backfilling backfilling mining method

Backfilling in the underground mining industry

The effects of chemical additives such as superplasticizers, high-early-strength cements, water-reducing agents, and kiln dust will be examined. With further refinement, an accurate predictive tool will be developed that will assist the industry in analyzing the suit¬ability and stability of dewatered, total-tailings backfill.

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The Differences in Underground Mines Dewatering with the ...

Mining methods using backfill were introduced to the mining industry mainly to increase the ore recovery and to improve the grade factor by decreasing the dilution. However, many additional beneficial mining and environmental factors accompany the introduction of backfilling: reduced ground movement, prevention of ground failures, ...

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State-of-the-Art Techniques for Backfilling Abandoned …

Surface subsidence induced by underground mining is one of the challenging problems in mining engineering, which can destroy ground surface buildings and cause huge economic losses to the mine. In this study, a two-dimensional numerical model, established by the discrete element method code PFC2D, was adopted to investigate the mechanical mechanism of surface subsidence and backfill …

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Method of Soil Backfill of Trenches – Method Statement HQ

: Experimental and Analytical Studies to Achieve an Optimised Cemented Backfill Mix to be Used in a Cut-Fill Mining Method . 4.2. Analysis. A schematic of the multi-slice cut-and-fill mining method is depicted in Figure 5, with respect to this method; ore to be …

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Tailings.info Backfill of Tailings to Underground Workings

Backfilling has been used increasingly in underground mines as a support medium in/around mining areas. The mining method known as cut-and-fill, which incorporates backfilling in its operational cycle, is ranked as a major method of underground mining. Even the room-and-pillar mining and sublevel stoping methods also

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Assessment of Hydraulic Backfilling in Metal Mines within ...

A review of underground mine backfilling methods with emphasis on cemented paste backfill ... the backfilling mining ... various methods of backfilling the post-mining voids with waste utilization ...

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Strata behavior at fully-mechanized coal mining and solid ...

Define backfill. backfill synonyms, backfill pronunciation, backfill translation, English dictionary definition of backfill. n. Material used to refill an excavated area. tr.v. back·filled, back·fill·ing, back·fills 1. ... The influence of the filling mining method on the …

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Special Issue "Backfilling Materials for Underground Mining"

This method statement defines the methodology for execution of backfilling and compaction procedure related to earthwork & to describe the sequence of activities, utilization of resources, documents & drawings involved, maintaining & recording documents & data to meet project specific & contractual obligations and risk assessment for the activities involved.

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Edumine | Underground Mine Backfill 1 - Introduction

During the roadway backfill mining method, when the backfill mining roadway was not filled by any backfill material, the overlying strata were supported by the unexploited coal pillars on both sides and the backfill material together. In this phase, the unexploited coal pillars has to be stable to ensure a safe working environment.

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Backfilling Techniques and Materials in Underground ...

Experience in mining in the world indicates that an increasing number applied sublevel mining and open stope mining methods with backfilling the excavated zone with cemented backfill. The most suitable conditions and justification for the economical use of backfilling mining methods with cementing fill are in large deposits (Milićević, 2011).

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POSSIBILITY OF APPLICATION OF BACKFILL METHODS WITH ...

Technology Overview as part of a Web-based Technical and Regulatory Guidance. Backfilling and Subaqueous Disposal. 1. Introduction Click Here to view case study table at the end of this document. Backfilling and subaqueous disposal technologies can be effective treatment alternatives for remediation of solid mining wastes and mining-influenced water (MIW).

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Mine Backfill - MiningInfo

Considering the deep mining heat-hazard problem, the concept and academic idea of cold load and storage (CLS) functional backfill applied on deep mine cooling was put forward. Firstly, according to characteristics of filling mining, a method of cooling stopes with CLS phase changing backfill which is made from the backfill material with CLS phase change material (PCM) was proposed. The working ...

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Moving set‐up room theory of weakening the mining …

Jul 24, 2017· Numerical modelling is broadly used for assessing complex scenarios in underground mines, including mining sequence and blast-induced vibrations from production blasting. Sublevel stoping mining methods with delayed backfill are extensively used to exploit steeply dipping ore bodies by Canadian hard-rock metal mines. Mine backfill is an important constituent of mining process. …

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Reliability analysis and design of backfill in a cut-and ...

Jan 10, 2020· Underground Mine Backfill 2 - Slurry, Paste, and Rock Fills is the second in a set of two Underground Mine Backfill courses. This course reviews each backfill type and its preparation, distribution, stope preparation and placement practices as …

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A numerical evaluation of continuous backfilling in ...

Jul 30, 2018· Backfilling will be done using the approved fill material or select granular material as per drawings. Each layer will be compacted to a dry density, depending on the area of working. When granular material is used, it will be compacted to a firm and stable condition using an appropriate compacting device.

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CO2 sequestration characteristics in the cementitious ...

Paste Backfill. Paste backfill is a high density backfill (>70% solids depending on SG). In order to pump material at this density, a component of fines is required. As a general rule, the fines content (<20 micron) should be a minimum of 15% by weight; The slump of paste backfills is …

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Mining with Backfill - QueensMineDesignWiki

Jun 05, 2011· The method statement by which the excavation and backfill with suitable fill is carried out. PLANT, MACHINERY AND EQUIPMENT -Excavator, Dump Truck, Dozer, Compactor and …

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Stability analysis of surrounding rock and pillar design ...

The selection of the type of backfill is a substantial component of backfill design at preliminary stage of mining production. This paper presents a review of backfill practices with emphasis on backfill operations in North America.

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A Review of Underground Mine Backfilling Methods with ...

Oct 15, 2019· Underground Mine Backfill 1 - Introduction is the first in a set of two Underground Mine Backfill courses. This course is intended as an introduction to mine backfill properties, types, uses, mining methods and system layout. Underground Mine Backfill 2 - Slurry, Paste and Rock Fills reviews each backfill type and its preparation, distribution, stope preparation and placement practices as well ...

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Backfill - definition of backfill by The Free Dictionary

Rock backfill method is an economical back filling method which is feasible and applicable in some but not all cases in underground mining. This method decreases waste material on surface the

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Method Statement for Excavation Compaction and Backfilling ...

Dear Colleagues, Backfilling of mined-out areas is a fundamental component of many underground mining operations. The backfill material provides support to the surrounding rock mass, reduces wasteful dilution, enables a safe working area for production activities and mitigates the risk of …

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Cold Load and Storage Functional Backfill for Cooling Deep ...

Jul 31, 2019· This method statement describes a proper work procedure shall be carried out during the backfill Work of soil. Earthwork forms a part of the installation procedures of box culverts, retaining walls, foundations, and substructures. In order to ensure an adequate foundation for such structures, backfill material must meet certain specifications and be compacted by acceptable methods to adequate ...

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Numerical modelling approach for mine backfill | SpringerLink

the application of solid backfilling mining method has been ex-tended to frontier scientific issues in the field of coal resource exploitation such as deep mining,14 waste-free mining,15 and safe mining of coal and associated resources.16 As far as solid backfilling mining is concerned, the relevant theories in-

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US4101333A - Method of mine backfilling and material ...

Considering that backfilling mining technology plays a significant role in the protection of the environment during the recycling of industrial waste, such as tailings, slag, fly ash and ardealite [6–8], and that the requirements of strength and stability of cemented paste backfill (CPB) are relatively low, backfilling CW into the stope ...

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Backfill Practices for Sublevel Stoping System | SpringerLink

A method of backfilling in underground mine operations by a mill tailings slurry which is dewatered to provide a material with a controlled water content to permit the dewatered material to be used as a backfill without requiring any substantial dewatering after placement and which material can, when desired, be mixed with selected quantities of cement to provide a mortar for backfilling or ...

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Numerical Simulation of Surface Subsidence and Backfill ...

Mine backfill is soil, overburden, mine tailings or imported aggregate material used to replace excavated zones created by mining operations. Mine fill is an integral component of mines' design and method with many operations utilizing backfill as a means to aid the stabilization of mining-related voids and the disposing of mining wastes.

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