and sorted out the rheological model of paste from the macro and meso-level. The micromechanical action and structural evolution are the fundamental reasons for the rheological properties of paste. Xue et al. [3] reviewed the development process and characteristics of metal mine backfill mining in China at various stages, introduced the ...
WhatsApp: +86 18221755073
Wu et al., 2022, [28] reviewed the characteristics and rheology of cemented paste backfill. One of their conclusions is that a standard for measuring the rheological properties of paste backfill should be established. Dikonda et al., 2021, [29] evaluated the effect of specific mixing energy to the rheological properties of paste backfill.
WhatsApp: +86 18221755073
Yang et al. (Peng et al., 2015) examined the rheological properties of paste slurries with the amount of the admixture through electron scanning microscopy …
WhatsApp: +86 18221755073
The Cemented Paste Backfill (CPB) yield stress is a key rheological parameter for paste filling technology, which has significant practical value for pipeline optimization and equipment selection ...
WhatsApp: +86 18221755073
1. Introduction. Mining industry not only provides a considerable amount of mineral resources security for economic development, but also induces many problems, such as producing a large number of underground cavities, solid waste, water and air pollution [[1], [2]].Cemented tailings backfill (CTB) has been applied in underground …
WhatsApp: +86 18221755073
Especially after entering the 21st century, China has paid more attention to mining safety, environmental protection, and the continuous implementation of resources development, China's backfill …
WhatsApp: +86 18221755073
The backfill mining method is one of the common methods of mine mining worldwide, due to its capacity to maximize the recovery of mineral resources and protect the underground and the surface ...
WhatsApp: +86 18221755073
Cemented paste backfill (CPB) has been one of the best practical approaches for tailings management and underground goaf treatment. Paste rheology is a science to study the flow and deformation behaviors of paste or filling body under the effects of stress, strain, temperature, and time during the CPB process. The goal of studying …
WhatsApp: +86 18221755073
conveying process. Finally, the future perspectives of mining with backfill are discussed based on the features of modern filling concepts to provide the necessary theoretical research value for filling mining. Keywords: mining with backfill; cementitious materials; mechanical characteristics; slurry properties; future perspectives 1. Introduction
WhatsApp: +86 18221755073
DOI: 10.1016/j.conbuildmat.2020.119212 Corpus ID: 218964166; Rheological behavior of ultrafine-tailings cemented paste backfill in high-temperature mining conditions @article{Xue2020RheologicalBO, title={Rheological behavior of ultrafine-tailings cemented paste backfill in high-temperature mining conditions}, …
WhatsApp: +86 18221755073
Design and Application of Underground Mine Paste Backfill Technology . × ... each fill must serve as a platform for both mining equipment and personnel, and typically requires high strength development in the short-term. ... it is not easy to obtain the true rheological properties of pastes, due to the complexity of the 123 164 Geotech Geol ...
WhatsApp: +86 18221755073
The backfill mining method is one of the common methods of mine mining worldwide, due to its capacity to maximize the recovery of mineral resources and protect the underground and the surface …
WhatsApp: +86 18221755073
Since filling slurry is a cement-based material, viscosity-enhancing admixture exerts a significant effect on its rheological performance and mechanical properties. Viscosity-enhancing admixture can improve pipeline transportation performance and reduce pipeline wear during the filling process of a kilometer-deep mine by changing the plastic …
WhatsApp: +86 18221755073
Cemented paste backfill (CPB), a soft concrete-like material, is extensively used in underground mines worldwide for ground support and/or mine waste disposal. One of the most important ingredients in CPB is cement but it is expensive and can amount to 75% of the cost of the CPB. Therefore, CPB reinforced with fibres has been proposed …
WhatsApp: +86 18221755073
Underground cemented paste backfill (CPB) is an important component of underground stope extraction, and is commonly used in many cut-and-fill mines in …
WhatsApp: +86 18221755073
This paper aims to study the effects of gypsum type and dosage on the rheological and strength properties of steel-slag cemented paste backfill (SSB-CPB) using fluorogypsum (FG), phosphogypsum (PG), and desulfurization gypsum (DG). Experimental results indicate that the yield stress and the viscosity of fresh SSB-CPB …
WhatsApp: +86 18221755073
The flowability and mechanical properties are increasingly crucial in the filling process of deep metal mines with mining depths exceeding 1000 m. The rheological properties of filling slurry in the pipeline were analyzed through rheological tests, L-tube self-flow tests, and semi-industrial loop te …
WhatsApp: +86 18221755073
Rheological properties of cemented paste backfill with - Paste picks up the pace. Nov 01, 2020· Time and temperature-dependent rheological properties of cemented paste backfill that contains superplasticizer Powder Technol., 360 ( 2020 ), pp. 731 - 740 Article Download PDF View Record in Scopus Google ScholarThis study investigates the time …
WhatsApp: +86 18221755073
Understanding the rheology behavior of non-Newtonian mine paste backfill is critical to ensure its flowability in the pipeline distribution system. Several rheology measurements methods for paste …
WhatsApp: +86 18221755073
Using simple L-shape pipe flow test to predict pressure drop i m of backfill slurry.. A stable homogeneous flow is achieved when limestone addition C A3 exceeds 10–15%.. The bleeding drops to 4–10% when limestone is added or concentration C w > 79%.. The optima C w = 80%, C A3 = 10% and the predicted i m is 2.2–2.5 kPa/m of the …
WhatsApp: +86 18221755073
Innovative mine backfill materials and structures. The mining of natural resources forms three broad classes of mine waste: waste rock, tailings, and coal gangue. These solid …
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073
Tailings from gold mines gradually approach ultra-fine, making mine backfill costs higher and strength lower, which poses a serious threat to the safety of underground personnel and equipment. It is well known that suitable chemical admixtures can enhance the working properties of mortar materials. Therefore, in order to achieve the purpose …
WhatsApp: +86 18221755073
Clogging pipelines is one of the most common and urgent problems in paste backfill mining. The aim of the present study was to solve the problem of pipe blockage in paste backfill mining. In this paper, paste mixed with coal gangue, fly ash, cement, and additives is used to investigate the influence of three air-entraining agents (AEAs) …
WhatsApp: +86 18221755073
To study the influence of the rheological properties of backfill materials on strata movement during solid backfill mining, Poyting-Thomson model was selected as the rheological model for the backfill materials based on their experimentally derived rheological properties. By regarding the roof as a thin elastic plate, a rheological …
WhatsApp: +86 18221755073
Download Citation | A simple L-shape pipe flow test for practical rheological properties of backfill slurry: A case study | Cemented high-density or paste backfill is commonly used in underground ...
WhatsApp: +86 18221755073
Special Issue Information. Dear Colleagues, Cemented tailings backfill (CTB) or cemented paste backfill (CPB) is a novel, sustainable, and environmentally friendly technology for …
WhatsApp: +86 18221755073
struction of mines has become an important issue for the mining industry. Cemented paste backfill (CPB) technology has been widely adopted in China to minimize severe environmental damage and safety problems faced by China's mining devel-opment. In this manner, green metal mining becomes pos-sible. CPB is a paste prepared by mixing …
WhatsApp: +86 18221755073
The macroscopic flow behavior and rheological properties of cemented paste backfill (CPB) are highly impacted by the inherent structure of the paste matrix. In this study, the effects of shear-induced forces and proportioning parameters on the microstructure of fresh CPB were studied. The size evolution and distribution of …
WhatsApp: +86 18221755073
Researchers have realized significant breakthroughs based on the rheological mechanisms and operational properties of grouts. The limitations of time consumption and external obstacles,which ...
WhatsApp: +86 18221755073