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properties of cemented rockfill used in an open pit mine

properties of cemented rockfill used in an open pit mine

Properties of cemented rockfill used in an open pit mine

This paper examines the physical properties of cemented rockfill that is being used to form a crown pillar between future underground mining and the existing open pit at the Diavik Diamond mine in Canada. This is a unique application of cemented rockfill in mining. The preparation and placement procedures and quality control measures used for the

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[PDF] Properties of cemented rockfill used in an open pit ...

This paper examines the physical properties of cemented rockfill that is being used to form a crown pillar between future underground mining and the existing open pit at the Diavik Diamond mine in Canada. This is a unique application of cemented rockfill in mining. The preparation and placement procedures and quality control measures used for the cemented rockfill are presented.

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Shear properties of cemented rockfills - ScienceDirect

Aug 01, 2018  In many Canadian underground mines, the use of cemented rockfill (CRF) as backfill material is a common practice (Yu and Counter, 1983, Reschke, 1993, Shrestha et al., 2008, Emad et al., 2012). Especially in cut-and-fill or blasthole stoping operations, which are usually divided by the primary and secondary stopes, shear properties play an ...

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CEMENTED ROCKFILL IN MINING - A REVIEW TECHNICAL

At Kidd Creek Mine, Tirrunins ,. Ont ario, cemented rockfill is used to mine secondary pillars in 130 m (400 ft) lifts using a oked draw . Hull and Miller's (1974) r eport contains the following limited i nformation on fill operations at Kidd Creek Mine . The rock is mined from an open pit and crushed and well graded from -150 mm down.

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Investigation of Cemented Rockfill Properties Used at a ...

Scale Cemented Rockfill Used at a Canadian Diamond Mine,” International Journal of Mining and Mineral Engineering, Submission code: IJMME-202427. Chapter 4 of this thesis has been submitted as B.A. Lingga, D. Apel, M. Sepehri, and Y. Pu, “Assessment of Digital Image

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An experimental study on compressive behaviour of cemented ...

Jul 20, 2019  CRF, which is also known as consolidated rockfill, comprises different sized rocks from underground or open-pit mines (aggregate), water, and a hydraulic binder. Each of these components has a critical role in the transport, placement and strength gain of the rockfill in both the short-

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Types of Mine Backfill - MiningInfo

Cemented Rockfill. Generally consist of waste rock mixed with a cement slurry to improve the bond strength between the rock fragments. Methods of placement involve mixing the rock and cement slurry in a hopper before placing in stopes, or percolating a slurry over the rock after it has been placed. The waste rock can be classified or unclassified.

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Backfill - QueensMineDesignWiki

Rock fill can be cemented or non-cemented mine waste rock or aggregate material placed underground by means of trucks, conveyors or raises. Each backfill operation is unique in terms of the business case, logistics, mining depth, strength required, materials used and the reason for the backfilling operation.

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Effect of delayed backfill on open stope mining methods ...

Design curves were developed for the stability of sill mats for various stope configurations and cemented rockfill strength properties This, coupled with defining the effect of mining adjacent to backfill, forms the focus of this thesis. For non-commercial purposes only, such as research, private study and education.

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A Gaussian process machine learning model for cemented ...

Oct 18, 2019  Reschke A (1993) The use of cemented rockfill at Namew Lake mine, Manitoba, Canada. In: Minefill, pp 101–108. 2. Shrestha BK, Tannant DD, Proskin S, Reinson J, Greer S (2008) Properties of cemented rockfill used in an open pit mine. In: GeoEdmonton’08. The Canadian geotechnical society edmonton, pp 609–616. 3.

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Part 645 Construction Inspection National Engineering

The four properties used for evaluation are perme-ability, resistance to piping, compressibility, and work-ability. A numerical rating from 1 (most suitable) to 14 (least suitable) is used to determine the relative suit-ability of soil materials in rolled earth embankments, channel sections, and foundations.

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Minerals Free Full-Text Safety Analysis of Synergetic ...

The transition from open pit mining to underground mining is essential for mineral resources to achieve deep excavation. Recently, cemented paste backfill (CPB) has been proposed as a novel technology to achieve open pit backfill (OPB). The proposed method not only eliminates the danger of the open-pit slope but also reduces the disposal of waste tailings. In order to ensure safe mining during ...

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State-of-the-Art Techniques for Backfilling Abandoned

by in-mine or remote methods, and various point support methods that do not completely fill the mine void and are used for the protection of small areas of the land surface and surface structures. IMining engineer, Pittsburgh Research Center, U.S. Bureau of Mines, Pittsburgh, PA (now with U.S. Department of Energy, Germantown, MD).

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Major Mines Projects Meliadine Mine

Each stope is backfilled, with cemented pastefill and/or cemented rockfill used in primary stopes and dry rockfill for the secondary stopes. A conventional truck/shovel operation is used for the open pits. Mining at Tiriganiaq in 2020 was carried out from both underground and an open pit.

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Agnico Eagle Mines Limited - Operations - Operations ...

Mining. Mining concluded at the Meadowbank site in 2019. A conventional open-pit mining operation has been developed at the adjacent Whale Tail and V Zone deposits at the Amaruq site, with ore being transported using long haul off-road type trucks to the mill at the Meadowbank facilities for processing.

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Experimental Study on Grouting Effect and Mechanical ...

Nov 21, 2020  Insufficient compactness of rockfill materials may potentially cause excessive deformation of a concrete face rockfill dam (CFRD), thus resulting in cracking of the face slab and leakage of the dam body, thereby requiring reinforcement treatment. To date, there are no effective measures in strengthening rockfill materials. In this study, self-compacting mortar (SCM) was applied

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Designs For Highwall Safety Bunds In Open Cut Coal Mines ...

Correctly designed and cost-effective highwall bunds are essential for safety in large open cut coal mines Highwall and low wall stability are essential during open cut mining. Geotechnical investigations are required to quantify the mass and substance properties of soils and rocks within the mining

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MINE 480-590Q 201 Lecture 3.2 Tailings disposal methods ...

6 TAILINGS DISPOSAL METHODS - UNDERGROUND BACKFILL • Used to replace excavated zones created by mining operations. • Mine fill is an integral component of a mine design. • Cement mixes are common additive to backfill material to improve strength and stability in underground excavations. • Purpose: • Available voids to fill / and minimize surface impacts and footprints • Need for ...

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Bob Lingga - Edmonton, Alberta, Canada Professional ...

Coal mine open-pit operation • Liaised with planning engineer, surveyor and pump divisions • Conducted, developed and supervised the daily production and mining operation in safe and efficient practices ... Consequently, this study aimed to investigate the complete shear properties of cemented rockfill using direct shear and triaxial tests ...

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Paper: Optimisation of cemented aggregate backfill at New ...

Abstract: Cemented aggregate fill (CAF) and cemented rockfill (CRF) have successfully been used as a low-cost, highstrength backfill material in underground mines. The placement of the material and flowability generally limits the technology to low

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REVIEW OF FILL MINING TECHNOLOGY IN CANADA by K.H.

rockfill was consolidated with a cement-tailings slurry. The resultant cemented rockfill was self supporting when mining the adjacent pillar (12). Cable bolts at the Geco Mine and long bar bolts at the adjacent Willroy Mines Ltd! were first used during the 1960's to reinforce the stope back and walls and the practice was adopted by other mines,

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State-of-the-Art Techniques for Backfilling Abandoned

by in-mine or remote methods, and various point support methods that do not completely fill the mine void and are used for the protection of small areas of the land surface and surface structures. IMining engineer, Pittsburgh Research Center, U.S. Bureau of Mines, Pittsburgh, PA (now with U.S. Department of Energy, Germantown, MD).

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(PDF) Design and implementation of cemented rockfill at ...

3 Implementation of cemented rock fill Cemented Rockfill (CRF) is a mixture of run-of-mine waste rock mixed with cement slurry. Sump mixing with a loader offers the lowest cost form of exposable backfill available for small narrow vein stoping operations.

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Placer Dome Gold Mine - Mining Technology Mining News ...

Cemented rockfill is used in primary stoping blocks and uncemented rockfill in secondary stopes. Longitudinal stopes use conventional longhole benching and are backfilled with waste rock and crushed material from open-pit stripping.

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Mining with Backfill - QueensMineDesignWiki

Mining with backfill is a requirement in the industry as it is an important aspect of many mining methods and is a solution to many rock stability issues. When a mine plans to use backfill there are a number of considerations to be made with regards to type

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Consolidation of underground rockfill for ... - mine smarter

It was recommended that these high-grade sill pillars be extracted earlier in the mine sequence. This reduced the risk of pillars overstressing, and more difficult recovery at the end of mine life. The backfill material above the sill pillars is unconsolidated run-of-mine development waste rock or unconsolidated rockfill

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Major Mines Projects Meliadine Mine

Each stope is backfilled, with cemented pastefill and/or cemented rockfill used in primary stopes and dry rockfill for the secondary stopes. A conventional truck/shovel operation is used for the open pits. Mining at Tiriganiaq in 2020 was carried out from both underground and an open pit.

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Major Mines Projects Nevada Gold Mines Mine

Turquoise Ridge Surface uses conventional open pit mining methods including drilling, blasting, loading, and hauling. South Arturo South Arturo is an open pit and underground project. The primary method of underground mining will be underhand cut and fill with cemented rockfill as the fill material.

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SLOPE STABILITY ANALYSIS FOR OPEN PITS 1

Analyses of a deep wall in an open pit mine in the Peruvian Andes are used to compare limit equilibrium methods (SLIDE) with distinct element methods (UDEC) when the stability is controlled by rock mass strength. The pit wall has an overall slope angle of 37º and a

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Agnico Eagle Mines Limited - Operations - Operations ...

Each stope is backfilled, with cemented pastefill and/or cemented rockfill used in primary stopes and dry rockfill for the secondary stopes. A conventional truck/shovel operation is used for the open pits. Mining at Tiriganiaq in 2020 was carried out from both underground and an open pit.

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Long-Term Stability of a Large Undercut Span Beneath ...

Jun 17, 2018  With the placement of mine infrastructure in undercut entries beneath cemented rockfill (CRF), a better understanding is needed of the long-term strength of CRF and also the long-term stability of CRF undercut spans.

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Underground Mine Backfilling in Australia Using Paste ...

May 13, 2015  Underground mine backfilling is a form of ground improvement that has to be carried out in the mine sites. The backfilling provides ground support and regional stability, thus facilitating ore removal from nearby regions. The large underground voids created by the ore removal are backfilled with the waste tailings in the form of paste fills, hydraulic fills, and others. The tailings are placed ...

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Innovative CRF batch plant design at the Leeville Mine, Nevada

mining methods employ both underhand cut and fill and longhole open stoping. The cemented rockfill (CRF) system provides the primary means of ground support and is a critical element in the mining cycle from both a safety aspect as well as for maximizing the extraction ratio of the highly valuable ore. Team Mixing Technologies was awarded the

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