Effect of Grinding and the Mill Type on Magnetic …
The influence of the grinding process on the magnetic properties of as prepared and functionalized multiwall carbon nanotubes (MWCNTs) is presented. We have observed that 3 h mechanical …
Temperature Effect on the Impact Characteristics of Mine …
The effect of temperature on the impact characteristics of the ring chain under different working conditions was investigated with ABAQUS simulation, the curves were fitted with MATLAB, and the results were experimentally verified. The temperature has little effect on minimum steady-state stress. The friction energy dissipation has …
Effects of Vegetation Reclamation on Temperature and …
Vegetation cover greatly influences the microclimate of a landscape, which plays an important role in ecosystem function and health. The following study examines the influence of different vegetation types on the microclimate of a surface mine reclamation site. Average soil and air temperatures are significantly lower, while relative humidity is …
Recycling lithium mine tailings in the production of low temperature …
Request PDF | Recycling lithium mine tailings in the production of low temperature (700–900 °C) ceramics: Effect of ladle slag and sodium compounds on the processing and final properties | This ...
The effect of temperature on mine rocks
Hartman, I., and Greenwald, R.P., Effect of changes in moisture and temperature on mine roof: U.S. Bureau of Mines, Report of Investigations. 35SB, 1941, 40. pp. objectiVi s were to determine the relative importance of. humidity. and temp-erature changes on the expansion and contraction of mine-roof rock samples
Effect of deep mine temperature conditions on the heat
Effect of deep mine temperature conditions on the heat development in cemented paste backfill and its properties. January 2014. DOI: …
Effect of Curing Temperature under Deep Mining Conditions …
The only way to develop metal mines in the future is to reach the deeper parts of the earth [ 2 ]. However, by increasing the mining depth, geological conditions …
Effect of Acidic Mine Drainage on the Mechanical and …
This paper describes a study of the physical effects of exposing three geosynthetics commonly used in waste containment systems (a geomembrane, geotextile, and drainage geocomposite) to a synthetic acidic mine drainage (AMD) from metallic mine wastes in an environment with limited access to oxygen and ultraviolet (UV) radiation.
Effect of calcination temperature on structural, optical and
In the present work, we have investigated the role of calcination temperature in altering the structural, optical and antibacterial properties of ball mill synthesized Co3O4 nanoparticles. The outcomes of X-ray diffraction patterns and their Rietveld refinement confirm the presence of spinel cubic phase of Co3O4 and lattice …
The temperature of Britain's coalfields | Quarterly Journal of
Volume 54. https://doi/10.1144/qjegh2020-109. PDF/EPUB. Abstract. Low-temperature heat recovery, cooling and storage schemes, using abandoned flooded mine workings, …
Temperature evolution in abandoned mines and the effect …
At high adsorption equilibrium pressure, the initial adsorption rate increases with the rise of temperature. When the pressure is 2.5 MPa, the initial adsorption rates at 30, 60, and 90 °C is 1.25, 2.22, and 2.32 ml g −1 min −1, respectively. Temperature affects the gas adsorption characteristics of residual coal.
Cemented paste backfill for mineral tailings management: Review and
In modern mining, waste material is often backfilled into underground voids or open pits after the precious minerals are extracted. Such backfill practice has been well adopted in various mining methods, i.e. cut-and-fill (Henderson et al., 1998), sublevel opening stoping (Emad et al., 2015), and open pit mining (Lu et al., 2018).Backfill has …
Effect of deep mine temperature conditions on the heat
Request PDF | On Jan 1, 2014, Mamadou Fall and others published Effect of deep mine temperature conditions on the heat development in cemented paste backfill and its properties | Find, read and ...
Consolidation of mine tailings through geopolymerization …
With increasing the ratio of metakaolin from 0% to 50%, geopolymer gel in the mine tailings-based geopolymers increased from 33.92% to 79.45%, leading to the compressive strength that increased from 2 to 15.5 MPa. With addition of Pb(NO 3) 2, a three-stepped changes in the compressive strength and microstructure of the …
Effect of environmental factors on mechanical properties …
The infiltration of sulphate solution turns the mine overburden filler into weak frost heaving soil. The mine overburden with a CGC of 40% – 60% can be selected to improve the environmental adaptation. The wrapping method is recommended to reduce the impact of negative temperature and moisture on mine overburden subgrade.
Changes in physicochemical properties on a chronosequence of gold mine
Understanding the trajectory of changes in substrate physicochemical properties is critical for revegetation of mine tailings. The study tracked changes of selected physicochemical properties as proxies of pedogenesis over time and across different topographic positions on a chronosequence of six abandoned gold tailings (10, …
Effects of mineral additives and age on microstructure …
Sodium silicate effect on setting properties, strength behavior and microstructure of cemented coal fly ash backfill ... Utilization of mill tailings, fly ash and slag as mine paste backfill material: Review and future perspective. Constr. Build. ... Influence of silica fume and low curing temperature on mechanical property of cemented paste ...
Effects of Vegetation Reclamation on Temperature and Humidity
Effects of Vegetation Reclamation on Temperature and Humidity Properties of a Dumpsite: A Case Study in the Open Pit Coal Mine of Heidaigou January 2015 Arid Land Research and Management 29(3):375-381
Effects of mine water on growth characteristics of ryegrass …
Effects of mine water on growth characteristics of ryegrass and soil matrix properties Sci Rep. 2022 Oct 22;12(1):17758. doi: 10.1038/s41598-022-22625-y. ... as well as soil properties. Mine water irrigation inhibited all of the indicators evaluated in this study, whereas a mixture of clean water and mine water had a stimulatory effect. ...
Effect of Temperature on Macroscopic and Microscopic …
The sandstone used in this experiment was a sedi-mentary rock in its natural state with a certain number of pre-existing fissures and pores, as shown in Fig. 14(a). These defects afect the properties of sandstone. As the tempera-ture increased from 25 °C to 500 °C, the number and size of cracks were almost unchanged.
EVALUATION OF GOLD MINE TAILINGS IN CEMENT MORTAR: INVESTIGATION …
Abstract. This study presents an experimental investigation on the influences of gold mine tailings as a substitute for cement. Various ratios of air-entraining and superplasticizer admixtures were used in the determined composition of gold mine tailing-containing mortars.
A contribution to understanding the effects of curing …
A contribution to understanding the effects of curing temperature on the mechanical properties of mine cemented tailings backfill | Semantic Scholar. DOI: …
Paper: Effect of deep mine temperature conditions on the …
Results showed that deep mine temperatures have a significant effect on the properties of CPB. Increasing the curing temperature increases the rate of CPB strength …
Effect of deep mine temperature conditions on the heat …
Results showed that deep mine temperatures have a significant effect on the properties of CPB. Increasing the curing temperature increases the rate of CPB strength …
Effect of environmental factors on mechanical properties …
The wrapping method is recommended to reduce the impact of negative temperature and moisture on mine overburden subgrade. Discover the world's research 25+ million members
Effect of Curing Temperature under Deep Mining …
Nowadays, the cemented paste backfill mining method is widely used in mines. Since the temperature of the mine increases with increasing mining depth, the influence of temperature on the …
Effects of mine water on growth characteristics of ryegrass …
The artificial light source was selected as follows: temperature, 25 ± 0.5 °C; ... and the effects of mine water on the properties of the soil matrix cannot be generalized. Indoor experiments ...
Temperature Effect on the Impact Characteristics of Mine …
Introduction. The ring chain is the key part of the transmission system of scraper conveyors. The deeper the coal mine, the more different the temperature. The …
A contribution to understanding the effects of curing temperature …
DOI: 10.1016/J.ENGGEO.2010.05.016 Corpus ID: 129858080; A contribution to understanding the effects of curing temperature on the mechanical properties of mine cemented tailings backfill
Understanding the impact of geotechnical ore properties …
Section snippets JKMRC background – Mine to Mill models. Mine to Mill is an approach developed at Julius Kruttschnitt Mineral Research Centre (JKMRC) that "involves identifying the leverage that blast results have on different downstream processes and then optimising the blast design to achieve the results that maximise the overall …
Boiler Performance and Mill Outlet Temperature
The mill outlet temperature of coal-air mixture is maintained between 65 to 90 degree centigrade in the case of low and medium volatile coal. In the case of high volatile coal, while the lower limit generally remains as 65 degree centigrade, the upper limit is restricted to a lower level depending on percentage of volatile content in coal.