Impact of Temperature on the Strength Development of the Tailing‐Waste Rock Backfill of a Gold Mine

Han, Bin; Zhang, Shengyou; Sun, Wei

doi:10.1155/2019/4379606

Cited by 13 publications

(6 citation statements)

References 30 publications

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“…In the laboratory tests, sand with a grain size of up to 2 mm was used, which is used in cemented paste backfill technologies [24]. Despite the fact that the cement addition usually has not exceeded a few percent [25], with cemented paste backfill technologies, tests have been performed with the cement content exceeding 10% [26]. The highest compressive strength for cylindrical samples consisting of sand, water, and 5%, 10%, and 15% cement volume additions was obtained after four weeks from the time of preparation.…”

Section: Discussionmentioning

confidence: 99%

3D Numerical Modelling of the Application of Cemented Paste Backfill on Displacements around Strip Excavations

Skrzypkowski

2021

Energies

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This article presents laboratory and spatial numerical modeling of cemented paste backfill. The first part of the research concerned laboratory tests of a mixture of sand, water, and variable cement content (5%, 10%, and 15%). The density and curing time of the mixture were determined. Moreover, cylindrical samples with a diameter of 46 mm and a height of 92 mm were constructed, for which compressive and tensile strength were calculated after one, two, three, and four weeks. The second part of the research concerned 3D numerical modeling with the use of RS3 software. For the exploitation field with dimensions of 65 m × 65 m, a strip-mining method was designed. The main objective of the research was to determine the changes in displacements around the haulage room and transportation roadway located in the immediate vicinity of the exploitation field. For the first time in numerical modeling, a two-sided strip method was used for the four stages of mining the ore deposit where the post-mining space was filled with a cemented paste backfill. Based on this research, the compressibility coefficient was determined.

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Section: Discussionmentioning

confidence: 99%

3D Numerical Modelling of the Application of Cemented Paste Backfill on Displacements around Strip Excavations

Skrzypkowski

2021

Energies

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“…During the actual filling of mine, due to the limitation of the filling process and filling parameters, different proportions are usually used for multiple filling, and the concentration of filling slurry changes accordingly [17]. in order to more significantly observe the influence of inclination angle and mass concentration on layered cemented backfill, the cement-sand ratio is set to 1:4.…”

Section: Experiments and Methodsmentioning

confidence: 99%

Strength and Crack Propagation Analysis of Layered Backfill Based on Energy Theory

Cai,

Sun,

Zhang

et al. 2024

Archives of Mining Sciences

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The strength of backfill is greatly influenced by its inclination angle and interlayer concentration. In order to study the influence of inclination angle and interlayer mass concentration on the strength of backfill, a group of layered cemented backfill with cement-sand ratio of 1:4, interlayer mass concentration of 66%, 67% and 68% and inclination angles of 0°, 10°, 20° and 30° were prepared by using tailings as aggregate. The uniaxial compression test was carried out to analyse the effect of interlayer mass concentration and inclination angle on layered cemented backfill. The crack propagation and energy change law of the specimen during compression were analysed by J-integral and energy conservation law. The relationship between the crack initiation and propagation and strain energy of two representative three-layer backfill specimens was analysed by numerical modelling. The results show that the increase in the layer number and the inclination angle of the backfill can weaken the strength of the backfill. In a certain range of inclination angles, the weakening coefficient of the backfill caused by the inclination angle is very consistent with the cosine value of the corresponding angle. Due to the release of crack energy and the existence of interface J integral, the uniaxial compressive strength of different mass concentration backfill is different at various positions. When the displacement reaches a certain value, the crack and strain energy no longer increase.

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“…Thus, the strength of CTB increases 22 , 23 . Han et al 24 also add that the UCS of backfill increase with the curing period regardless of the binder content with the rise of temperature.…”

Section: Introductionmentioning

confidence: 99%

An experimental and numerical study of the strength development of layered cemented tailings backfill

Chiloane,

Sengani,

Mulenga

2024

Sci Rep

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The behaviour of a stratified backfilled stope in terms of strength development and stress distribution has not been well established in the field of rock engineering. Yet, the mining industries with massive ore bodies are looking into high production with a high standard of safety which is mainly governed by large excavation with backfill as a support system. It is difficult to fill these large excavations at one time. Therefore, a subsequent backfilling of the stope layer by layering is adopted, which results in a layered backfill structure. The purpose of this study was to explore the strength development, stress distribution and deformation across the stope supported by both layered and non-layered backfill. It has been observed that the backfill support system gain its strength with time, however, the layered backfill support system loses its strength when more layers are introduced, this is due to the shearing effect around the interfaces of the backfill layers. The impact of layering was validated by 3D numerical simulation. It is therefore concluded that non layered backfill support system are more suitable for stoping mining methods rather than layered support system.

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Impact of Temperature on the Strength Development of the Tailing‐Waste Rock Backfill of a Gold Mine

Cited by 13 publications

References 30 publications

3D Numerical Modelling of the Application of Cemented Paste Backfill on Displacements around Strip Excavations

3D Numerical Modelling of the Application of Cemented Paste Backfill on Displacements around Strip Excavations

Strength and Crack Propagation Analysis of Layered Backfill Based on Energy Theory

An experimental and numerical study of the strength development of layered cemented tailings backfill

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