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By absorbing the advanced technology from the world, we researched and designed PF series impact crusher.…
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Base on the plentiful experience of producing and marketing of impact crusher, Sofol R&D institution…
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Adopting technology from the world, PY Series spring cone crusher has an excellent performance in secondary…
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The vibrating screen is a kind of sieving equipment of international advanced level, developed by our…
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Sofol VSI Series vertical shaft impact crusher is designed by reputed German expert of Sofol and every…
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Estimation of shear strength parameters, which are generally known as the cohesion and internal friction angle ( c and φ) in the Mohr–Coulomb (M–C) strength criterion, plays an …
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Effects of the detailed design parameters such as axial clearance, contact angle, and roller semi-cone angle on the carrying capacity of the rotor slewing bearing were analyzed. The results show that right amount of small negative axial clearance, increase in contact angle, and decrease in roller semi-cone angle are advantageous for …
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Liu et al. [36] focused on the effect of geometric parameters on the spray cone angle and present an empirical formula to determine the SMD (Sauter mean diameter) of the spray. Durdina atomizers ...
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The Dynamic Cone Penetrometer (DCP) has been described by ASTM 6951-03 (2003). The typical DCP consists of an 8-kg hammer that drops over a height of 575 mm, which yields a theoretical driving energy of 45 J or 14.3 J/cm 2, and drives a 60 o cone tip with 20 mm base diameter vertically into the pavement or subgrade layer (Fig. …
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Determination of the in situ engineering properties of foundation materials has always been a challenge for geotechnical engineers and, thus, several methods have been developed so far. Dynamic Cone Penetration (DCP) test is one of the most versatile amongst them. In the present research, a light weight simple DCP device was …
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As the simulated operation of the DEM cone crusher with a real geometry is computationally too expensive, the performance of a small scale cone crusher was modelled in this study. The dimensions of the model parameters were determined based on the full scale cone crusher design geometry presented by Lang (1998).
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Abstract. The knowledge of the main mechanical constants of a rock. mass (such as strength, deformability and the Poisson' s ratio) is one of the most important for rock engineering design on or ...
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In carrying Out stability analyses, it is usually assumed that the rock behaves as a Mohr-Coulomb material in which the shear strength is expressed in terms of the cohesion and …
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The tests indicate that for the assumed mechanical parameters of rock and the depth of undercutting the rock with an anchor, the value of the angle of the cone failure is approximately 25º ...
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Crushing chambers – cones. Having a good understanding of your crushers helps you make smart, informed decisions. Whether you want to build up your knowledge or refresh your memory, this is the place to start. We take you through the basics of cone crushing to more detailed advice on chamber solutions, feed arrangements and configurations.
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the friction angle will progressively diminishe to a minimum value of the basic, or residual, friction angle of the rock. A rough surface that is initially undisturbed and interlocked will …
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At present, the roller cone bits and Polycrystalline Diamond Compact (PDC) cutter bits are widely used for breaking the rock, especially the PDC bit due to its high efficiency and longevity. The investigation of rock-breaking mechanism in cutting is essential to evaluate and design the PDC bit.
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The chamber is designed mainly to adopt the relevant optimum structure parameters. Cone crusher structural parameters are shown in Fig. 1, including material inlet B, closed side setting (CSS), length of parallel strip l, chamber geometry nip angle β nip and base angle of cone α. Previous cone crusher chamber geometry design was …
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Bit Design Method.The bit geomety and cutting structure engineering method of Bentson has since 1956 been the root from which most roller-cone bit design methods have been designed (see also Reference 1). Although modern engineering techniques and tools have advanced dramatically from those used in 1956, Bentson's …
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Cone crusher basics in 4 minutes. This is the starting point for understanding how cone crushers work – and how they can make your mine or quarry more productive. Elsewhere on the site you can find detailed information about all aspects of crushing and screening, but to make sense of these it helps to understand the basics of cone crushing.
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The PRM approach has recently been used by Lichter et al (2009) to model the rock fracture predicted within a cone crusher. However, in that study the rock particles were …
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the rock breakout prism, which tends to be approximated to a cone or a quadrilateral pyramid, including its char - acteristic parameter, the angle of failure cone α. Assuming that the embedment depth and the undercut anchor head angle were constant for the considered range of anchor head diameters, it remains unclear, however, pre -
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J. 46: 1337–1355 (2009) and sampling, because it is fast, repeatable, and economical. In addition, it provides near-continuous data and has a strong theoretical background. These advantages have led to. a steady increase in the use and application of the CPT in North America and many other places around the world.
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a standard electronic cone with a 60-degree apex angle and either a diameter of 35.7 mm or 43.7 mm (10 or 15 cm2 cross-sectional area). Recommendations are provided on applications of CPT data for soil profiling, material identification and evaluation of geotechnical parameters and design. The companion book (Lunne et al., 1997) …
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Breakout "cone" failure in rock materials (h ef —effective anchoring depth, α—the angle of the cone of destruction of the medium). According to several studies [ 12, 15 ], the value of the failure cone angle depends mainly on the effective anchorage depth h ef, the anchor head diameter and the angle of the undercutting head.
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As cohesion and internal friction angle parameters, a combination of these parameters can be found by employing back analysis. ... Stability evaluation and optimal excavated design of rock slope at Antaibao open pit coal mine, China. Int. J. Rock Mech. Min. Sci., 45 (3) (2008 Mar 31), pp. 289-302. View PDF View article View in Scopus [10] …
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In the model, parameters of cohesion and internal friction angle of rock are estimated from operational drilling data and based on these parameters, the UCS of rock is calculated. …
DetailsBased on differential geometry and gear meshing theory, a meshing model of working pitch cone and pitch cylinder of crossed beveloid gear and involute cylindrical gear transmission was established for geometric parameter design. The mounting parameters of gear pair were derived, with the addition of tooth surface equation of beveloid gear …
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However, the depth of anchoring, considering the studied range of this parameter and the assumed mechanical properties of the rock, did not have a significant effect on the value of the angle cone ...
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According to equation (17) the strength ratio Fc/Ft (or Co/To) depends on the value of m only. For limestone m=5.4 and Co/To=5.6; for granite m=29.2 and Co/To=29.2; for sandstone m=14.3 and Co/To=14.3. The Hoek and Brown criterion for intact rock can also be expressed in terms of normal and shear stresses as follows.
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Cone Penetration Test Design Parameter Correlations. This module provides Cone Penetration Test (CPT) semi-empirical correlations for geotechnical design parameters. Appropriate usage of the CPT and correlations for design depends on several factors that are discussed in this module. A brief overview of CPTs is also included. Overview of CPT.
DetailsIn general, rock mass strength depends on the strength of intact rock and the strength of rock discontinuities. In general, compared to intact rock, a rock mass has reduced …
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It is illustratel that the penetration performance of a shaped charge determines kbest values of parameters in the DiPersio, Simon, and tMerendino theory of penetration by shaped-charge jets and that it is possible to relate these penetration parameters to design parameters such as cone angle and liner thickness.. OD.
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The Fourier series expansion showed that the loads contained harmonics of the first, second, third and fourth orders. Using the concept of fuzzy sets, a multi-criteria optimization of the design parameters of the working chamber was performed, including the values of the eccentricity and the central angle of the beginning of the cheek profile.
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pacity in weak rock as follows: Effective stress method: (1) Where: Q = shaft capacity, K = coefficient of. lateral earth pressure; = effective overbur-. den stress; δ = friction angle betwee n ...
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Experimental measurements and numerical modeling (volume of fluid method) were used to investigate the effects of geometric parameters on the spray cone angle in pressure swirl injectors. The non-dimensional impact factor, η, is defined to examine the influence of each parameter on the spray cone angle. Except for the …
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The key factors which influence design for axial loading are presented and detailed descriptions are given of three appropriate design methods, together with worked examples. The implementation of Limit State design concepts for socketed piles is …
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The ratio of the volume of void space to the volume of solid substance in any material consisting of void space and solid material, such as a soil sample, a sediment, or a powder. e = Vv Vs = Vv Vt −Vv = n 1 −n (2-9) The relations between void ratio e and porosity n are: e = n 1 −n and n = e 1 +e (2-10) 2.4.3.6.
DetailsRocks have been classified on the basis of origin, mineralogical compositions and distinct physical properties and ground condition. Rock Classification provides a mutual basis of …
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Dutch Cone (60 apex angle and a ... rock with a calcium carbonate content, for normal marls, of 35–65 per cent, the ... it is necessitated to develop statistical correlations between various ...
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The standard cone tip is usually 10–15 cm 2 and has an apex angle of 60°). The cone is pushed with a standard rate of penetration of 20 ± 5 mm/s. Figure 5.3 shows the location of main components i.e. cone, sleeve and the pore pressure transducer of the probe which is pushed down by rods. The measurements taken with depth include:
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This study focuses on the silty clay of the Yellow River Delta, conducting laboratory experiments to explore the strength characteristics of typical silty clay in the Yellow River Delta. The study utilizes CPTu calibration chamber tests to systematically reveal the features of cone tip resistance (qt), side friction resistance (fs), and pore …
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