The Research on Tailings Dam Material Physical and Mechanical Properties

2013 ◽  
Vol 448-453 ◽  
pp. 1265-1268
Author(s):  
Feng Xia Li
Keyword(s):  
Mechanical Properties ◽  
Damping Ratio ◽  
Physical And Mechanical Properties ◽  
Dynamic Shear Modulus ◽  
Tailings Dam ◽  
Test Results ◽  
Modulus Ratio ◽  
Systematic Analysis ◽  
Characteristics Analysis ◽  
Dam Stability

In this paper, the tailings dam material physical and mechanical properties of Jilin Banmiaozi Gold Mining Co., Ltd. is studied by using of penetration test, compression test, triaxial test, dynamic shear modulus ratio and damping ratio. According to the test results, the physical and mechanical material experimental data and the experimental curve for the materials are described. These data and curves can provide available basis for systematic analysis, mechanical characteristics analysis of dam materials and seismic dam stability analysis.

Research on the Dynamic Deformation Characteristics of Tailings Silt in Zhuziqing Tailings Dam

2012 ◽  
Vol 524-527 ◽  
pp. 459-465
Author(s):  
Jian Bin Xie ◽  
Wen Lian Liu ◽  
Lin Hua Shi ◽  
Guo Hai Zhang ◽  
Jie Zhang
Keyword(s):  
Mechanical Properties ◽  
Shear Modulus ◽  
Damping Ratio ◽  
Physical And Mechanical Properties ◽  
Dynamic Strength ◽  
Confining Pressure ◽  
Standard Penetration Test ◽  
Dynamic Shear Modulus ◽  
Tailings Dam ◽  
Dynamic Shear

In this paper, it has been studied that types and mechanical properties of tailings silt in Zhuziqing tailings dam based on the Zhuziqing tailings’ deposition characteristics, particles size distribution test, physical and mechanical properties test. Then it has been studied subsequently by the dynamic triaxial test, wave velocity test and standard penetration test for tailings silt that the dynamic characteristics, dynamic strength and vibration liquefaction of the tailing silt. Results show that the tailings silt in tailings pond is graded well. Under the condition of isotropic or anisotropic consolidation, dynamic shear modulus of tailings silt increase as the dynamic shear strain decreasing and increase as the increase of confining pressure or consolidation ratio. But the variation law on damping ratio of tailings silt is just opposite to that of dynamic shear modulus. Results also show that there is more liquefied possibility over the seventh sub-dam in the tailings dam, and the liquefied possibility position locates at the place from new sub-dam to deposited beach in tailing pond.

scholarly journals Properties of High-Strength Flowable Mortar Reinforced with Palm Fibers

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Eethar Thanon Dawood ◽  
Mahyuddin Ramli
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Physical And Mechanical Properties ◽  
High Strength ◽  
Test Results ◽  
Palm Fiber ◽  
Toughness Index ◽  
Strength And Toughness

This study was conducted to determine some physical and mechanical properties of high-strength flowable mortar reinforced with different percentages of palm fiber (0, 0.2, 0.4, 0.6, 0.8, 1.0, 1.2, 1.4, and 1.6% as volumetric fractions). The density, compressive strength, flexural strength, and toughness index were tested to determine the mechanical properties of this mortar. Test results illustrate that the inclusion of this fiber reduces the density of mortar. The use of 0.6% of palm fiber increases the compressive strength and flexural strength by about 15.1%, and 16%, respectively; besides, the toughness index (I5) of the high-strength flowable mortar has been significantly enhanced by the use of 1% and more of palm fiber.

Shear Modulus and Damping Ratio of Gravel Material

2011 ◽  
Vol 105-107 ◽  
pp. 1426-1432 ◽  
Author(s):  
De Gao Zou ◽  
Tao Gong ◽  
Jing Mao Liu ◽  
Xian Jing Kong
Keyword(s):  
Shear Modulus ◽  
Shear Strain ◽  
Strain Amplitude ◽  
Damping Ratio ◽  
Confining Pressure ◽  
Dynamic Shear Modulus ◽  
Test Results ◽  
Dynamic Shear ◽  
Data Points ◽  
Shear Strain Amplitude

Two of the most important parameters in dynamic analysis involving soils are the dynamic shear modulus and the damping ratio. In this study, a series of tests were performed on gravels. For comparison, some other tests carried out by other researchers were also collected. The test results show that normalized shear modulus and damping ratio vary with the shear strain amplitude, (1) normalized shear modulus decreases with the increase of dynamic shear strain amplitude, and as the confining pressure increases, the test data points move from the low end toward the high end; (2) damping ratio increases with the increase of shear strain amplitude, damping ratio is dependent on confining pressure where an increase in confining pressure decreased damping ratio. According to the test results, a reference formula is proposed to evaluate the maximum dynamic shear modulus, the best-fit curve and standard deviation bounds for the range of data points are also proposed.

Experimental Study on the Engineering Characteristics of Improved Soil

2010 ◽  
Vol 168-170 ◽  
pp. 1426-1431
Author(s):  
Zhi Qing Li ◽  
Zhen Dong Cui ◽  
Yan Ping Wang ◽  
Li Chao Wang ◽  
Duo Zhong
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Fly Ash ◽  
Physical And Mechanical Properties ◽  
Hybrid Structure ◽  
Strength Characteristics ◽  
Shanxi Province ◽  
Hydration Reaction ◽  
Test Results ◽  
Shearing Strength

According to the typical loess in Shuozhou in Shanxi province, tests involved in compaction characteristics, shearing strength characteristics and disintegration are carried out by using loess and three kinds of improved loess, namely lime and fly-ash, lime and cement, cement and fly-ash. The best improved soil method is selected. The test results indicate that the compact hybrid structure is formed by fly ash and loess. The activity of fly ash is activated as a result of the lime mixing. A series of hydration reaction prompt the intensity of modified loess. And the physical and mechanical properties of improved loess are improved noticeably.

APPLICATION OF ADDITIVE TECHNOLOGIES IN THE TECHNICAL SERVICE OF GARDEN EQUIPMENT

2020 ◽  
pp. 39-44
Author(s):  
ALEKSEI S. DOROKHOV ◽  
◽  
ALEKSEI S. SVIRIDOV ◽  
Keyword(s):  
Mechanical Properties ◽  
3D Printing ◽  
Physical And Mechanical Properties ◽  
Additive Technologies ◽  
3D Printer ◽  
Technical Service ◽  
Test Results ◽  
Standard Samples ◽  
Sliding Bearings ◽  
Equipment Failures

The paper considers the analysis of the market for garden equipment. The authors consider some information on garden equipment failures, using an example of Husqvarna trimmers. They also assess a possibility of using additive technologies to manufacture sliding bearings for mechanical drives of garden equipment. For testing the physical and mechanical properties, a batch of samples was prepared by means of 3D printing using FDM (FFF) technology. According to the ASTM D638-14 standard, samples were prepared on a PICASO 3D Desingner X Pro 3D printer. Samples were made of ABS-plastic and PA12 with diff erent degrees of fi lling: 20, 50 and 100%. It is noted that the destruction pattern of samples made of diff erent materials is signifi cantly diff erent. Samples made from ABS plastics are more fragile than samples made from PA12. According to the test results, PA12 with 100% fi lling have shown the best results, which makes them suitable for use in the manufacture of slide bearings by means of 3D printing.

scholarly journals Research on the Overtopping-Induced Breaching Mechanism of Tailings Dam and Its Numerical Simulation

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Zhao Deng ◽  
Shiqiang Wu ◽  
Ziwu Fan ◽  
Zhikun Yan ◽  
Jingxiu Wu
Keyword(s):  
Mechanical Properties ◽  
Limit Equilibrium ◽  
Physical And Mechanical Properties ◽  
Test System ◽  
Tailings Dam ◽  
Tailings Dams ◽  
Flow Limit ◽  
Dam Breaching ◽  
Horizontal Expansion ◽  
Centrifugal Model

The centrifugal model test system is utilized to reappear the breaching process of a tailings dam. The results show that there are significant differences in breaching processes between tailings dams and earth-rockfill dams. Influenced by the special physical and mechanical properties of tailings, the breaching processes of tailings dams are of short duration, and the flood flow through the breach increase rapidly. Based on the centrifugal test results, considering the special physical and mechanical properties of tailings, a mathematical model for tailings dam breaching is established. In the model, the vertical undercutting and horizontal expansion are simulated utilizing the erosion rate formula which is derived from shear stress principle of water flow; limit equilibrium method is used to analyze the breach slope stability. In addition, the model adopts iterative calculation method to simulate the whole breaching process. The analysis results show that, the proposed model is applicable in modeling the dam breaching process for tailings dam due to overtopping.

Analysis of Physical and Mechanical Properties of Backhoe’s Bucket Repairment with Cladding Methode

2020 ◽  
Vol 841 ◽  
pp. 254-258
Author(s):  
Yustiasih Purwaningrum ◽  
Muhammad Hafiz ◽  
Risky Suparyanto
Keyword(s):  
Mechanical Properties ◽  
Bending Strength ◽  
Welding Process ◽  
Physical And Mechanical Properties ◽  
Hardness Test ◽  
Raw Material ◽  
Bending Test ◽  
Basic Material ◽  
Test Results ◽  
Low Carbon

Buckets are the most important component in backhoe construction, the bucket functions as a digger and carrier component in an excavator. Due to the heavy working media of the excavator so that this component is the most easily damaged part, damage that often occurs is wear caused by friction arising so that the thickness of the bucket is reduced which can eventually cause cracks in the bucket and in continuous use can cause the bucket to crack and broken. Cladding method is done to shorten the time or simplify the repair process is to directly patch the damaged part with a welding layer and then do the grading using a grinding. This study aims to determine the physical and mechanical properties of the material from the cladding process when compared with the raw material, the variations used are raw material, cladding with filler welding, and cladding with plates. The welding process is carried out with GMAW (Gas Metal Arc Welding) and low carbon steel. Welding results will be tested tensile strength, bending strength , impact test, hardness test, chemical composition, and corrosion rate. From the hardness test results showed that the weld metal from plate variation has the highest hardness value of 443 VHN. From the results of tensile testing the basic material has the highest value with 359.08 MPa. From the bending test results the highest value obtained from filler verification with 494.01 Mpa and the highest impact price obtained from the plate variation cladding method with a value of 1.49 J / mm2

Distribution and verification of Quaternary deposits in the Cairo Area

1991 ◽  
Vol 7 (1) ◽  
pp. 533-540
Author(s):  
M. A. El-Sohby ◽  
S. O. Mazen
Keyword(s):  
Mechanical Properties ◽  
Historical Development ◽  
Soil Mechanics ◽  
Research Work ◽  
Physical And Mechanical Properties ◽  
Complete Agreement ◽  
Test Results ◽  
River Nile ◽  
Quaternary Deposits ◽  
Combined Impact

AbstractIn previous research studies, the combined impact of the morphology of the surface, the River Nile and its changes, and the geological, environmental and historical development in the Cairo area, were considered. As a result, characteristic regions of soil formations were identified and classified by their origin, and their distribution produced on maps.In present research work, the authors have examined a large number of borehole records to verify the previous Classification. These boring records were simplified and subsoil section drawn at different locations.It was found that the simplified borehole records and subsoil sections are in complete agreement with the distribution of soils based on their origin. Thus, typical profiles representing classified types in Cairo area could be drawn and related to the stratigraphical sequence.In order to fully appreciate the nature of alluvial and deltaic deposits in the Cairo area, important physical and mechanical properties of each sublayer of the defined soil formations were determined. This was done on the basis of soil mechanics test results of natural samples.

Particleboard Manufactured with Variation of Press Time

2015 ◽  
Vol 1088 ◽  
pp. 644-647
Author(s):  
Cristiane Inácio de Campos ◽  
Bruno Santos Ferreira ◽  
André Luis Christoforo ◽  
Francisco Antonio Rocco Lahr ◽  
Juliana Cortez Barbosa ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Mechanical Tests ◽  
Modulus Of Rupture ◽  
Test Results ◽  
Thickness Swelling ◽  
Mean Values ◽  
Tukey Test ◽  
Press Time ◽  
Brazilian Standard

This research aimed to produce and determine physical and mechanical properties of three-layered particleboard produced with Pinussp. wood particlesand three different times of press, i.e., 3, 5 and 7 minutes. Recommendations of the Brazilian standard ABNT NBR 14810 [1] were adopted to fundament physical and mechanical tests. The properties evaluated were the modulus of rupture (MOR) and modulus of elasticity (MOE) in static bending; internal bond; thickness swelling; water absorption; moisture content and apparent density.The mean values showed, for the physical properties, that all the panels manufactured achievedthe requirements of theBrazilian standard, and for mechanical properties, only the panelsmanufacturedwith 7minutesofpressing timemet therequirements. From the Tukey test results, timesof the pressingcycleinfluencedsignificantlyin allinvestigatedphysical and mechanicalproperties, showed better results the panels madewithseven minutesof the pressingcycle, implyingthat the time ofseven minutesof the pressingcycle is thebest among theinvestigatedperiodsin the manufactureofparticleboard.

Study on Libyan Silt Property and Suggestions on its Application in Subgrade Construction

2014 ◽  
Vol 587-589 ◽  
pp. 1305-1310
Author(s):  
Ze Yu Zhang ◽  
Li Yun Peng ◽  
Jian Ye Wang ◽  
Abobakir Abdulali
Keyword(s):  
Mechanical Properties ◽  
Direct Shear Test ◽  
Shear Test ◽  
Physical And Mechanical Properties ◽  
Soil Improvement ◽  
Liquid Limit ◽  
Direct Shear ◽  
Test Results ◽  
Soil Slope ◽  
Capillary Water

The basic physical and mechanical properties of Libyan soil are analyzed through some experiments, including direct shear test, grading analysis test and compression test. According to the test results, the soil is named as low liquid limit silt featured by weak strength, high compressibility and permeability, which directly influences sub-grade stability, durability and pavement’s usability. In order to solve these problems, measures are discussed from two aspects, namely, soil improvement and construction method. The strength of the soil is apparently increased by the cement and lime adding, and the compressibility is decreased at the same time. And the rising height of capillary water reducing and protection forms for silt soil slope are also proved to be effective in the subgrade construction.

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