Effect of activating treatment of halite flotation waste in backfill mixture preparation

Kongar-Syuryun, Cheynesh; Faradzhov, V.; Tyulyaeva, Yu.S.; Khayrutdinov, Albert M.

doi:10.25018/0236-1493-2021-1-0-43-57

Cited by 18 publications

(8 citation statements)

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“…Some scholars have used fiber concrete to improve the properties of engineering materials [12,13]. Some scholars also use low-strength materials as backfill or high-strength materials in coal mines [14][15][16]. However, the study of the above materials is considered from the perspective of protection and reinforcement and has no reference significance for the stability analysis and instability mechanism under hydraulic and dynamic action.…”

Section: Introductionmentioning

confidence: 99%

Proportioning Test on the Similar Materials of the Rock Mass Physical Model Test Considering Seepage and Dynamic Characteristics

Shi,

Zhang,

Xin

et al. 2023

JMSE

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With the development of infrastructure construction, an increasing number of projects are faced with the problem of hydraulic and dynamic coupling. However, traditional physical model materials mainly consider the single factor influence and lack comprehensive research on the hydraulic and dynamic parameters of similar materials. Based on the dimensionless criterion and Buckingham π theorem, the dimension and similarity relation of physical model tests of rock masses under seepage and dynamic coupling are derived. A new type of similar material considering hydraulic and dynamic properties was developed by using quartz sand, barite powder, cement, water glass, rosin, and glycerol as raw materials through a large number of orthogonal tests. Meanwhile, the sensitivity analysis of the physical and mechanical properties of similar materials was carried out and the influence of each component factor on the physical properties was revealed. A material preparation scheme was developed to meet the physical and hydraulic characteristics of different rock and soil physical models. An empirical matching formula considering each parameter is proposed. This work can provide an important reference for physical model tests of similar rock masses.

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Section: Introductionmentioning

confidence: 99%

Proportioning Test on the Similar Materials of the Rock Mass Physical Model Test Considering Seepage and Dynamic Characteristics

Shi,

Zhang,

Xin

et al. 2023

JMSE

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“…Tailings are solid waste generated after beneficiation, and the annual discharge of iron ore tailings is increasing, posing a great threat to the natural environment [3]. Therefore, how to properly dispose of these solid wastes has become an urgent issue to be solved [4,5].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Fiber on the Mechanical Properties of Controllable Low-Strength Materials

Qian

Jiang

2023

Materials

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Numerous studies have been conducted on fiber-reinforced concrete; however, comparative investigations specifically focusing on the utilization of fibers in CLSM remain limited. In this study, we conducted a systematic investigation into the mechanical properties of controlled low-strength material (CLSM) by manipulating the length and doping amount of fibers as control variables. The 7-day compressive strength (7d-UCS), 28-day compressive strength (28d-UCS), and 28-day splitting strength of CLSM were employed as indicators to evaluate the material’s performance. Based on our comprehensive analysis, the following conclusions were drawn: (1) A positive correlation was observed between fiber length and material strength within the range of 0–6 mm, while conversely, a negative correlation was evident. Similarly, when the fiber doping was within the range of 0–0.3%, a positive correlation was identified between material strength and fiber doping. However, the strength of CLSM decreased when fiber doping exceeded 0.3%. (2) SEM and PCAS analyses provided further confirmation that the incorporation of fibers effectively reduced the porosity of the material by filling internal pores and interacting with hydration products, thereby forming a mesh structure. Overall, this study offers valuable insights into the manipulation of fiber length and doping amount to optimize the mechanical properties of CLSM. The findings have important implications for the practical application of CLSM, particularly in terms of enhancing its strength through fiber incorporation.

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“…With regard to the research on the mechanical properties of cemented backfill, researchers have performed a considerable amount of studies. For example, relevant scholars [ 8 , 9 ] indicate that the activation treatment of tailings before the mixing of tailings and cemented dry materials can effectively enhance the strength and rheological properties of tailings. Yang et al [ 10 ] conducted a uniaxial impact test on the high-concentration cemented filling body using the split Hopkinson bar system, and analyzed the relationship between the dynamic compressive strength, dynamic strain, strength enhancement factor, specific energy absorption, and average strain rate of the specimen.…”

Section: Introductionmentioning

confidence: 99%

Analyzing the Energy and Damage Constitutive of Cemented Backfill with Different Water Content under Dynamic Load

Hu,

Li,

et al. 2023

Materials

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The dynamic characteristics of the filling body are the key parameters for designing the filling ratio and evaluating the stability of an underground stope. The different environment (water-bearing state) of the filling body in the underground stope exerts a complex impact on the mechanical behavior of the filling body. Therefore, six groups of cemented filling body specimens with different states were formed and subjected to dynamic uniaxial impact tests. The effects of water content on the mechanical properties, fractal dimension, and deformation damage characteristics of the cemented backfill under dynamic load were analyzed in depth, and a dynamic damage constitutive model that considers water damage and the compaction stage was established. The results indicate the following: (1) Due to the change of the specimen from the dry state to the water saturation state, the dynamic compressive strength of the cemented filling body decreases from 5.03 Mpa to 1.79 Mpa; however, the ductility of the specimen generally increases, and the filling body specimens with different water contents mainly exhibit tensile failure. (2) There is a significant nonlinear relationship between the water content and the fractal dimension Db of the cemented backfill specimen, and the growth rate of the fractal dimension Db tends to slow down with the increase in the water content. (3) From the energy evolution perspective, the water content of the specimen exerts a significant effect on the elastic deformation and failure stage of the stress–strain curve, and the slope of the dissipated energy-strain curve decreases with the increase in water content. (4) Based on the Weibull distribution and damage theory, a statistical damage constitutive model of cemented backfill was established, and it was compared with the experimental curve to verify the rationality of the model. Therefore, the relationship between stress and damage and the strain curves is discussed, and it is inferred that the damage evolution curve of cemented backfill is a typical S-shaped curve that exhibits a stable development-rapid increase-tending to be gentle. This study can provide a theoretical reference for further understanding the dynamic behavior and stability of backfill under different water conditions.

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Effect of activating treatment of halite flotation waste in backfill mixture preparation

Cited by 18 publications

References 0 publications

Proportioning Test on the Similar Materials of the Rock Mass Physical Model Test Considering Seepage and Dynamic Characteristics

Proportioning Test on the Similar Materials of the Rock Mass Physical Model Test Considering Seepage and Dynamic Characteristics

The Influence of Fiber on the Mechanical Properties of Controllable Low-Strength Materials

Analyzing the Energy and Damage Constitutive of Cemented Backfill with Different Water Content under Dynamic Load

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