equipment for rheological properties for backfill in mines

equipment for rheological properties for backfill in mines

Rheological Properties of Cemented Paste Backfill with

Mine backfill is often an integrated part of underground mining for several reasons as follows: The rheological properties of CPB mass is greatly affected by several parameters including particle size distribution, chemical composition, liquor and solids density, pH, temperature, admixture, mineralogy, mixing regime, and solids concentration [28,29,30]. There is an internal

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Rheological properties of cemented paste backfill with

01.11.2020· The rheological properties of CPB are strongly dependent on the coupled effects of the amount of nS and curing temperature. The addition of 3% nS as an additive (by weight) and curing the samples at a higher temperature of 35 °C considerably increase their yield stress and viscosity. The nS particles provide siliceous surface for the early precipitation of cement

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equipment for rheological properties for backfill in mines

Mine Backfill Brochure Paterson Cooke. assessment, rheological and flow behaviour characterization and backfill recipe tool for predicting the dewatering and flow properties of the backfill product. the correct selection of equipment type and capacity crucial to the operability of the .. on a Budget; low capital paste backfill injection for small mines or

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CFD Simulation of Pipeline Transport Properties of Mine

backfill pump equipment represents an enormous expenditure for a mine. Therefore, an increasing amount of attention has been paid to improve the transport properties of paste slurry while satisfying the transportation and strength requirements of the backfill [10]. Foam concrete is a new type of lightweight concrete material, which is composed of standard foam and cement

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Contribution to Laboratorial Determination of Rheological

2.1 Mine backfill 4 2.2 Paste backfill 5 2.2.1 Supply of materials 5 2.2.2 Mix design 6 2.2.3 Production 9 2.2.4 Future challenges 10 2.3 Rheology 12 2.3.1 Rheological properties, concepts and models 12 2.4 Paste backfill rheology 18 2.4.1 Determinant factors 19 2.4.2 Yield Stress 21 2.4.3 Measurement methodologies 24

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Sampling and Mechanical Testing of Backfill in Large

To investigate the physicomechanical properties of stope backfill and to explore the mining conditions for an adjacent pillar, four boreholes, namely, GZK1, GZK2, GZK3, and GZK4, were constructed for taking the backfill core in the test stope. During borehole sampling, it is found that the strength of backfill is usually lower than that of the rock and ordinary concrete, and its

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Rheological properties of cemented paste backfill with

01.11.2020· The rheological properties of CPB are strongly dependent on the coupled effects of the amount of nS and curing temperature. The addition of 3% nS as an additive (by weight) and curing the samples at a higher temperature of 35 °C considerably increase their yield stress and viscosity. The nS particles provide siliceous surface for the early precipitation of cement hydration products. They act

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Rheological behavior of ultrafine-tailings cemented

30.08.2020· The ultrafine-tailings cemented paste backfill (UCPB) exhibits special rheological characteristics in the high-temperature underground mining environment, which has an important influence on the stability of pipeline transportation. This study examines the time- and temperature-dependent rheological behavior of UCPB that the d(av) of tailing is 9.41 µm, and the effects of high

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Contribution to Laboratorial Determination of Rheological

2.1 Mine backfill 4 2.2 Paste backfill 5 2.2.1 Supply of materials 5 2.2.2 Mix design 6 2.2.3 Production 9 2.2.4 Future challenges 10 2.3 Rheology 12 2.3.1 Rheological properties, concepts and models 12 2.4 Paste backfill rheology 18 2.4.1 Determinant factors 19 2.4.2 Yield Stress 21 2.4.3 Measurement methodologies 24

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UsingCoupledRheometer-FBRMtoStudyRheologicalProperties and

the mining engineer proposed to use the cemented paste backfill(CPB)technology,whichbackfillsthetailingswith a certain amount of cementitious material that usually accounts for 2–10% of the total weight [6, 7]. CPB tech-nology excels in tailings utilization and the strength of filling body and is widely used in metal mines and coal mines[8,9]. Although the CPB

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Using Coupled Rheometer-FBRM to Study Rheological

Rheological properties, such as the yield stress, viscosity, and thixotropy, are related to the microstructure of cemented paste backfill (CPB). To highlight the relationship, two instruments were combined to measure the changes in the microstructure and the rheological properties of CPB simultaneously. In this way, the particle/agglomerate size distribution characterized by the focused

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Sampling and Mechanical Testing of Backfill in Large

To investigate the physicomechanical properties of stope backfill and to explore the mining conditions for an adjacent pillar, four boreholes, namely, GZK1, GZK2, GZK3, and GZK4, were constructed for taking the backfill core in the test stope. During borehole sampling, it is found that the strength of backfill is usually lower than that of the rock and ordinary concrete, and its resistance to

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Determining the Rheological Properties of Mine Tailings

Determining the Rheological Properties of Mine Tailings By Jan Philip Plog 07.16.2015 Mining activities produce a variety of waste products, including waste rock, slags, overburden, mine water, and tailings. Tailings are leftover mineral byproducts of ore processing. The composition of tailings depends on the composition of the ore and the extraction process used to obtain the ore. Tailings

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(PDF) A review of underground mine backfilling

Mining experience shows that the backfill mining method is the safest, most efficient and environmentally friendly mining method for deep mines, and the cemented paste backfill

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(PDF) Underground mining with backfills ResearchGate

This paper is an attempt to relate the microstructure to long-term mechanical properties of the cemented paste backfill produced from a hard rock mine tailing from North Queensland in Australia

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1. Introduction Hindawi

The backfill mining method is commonly employed in the mineral resources exploitation for nonferrous and precious metals. Due to the increasing mining depth, more and more iron mines have started to use the backfill mining method for safety causes [1 3].Comparing with nonferrous metal mine tailings, the iron tailings feature a coarse particle size distribution and a high grade of metal

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UsingCoupledRheometer-FBRMtoStudyRheologicalProperties and

the mining engineer proposed to use the cemented paste backfill(CPB)technology,whichbackfillsthetailingswith a certain amount of cementitious material that usually accounts for 2–10% of the total weight [6, 7]. CPB tech-nology excels in tailings utilization and the strength of filling body and is widely used in metal mines and coal mines[8,9]. Although the CPB

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Using Coupled Rheometer-FBRM to Study Rheological

Rheological properties, such as the yield stress, viscosity, and thixotropy, are related to the microstructure of cemented paste backfill (CPB). To highlight the relationship, two instruments were combined to measure the changes in the microstructure and the rheological properties of CPB simultaneously. In this way, the particle/agglomerate size distribution characterized by the focused

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Time-dependent rheological properties and mechanical

01.01.2020· The paper presents the results of an experimental study on time-dependent rheological properties and mechanical performance of fresh cemented tailings backfill (CTB) mixtures with flocculants (Anionic-type polyacrylamide). The rheological and mechanical parameters of CTB samples with different binder contents (cement/tailings ratio of 1/10 and 1/20) were prepared and tested at

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The Selection and Application of Filling Material Based

High stress makes backfill body present the rheological properties in deep mine. This paper first uses RRTS-ⅢA to carry on creep test of specimen in different proportion, according to ε-t curves under different load levels to determine the specimen’s long-term strength, based on the exponential relationship of rock block and rock body, the long-term compressive strength is derived

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Cemented paste backfill modification using different types

experiments on rheological properties, it is found that the there is hardly any difference between the cement and slag blended cement binders on flow properties namely the yield stress and slump, while the binder dosage has an effect. The smaller cylindrical slump device appears to have good potential for slurries like mine tailings or dredged mud that have high water content for slump test as

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[PDF] Experimental Study on Rheological Properties and

This experimental study presents the rheological properties and strength characteristics of cemented unclassified tailings backfill (CUTB). The particle size distribution and chemical properties of tailings from the Shizhuyuan lead-zinc mine were examined experimentally. A series of rheological properties and uniaxial compressive strength (UCS) tests were conducted to study the relations

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HYDRAULIC BACKFILL TECHNOLOGY FOR THE CLOSURE OF THE

OF THE ABANDONED SULFIDE MINE IN MÁTRASZENTIMRE J. FAITLI 1–R. WEISZ 2 1 during the fundamental research before the design of the backfill technology, the physical characteristics of the recent outflow of the Mátra fly ash pipeline were tested extensively. Regarding the particle size distribution, particle density and rheological properties of the water mixtures of the <160 µm fly ash

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Rheology of Coal SGS

These rheological properties of coal in the coke oven have a major impact on the resultant coke quality. SGS uses the industry standard Gieseler Plastometer and Arnu Dilatometer tests, as well as the Sapozhnikov and G Caking Index Tests to accurately determine the rheological and inert assimilation properties of your coal samples. The data gained through rheological testing enables you to

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1. Introduction Hindawi

The backfill mining method is commonly employed in the mineral resources exploitation for nonferrous and precious metals. Due to the increasing mining depth, more and more iron mines have started to use the backfill mining method for safety causes [1 3].Comparing with nonferrous metal mine tailings, the iron tailings feature a coarse particle size distribution and a high grade of metal

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Interface Shear Behavior of Cementing Underground Mine

This paper presents the findings from an experimental investigation that was conducted to assess the shear behavior and the changes in the shear behavior and strength parameters for cemented paste backfill (CPB)–CPB interface as well as the effects of key influential factors (normal stress, curing time, interface roughness, and tailings) on the shear characteristics at the CPB–CPB interface.

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