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As stated in the introduction, seismic load can be treated as a medium and low-strain-rate dynamic cyclic loading. Therefore, the dynamic constitutive model under …
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1. Introduction. Jaw and cone crushers are commonly used in the mining and aggregates industry. Today, it is possible to predict the performance of a cone crusher, provided the geometry, crusher settings and the characteristics of the material fed into the crusher are known (Evertsson, 2000).The geometry of the crusher will change because …
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Seismic Effects of Blasting in Rock A.A. Dauetas Limited preview - 2017. Common terms and phrases. according amplitude assessing bench blast blast effect blasting operations blocks boundary buildings calculated cavities characteristics coefficient compared complex components conducted consider considerably construction cost …
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In this study, authors will be dealing with seismic effect under the influence of rock weathering in case of different shaped tunnels. There are many methods to analyze the problems, one can do it either by the experimental approach, or analytical approach or numerical approach, etc. The experimental work requires sophisticated machineries and ...
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SkyCiv Load Generator has recently added seismic load calculation in accordance with ASCE7-16. This involves integrating the USGS Seismic Data and processing it to generate the seismic base shear using Section 12.8 Equivalent Lateral Procedure. In this article, we will dive deeper into the process of calculating the seismic …
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Finally, the rock beneath and in front of the cutter is crushed under compound impact, forming a stereoscopic crushing effect, as shown in Fig. 9 (d). A crushing pit beneath the cutter with a broken depth of 1.82 mm is formed, and the total …
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The results of theoretical and experimental investigations of seismic waves depending on natural and technological factors are discussed, with methods for engineering calculations of industrial blast parameters. ... Seismic Effects of Blasting in Rock @inproceedings{Kuzmenko1993SeismicEO, title={Seismic Effects of Blasting in …
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Recent research has established that the dominant P-wave attenuation mechanism in reservoir rocks at seismic frequencies is because of wave-induced fluid flow (mesoscopic loss). The P-wave induces a fluid-pressure difference at mesoscopic-scale inhomogeneities (larger than the pore size but smaller than the wavelength, typically tens of centimeters) …
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Secondary seismic radiation is generated by rock fracture in the "damage zone" of an underground nuclear source and by frictional sliding on preexisting fractures in the "non-linear elastic zone ...
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This study presents the findings of a comprehensive geotechnical and seismic site investigation conducted at Otuasega Town located in Bayelsa State within the Niger …
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Seismic rock physics links analysis of rock and seismic properties, the former the causative and the latter the response effect. Properties of rocks and fluids, such as lithology, porosity, fractures, texture, fluid type and saturation, and viscosity etc., and factors like pressure and temperature are all known to affect seismic properties in ...
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A jointed rock mass (JRM) is the usual case in practical engineering, which has significant effects on its mechanical performance. To clarify the difference in the seismic responses of underground structures in JRM sites or homogeneous rock mass () sites, two models were prepared to take shaking table tests in a structural …
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Numerous researchers worked on classifying the post-earthquake damages in tunnels. These post-earthquake damage classifications are modified by researchers …
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Earth–rock dams are typical soil–rock mixtures with high heterogeneity. Mastering the effect of dam heterogeneity on seismic wavefields is the premise of accurately detecting hidden risks in dams. …
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Rock crushers, like the cone crushers we'll be discussing in just a moment, generate incredible force to break raw material into smaller pieces. Once material exits the crusher, the user can refine it further to …
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The theme of this study, 'Challenges in Seismic Rock Physics', focuses on recently published research and proposes new theories and applications, with the aim of presenting current advances in addressing key issues in seismic rock physics research from different fields. The collection of 10 papers mainly covers the following three …
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The sensitivity index of k h can be found in Fig. 19 b, and it is seen that the seismic effects are more significant with the increase of the horizontal and vertical seismic coefficient. Therefore, the vertical seismic effect cannot be ignored in the layered rock tunnel face stability analysis. Download: Download high-res image (238KB)
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Clearly, the porosity has a greater effect on the properties at smaller values of J. 3. Experiments. In the literature of materials sciences, there is a significant amount of investigations on the effects of porosity on the seismic properties and the effective mechanical properties (e.g. elastic moduli and strengths) of the materials.
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All rock crushers can be classified as falling into two main groups. Compressive crushers that press the material until it breaks, and impact crushers using the principle of quick impacts to crush the material. ... An additional crushing effect occurs between the compressed particles, resulting in less wear of the liners. The gyratory crushers ...
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The higher density reduces the speed of seismic waves. However, the effects of increased rigidity and compressibility in the deep mantle are much greater than the effect of the increased density. P-waves travel through materials with rigidity and/or compressiblity, and density; greater rigidity:
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@article{Guo2023DepthEO, title={Depth Effect of Rock-Breaking Seismic Source by Drilling Jumbo in Subsea Tunnel with the Drill and Blast Method and Its Application Prospects}, author={Weidong Guo and Zhenyan Tian and Shucai Li and Shao-shuai Shi and Wang Xin and Xiansen Li}, journal={Journal of Marine Environmental Engineering}, …
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Key features of Williams Rock Crushers include: The ability to crush a wide variety of materials; Durable, reliable machine construction that lasts for decades; Customized systems and designs to meet your specific needs . Benefits of Williams Rock Crushers. The rock crushers we design are versatile and can be used in a variety of industries.
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The advent of new high resolution seismic reflection and borehole sonic techniques has stimulated renewed interest in what information stress wave propagation may carry about rock properties and ...
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— In studying the physical processes involved in the generation of seismic waves by explosions, it is important to understand what happens in the region of high stresses immediately surrounding the explosion. This paper examines one of the processes that takes place in this region, the growth of pre-existing cracks, which is described …
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Seismic behaviour of tunnels: From experiments to analysis is a comprehensive review of the state-of-the-art research on the seismic performance of underground structures. The article covers various aspects of experimental, analytical and numerical methods for assessing the dynamic response of tunnels in different soil and …
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The effect of seismic discharges on rock lobsters was investigated through statistical analysis of the coincidence between seismic surveys and changes in commercial catch rates in western Victoria between 1978 and 2004. In 12 depth-stratified regions, the number of acoustic pulses during seismic surveys was correlated with catch per unit …
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In this paper, we focus on three seismic anisotropy estimation problems: (1) Determining the relationships between shale rock properties and elastic stiffness coefficients, (2) Quantifying the effects of mineralogy, pores, and solid organic matters on the anisotropy parameter changes, (3) Enhancing the elastic stiffness estimation …
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The rapid release of strain energy is an important phenomenon leading to seismic events or rock failures during the excavation of deep rock. Through theoretical …
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During the 2 to 5 s of strong seismic intensity, crack increases sharply and energy of particles fluctuates greatly. The impacts of the amplitude of seismic loading and loading method in PFC are …
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Here, we explore effects of a seismic velocity contrast between unstable and surrounding stable material by varying the elastic modulus of underlying bedrock between 10 and 90 GPa, while retaining a constant value of 10 GPa for the sliding block of the 425 m high slope. This strategy was chosen to explore the role of velocity contrasts while ...
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