Equipment For Rheological Properties For Backfill In Mines

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Progress and prospects of mining with backfill in metal …

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

Typical variation of water-to-cement ratio w/ c with paste backfill …

A critical geotechnical quality criterion for cured mine backfill is the mechani cal strength [10, 19, 20], which is important for load bearing applications such as roof and goaf support [9] in ...

Backfill Technologies and Designs for Deep-Level Sylvinite Mining …

The use of salt waste, including tailings, slimes and brines, to prepare backfill mixture with the process characteristics required to ensure the wanted rheological properties, as well as the strength and deformation characteristics of consolidated backfill ensures utilization of all solid and liquid waste of mining and processing.

The Rheological Properties and Strength Characteristics of …

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) (including sodium …

Fluidity and rheological properties with time-dependence …

CG used for backfilling and building materials accounts for the largest proportion. The coal gangue treatment has uncoordinated mining and filling, and the filling capacity cannot meet the demand for gangue processing capacity [13].Zhang et al. estimated that by 2030, the volume of goafs would reach 24.1 billion m 3 in China, and if the 15 % volume of these goafs can be …

The thixotropic characteristics of rheological parameters of …

C-CPB belongs to non-Newtonian fluids [1].Rheological properties that serve as a crucial feature of non-Newtonian fluids have been extensively studied [2], [3].The rheological behavior of the paste is affected by many factors has been investigated by researchers through various methods [4], [5], [6].Haitham M. Ahmed compared rheological test methods such as …

Towards Understanding the Rheological Properties of …

Additionally, the rheological properties of Slag-CPB decreased when the concentration of sodium chloride increased. The results presented in this manuscript will provide a better understanding of the rheological properties of Slag-CPB and thus contribute to the better designing of Slag-CPB with optimal flowability and suitable mechanical stability.

Mining with backfill: predicting backfill strength …

After determining the required strength of the cemented backfill, the rheological and transport parameters through an underground pipeline distribution line should be determined. At this …

A systematic review of paste technology in metal mines for …

Yang et al. (Peng et al., 2015) examined the rheological properties of paste slurries with the amount of the admixture through electron scanning microscopy and revealed the nature of the admixture optimizing the microstructure of the paste slurry to effectively improve the rheological properties, as illustrated in Fig. 10. Admixtures for mines ...

Mechanical properties under triaxial compression of coal …

In terms of rheological properties, Di Wu et al. [41], ... The equipment can be used for the mechanical test of rock mass, coal, concrete, backfill, and other materials. ... A contribution to understanding the effects of curing temperature on the mechanical properties of mine cemented tailings backfill. Eng. Geol., 114 (2010), ...

Time-dependent rheological properties and mechanical performance …

Various studies on the rheological properties of fresh CTB with or without admixtures have been investigated. Ferraris et al. (2001) stated that fly ash-cement binary paste with a low shear rate showed high yield stress. You et al. (2007) investigated the rheological properties of cement paste containing ultrafine blast furnace slag. Wu et al. (2013) presented …

Backfill Technologies and Designs for Deep-Level Sylvinite …

New principles and technologies of deep-level sylvinite extraction and backfill material transport by creating such geotechnical structures in stopes which ensure formation …

A Particle Size Distribution Model for Tailings in Mine Backfill …

With the increasing awareness of sustainable mining, the cement tailings backfill (CTB) method has been developed rapidly over the past decades. In the CTB technique, the two main mechanical properties engineers were concerned with are the rheological properties of CTB slurry and the resulting CTB strength after curing. Particle size distribution (PSD) of …

Rheological performance regulation of solidified soil slurry for mine …

As coal mining in the western mining areas of China continues to increase, the accumulation of coal gangue has significantly impacted the ecological environment and green development of the mining regions [1], [2], [3].Land reclamation is a crucial method for the in-situ disposal of coal gangue, primarily involving filling ditches to create land, in-situ landfills, and …

Key theory and technology of cemented paste backfill for green mining

Key theory and technology of cemented paste backfill for green mining of metal mines. Author ... Accurate calculation of pipeline flow resistance can only be achieved by considering both the rheological properties of the paste and the wall slip effect. ... the personalized design of the equipment in the cemented paste backfill process makes it ...

Flocculation, dewatering and sedimentation behaviour of mine backfill …

Against this background, the mine backfilling technology have been emerged as the times require especially since 1950 s. This technology is that: under the condition of adding chemical agents (flocculants, etc.), some mine waste rocks, mineral processing tailings, smelting solid wastes, and other feeds surrounded the mining area (such as Gobi sandstone, etc.) are …

Sulphate-temperature-time interactions and their influence …

1. Introduction. Cemented paste backfill (CPB) has become increasingly popular in the mining industry worldwide thanks to the benefits it offers in terms of mine waste disposal and ground support [[1], [2], [3]].CPB is a heterogeneous material composed of fine aggregates (usually tailings), a hydraulic binder (often ordinary Portland cement, a slag-cement blend or a …

Key theory and technology of cemented paste backfill for …

In this paper, we introduce the paste rheology theory system, which forms the theoretical backbone of cemented paste backfill. We delve into key technologies such as …

Recycling waste tyre polymer for production of fibre …

The underhand cut-fill backfill mining manner (UCFBMM) is widely employed in nonferrous metallic mines, and stability of the artificial backfill top plate directly determines the safety of operators and equipment, which puts forward higher requirements on …

Mines Need Consistent Quality and Quantity of Backfill

"There is considerable demand for consistent quality and quantity of backfill in mining operations," Rob Bradley, manager - mine engineering at Murray & Roberts Cementation, says. ... "This is not a case of a generic solution fitting all mines," Bradley says. From the rheological design and type of fill, the company designs the reticulation ...

Determining the Rheological Properties of Mine Tailings

To determine if tailings can be pumped with the existing pumping equipment, the viscosity and the yield stress need to be measured with rheometers. ... Determining the Rheological Properties of Mine Tailings By Jan Philip Plog 07.16.2015 ... Tailings are currently used as backfill in underground mines, stored in open pits, dried and stacked, or ...

Temperature effect analysis of paste backfill rheological properties

1. Intronduction. The current underground mining of metal mines produces a large amount of tailings, which are often set up in tailings ponds for storage, occupying a large amount of geospatial resources and damaging the original environment, while long-term accumulation may cause mudslides, dam failures and other disasters [1], and is one of the …

Rheological properties of cemented paste backfill with …

However, CPB differs from concrete, mortar, grout, and cement. The water to cement (w/c) ratio of CPB is typically higher than 6 [[29], [30], [31]].The reason for a high-water content in CPB is to enhance its rheological performance, and thus its flowability [[32], [33], [34]].The rheological properties of CPB are used to show its behavior under flow.

Advances in Underground Mine Backfill: Advances in Civil …

Mine backfill is a well-established and proven practice within the underground mining industry. The wide application of backfill technology in mining engineering helps to …

Rheological behavior of paste in metal mines | International …

The goal of studying paste rheology is to solve the engineering problems existing in four key processes; that is, paste rheology should meet the engineering demands of …

Rheological behavior of paste in metal mines

The rheological behavior of full tailings in deep thickening, rheological behavior of paste in mixing and pipeline transportation, and rheological behavior of filling body are introduced and ...

Sulfate-induced changes in rheological properties of fibre …

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 and introduced in backfill …

Rheological and mechanical properties of full-tailings backfill

Investigators [17], [18], [19] developed a new type of cementitious material by taking advantage of the synergistic effect of blast furnace slag and steel slag. The required amount of new cementitious material in the full-tailings backfill was only 50% of the crude cement amount. The strength of the backfill with a cementitious material-sand ratio of 1:4 was 5.76 …

Rheology of Paste in Metal Mines

This book investigates the rheology of paste in metal mines, which is beneficial for cemented paste backfill (CPB) technology.

Design and Use of Backfill for Support in Polish Coal Mines…

Rheological properties of saline water, gypsum (flue-gas desulphurisation by-product) and fly ash and activators are strictly connected with a percentage Of particular components, their properties such as grain-size, shape and chemical characteristic and slurry density. Typical rheological properties of that type of slurry are shown in Figures 7-8.

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