou (q1), Songliao Basin, then get the experimental TOC value after core analysis. On the basis of source rock geochemical analysis, the author estimated the source rock

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Premalatha, K., S. Angammal, and K. Raja. "Behaviour of Precariously Balanced Rocks under Seismic Excitation." Disaster Advances 16, no. 2 (January 15, 2023): 7–12. http://dx.doi.org/10.25303/1602da07012.

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A naturally occurring geological formation is precariously balanced rocks (PBRs) which might easily topple by an earthquake with severe ground motion. These rocks have been at the same place for many years. Strong ground accelerations have not occurred in the area for thousands of years as shown by the zone of unstable rocks. So, they are significant in both the engineering and seismological domains since they provide source of data for the maximum earthquake ground motion occurring at a site over the rock’s life time. The precariously balanced rock taken for this study is Krishna Butter Ball

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Shine, Richard, Jonathan K. Webb, Mark Fitzgerald, and Joanna Sumner. "The impact of bush-rock removal on an endangered snake species, Hoplocephalus bungaroides (Serpentes : Elapidae)." Wildlife Research 25, no. 3 (1998): 285. http://dx.doi.org/10.1071/wr97022.

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We examined the impact of habitat degradation (removal of surface rocks) on an endangered snake species (Hoplocephalus bungaroides, Elapidae) at 23 sites in south-eastern Australia, by quantifying the impact of rock removal on (i) the availability of suitable shelter-sites for the snakes and their major prey species (the velvet gecko, Oedura lesueurii), and (ii) the numbers of snakes and geckos. Our survey showed that both the snakes and the geckos prefer rocks lying on other rocks, rather than on soil, and select rocks of particular sizes. The rocks removed by bush-rock collectors overlap con

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Thandar Phyu, Hnin, Heru Hendrayana, I. Gde Budi Indrawan, and Toshitaka Kamai. "Simulation of Kalirejo Road Side Slope based on Altered Andesite Characters, Kulon Progo Regency, Indonesia." Journal of Applied Geology 5, no. 2 (January 18, 2021): 101. http://dx.doi.org/10.22146/jag.56916.

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ABSTRACT. This study is performed to investigate the characteristics of intrusive andesite rock consisting of Kalirejo Road Side Slope located in Kulon Progo Mountains. The rocks consisting the slope are identified by visual observation of hand specimens in the field, petrographic and X-ray Diffraction (XRD) analyses of the rock samples in the laboratory, upon which genetic rock classification is determined. The altered rock types are determined by the presence of specific minerals identified in the petrographic and XRD analyses. The alteration intensity is examined by comparing the amount of

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Al-Jawadi, Azealdeen. "Theoretical Models of Slope Stability Analysis in The Maqlub Mountain Rock Cut Routes, North Iraq." Iraqi Geological Journal 54, no. 1A (January 31, 2020): 55–68. http://dx.doi.org/10.46717/igj.54.1a.6ms-2021-01-27.

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In many sections, the road leading up to the top of Maqlub Mountain is dangerous due to the fall of several rocks. There were six locations recognized for this dynamic geological process, rockfalls of varying sizes, with very large measurements up to 230 x 120 x 110 cm are falling on the road. The study suggested three theoretical models explain the causes of rockfall, through a ‎comprehensive study in the area. The first model showed that the cause of rockfall was the presence ‎of rocky slopes with a reverse slope. The second model has shown that the rockfall is caused by weak engineering pro

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Palu, Tehani, Lisa Hall, Emmanuelle Grosjean, Dianne Edwards, Nadege Rollet, Karen Higgins, Christopher Boreham, et al. "Integrated petroleum systems analysis to understand the source of fluids in the Browse Basin, Australia." APPEA Journal 57, no. 2 (2017): 781. http://dx.doi.org/10.1071/aj16191.

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The Browse Basin is located offshore on Australia’s North West Shelf and is a proven hydrocarbon province, hosting gas with associated condensate in an area where oil reserves are typically small. The assessment of a basin’s oil potential traditionally focuses on the presence or absence of oil-prone source rocks. However, light oil can be found in basins where source rocks are gas-prone and the primary hydrocarbon type is gas-condensate. Oil rims form whenever such fluids migrate into reservoirs at pressures less than their dew point (saturation) pressure. By combining petroleum systems analys

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Park, Keunbo, Kiju Kim, Kichoel Lee, and Dongwook Kim. "Analysis of Effects of Rock Physical Properties Changes from Freeze-Thaw Weathering in Ny-Ålesund Region: Part 1—Experimental Study." Applied Sciences 10, no. 5 (March 2, 2020): 1707. http://dx.doi.org/10.3390/app10051707.

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In order to investigate the weathering characteristics of rocks in response to freeze-thaw conditions in northern latitudes, we analysed meteorological data from the Ny-Ålesund region in Norway, and observed changes in the physical and mechanical properties of rocks of dolomite and quartzite. To assess the effects of freeze-thaw weathering on these rock properties, 900 cycles of long-term freeze-thaw tests were conducted for the sampled rocks in two locations. P-wave velocity, absorption, shore hardness, and the uniaxial compressive strength of the sampled rocks were measured at every 150 cycl

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Seoung, Donghoon, Pyosang Kim, Hyeonsu Kim, Hyunseung Lee, Min Huh, Hyunwoo Lee, and Yongmoon Lee. "Mineralogy of the Mudeungsan Tuff (Republic of Korea) Using Synchrotron X-ray Powder Diffraction and Rietveld Quantitative Analysis." Applied Sciences 11, no. 22 (November 15, 2021): 10796. http://dx.doi.org/10.3390/app112210796.

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Mudeungsan (Mount Mudeung) is an extinct volcano located in the southwestern part of South Korea that was formed in the Late Cretaceous period. This mountain, 1187 m above sea level, is adjacent to Gwangju Metropolitan City, which has a large population (about 1.4 million) and volcanic rocks, including columnar joints, which form various types of outcrops. Although this mountain was listed as a national geopark in 2014 and a UNESCO Global Geopark in 2018, much basic research has yet to be carried out. In particular, there are no mineralogical studies of volcanic rock samples despite the well-p

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Shu, Jiaming, Lishuai Jiang, Peng Kong, and Qingbiao Wang. "Numerical Analysis of the Mechanical Behaviors of Various Jointed Rocks under Uniaxial Tension Loading." Applied Sciences 9, no. 9 (May 1, 2019): 1824. http://dx.doi.org/10.3390/app9091824.

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In a complex stress field of underground mining or geotechnical practice, tension damage/failure in rock masses is easily triggered and dominant. Unlike metals, rocks are generally bi-modularity materials with different mechanical properties (Young’s modulus, etc.) in compression and tension. It is well established that the Young’s modulus of a rock mass is directly related to the presence of the fracture or joint, and the Young’s modulus estimation for jointed rocks and rock masses is essential for stability analysis. In this paper, the tensile properties in joint rocks were investigated by u

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Khaustova, Nadezhda, Elena Kozlova, Polina Maglevannaia, Andrey Voropaev, Evgenia Leushina, and Mikhail Spasennykh. "Uranium in Source Rocks: Role of Redox Conditions and Correlation with Productivity in the Example of the Bazhenov Formation." Minerals 12, no. 8 (July 31, 2022): 976. http://dx.doi.org/10.3390/min12080976.

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The paper reports comprehensive analysis of different factors affecting uranium content in oil source rocks and the relationship between uranium content and productivity of source rocks. The analysis of data for 13 wells of the Bazhenov Formation (Western Siberia, Russia) was carried out. The uranium content of the rocks was measured by gamma-ray spectrometry on core samples. In order to analyze factors affecting uranium accumulation in source rocks, we studied content and characteristics of organic matter (Rock-Eval pyrolysis), and also mineral, element, and isotope composition of rocks. We h

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Hasria, Febiyanti, Masri, Ali Okto, Erzam S. Hasan, La Hamimu, Sawaludin, La Ode Muhammad Iradat Salihin, and Wahab. "Serpentinization Study On Ultramafic Rock at Morombo Area, Lasolo Islands District, North Konawe Regency, Southeast Sulawesi, Indonesia." Journal of Geoscience, Engineering, Environment, and Technology 7, no. 1 (March 30, 2022): 15–20. http://dx.doi.org/10.25299/jgeet.2022.7.1.6643.

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The research is in Morombo area, North Konawe Regency, Southeast Sulawesi. The purpose of this study was to determine the characteristics of serpentinized ultramafic rock and serpentine paragenesis. Research was conducted using field observations and laboratory analysis consisting of petrographic and geochemical analysis in the form of X-Ray Fluorosence (XRF). Petrographic analysis was carried out to identify the mineral content and textures in the rock and to determine the percentage of serpentine mineral presence. Both of these rocks are petrographically dominated by primary minerals olivine

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Matsitsi, S. M., J. M. Linturi, J. M. Kebwaro, and L. M. Kirago. "RADIOMETRIC SURVEY OF THE TYAA RIVER SAND MINE IN KITUI, KENYA." Radiation Protection Dosimetry 188, no. 4 (January 14, 2020): 405–12. http://dx.doi.org/10.1093/rpd/ncz300.

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Abstract Gamma spectroscopic analyses of sand and rock samples from Tyaa River report an average activity concentration of 33 ± 1, 55 ± 2.8 and 812 ± 40.46 Bqkg−1 for 226Ra, 232Th and 40K, respectively in the sand. A similar analysis of rock samples reveals a mean of 21 ± 2.47, 49 ± 2.47 and 782 ± 39.13 Bqkg−1 for 226Ra, 232Th and 40K, respectively. The absorbed dose rate in rocks averaged 75 ± 3.78 nGyh−1, while in the sand was 86.2 ± 4.31 nGyh−1. The ranges and mean radiological hazard indices (radium equivalent, internal and external) were within the permissible limits and the use of sand a

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HIRABAYASHI, Kenji. "Characteristics of Rock-Eval Analysis of Carbonates Source Rocks and of Petroleum Derived from Carbonate Source Rocks." Journal of the Japanese Association for Petroleum Technology 56, no. 3 (1991): 222–31. http://dx.doi.org/10.3720/japt.56.222.

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Tsibaev, Sergey, Alexey Renev, Rinat Zainulin, and Alexander Kucherenko. "Analysis of rock mass and anchor support elements deformations during the long-term maintenance of mine workings." E3S Web of Conferences 174 (2020): 01001. http://dx.doi.org/10.1051/e3sconf/202017401001.

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The results of instrumental and visual assessment of near-rock massif and anchor support elements state in the conditions of long-term maintenance of mine workings has been presented. Particular attention is paid to underground mines in a flooded state. The result of various profiles fixing bolts strength tests of in the roof and sides of the workings has been presented. It has been established that the probability distribution of the anchoring bolts force in the holes in roof of the workings obeys the normal distribution tendency. The result of a radar survey of roof rocks using the Georadar

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Demarco, Larissa Felicidade Werkhauser, Antonio Henrique da Fontoura Klein, and Jorge Antonio Guimarães de Souza. "Marine substrate response from the analysis of seismic attributes in CHIRP sub-bottom profiles." Brazilian Journal of Oceanography 65, no. 3 (September 2017): 332–45. http://dx.doi.org/10.1590/s1679-87592017124306503.

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Abstract This paper presents an evaluation of the response of seismic reflection attributes in different types of marine substrate (rock, shallow gas, sediments) using seafloor samples for ground-truth statistical comparisons. The data analyzed include seismic reflection profiles collected using two CHIRP subbottom profilers (Edgetech Model 3100 SB-216S), with frequency ranging between 2 and 16 kHz, and a number (38) of sediment samples collected from the seafloor. The statistical method used to discriminate between different substratum responses was the non-parametric Kruskal-Wallis analysis,

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