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Transition from discontinuous to continuous paste filling ...

The cemented paste fill allows for a continuous retreating sequence between primary and secondary (or tertiary) stopes. Backfilling is an integral part of the mining cycle; consequently a reliable and productive paste fill system is required with integration between both surface infrastructure and the underground paste filling …

Backfilling technologies for Estonian oil shale mines

2013-7-2 · 1. Underground and surface mining space mod-elling. 2. Tests for the fill material. 3. Determination of technological schemes for backfilling. 2.1 Underground and surface mining data col-lection and modeling Site analyses have been carried out for deter-mining potential backfilling conditions. For that purpose a geological and technical model has

A roof model and its application in solid backfilling mining

2017-1-1 · 1. Introduction. Solid backfilling mining () is a green mining technology in which the solid waste materials is placed into the gob to support the overlying strata and to control roof''s subsidence and movement,, . has been successfully used in several mines to solve many problems, including coal extraction under buildings, water bodies and railways, surface subsidence, and ...

Mining | High performance mixing plants and kerbing ...

mining site visits, inspections and condition reports Inspections not only enable customers by providing them with the tools to improve mixer output and overall performance but Aran utilizes information collected to continue to innovate our continuous mixing equipment, staying ahead of the industry.

Ventilation System Design for a Thin-Seam Mining Panel

2020-11-4 · The continuous miner advances forward cutting coal, to form the production stalls, until it emerges in the return entry. As the coal is cut, it is gathered by the miner and ... Another reason for back filling is ventilation control. With this mining layout, as it is planned, backfill will be needed to fully close off the mined out stalls. This ...

TECHNOLOGY FOR BACKFILLING OF THE MINED-OUT …

2017-10-16 · backfilling, the technology for backfilling of the mined-out areas has passed through the following stages: Stage 1: Until 2008, ore mining was carried out through pri-mary chambers where the sterile rock mass, generated by the driven mining workings in the mine, was temporarily stored. Stage 2: In 2007, an installation for the production of cement

Paste Backfill Fundamentals

2018-5-11 · Paste backfill is prepared by dewatering flotation tailings from a lead-zinc concentrator. The tailings are partially classified with a hydrocyclone to increase thickening and filtration rates. After thickening to 65% solids, a standard vacuum drum …

Experimental study on roadway backfill mining of paste ...

2021-3-26 · Roadway backfilling mining is vital for ensuring the safety of surface buildings while mining coal underneath buildings, railways, and water bodies. The technique and backfilling material, however, need to be optimized to ensure the long-term safety of the project and surface structures. Using a mine as the engineering background, reasonable strength, an optimal ratio of backfilling materials ...

Overlying strata movement law of continuous mining and ...

2021-10-6 · Overlying strata movement law of continuous mining and continuous backfilling cemented-fill Environmental Earth Sciences ( IF 2.784) Pub Date : 2021-10-05, DOI: 10.1007/s12665-021-09993-w Lin, Hai, Yang, Renshu, Lu, Bin, Li, Yongliang, Fang, Shizheng, Fan, Ziyi, Li, Zhuangzhuang

Highly homogenous backfilling and landfilling

When a mining deposit is exhausted, the cavities created can be filled with suspensions or slurries, among other things. Our mixing systems operating in continuous or batch mode have proven their worth many times over in this field. A high degree of mixture homogeneity in combination with a high degree of binder liberation ensures stability.

Underground Mining Methods and Equipment

2020-8-25 · UNESCO – EOLSS SAMPLE CHAPTERS CIVIL ENGINEERING – Vol. II - Underground Mining Methods and Equipment - S. Okubo and J. Yamatomi ©Encyclopedia of Life Support Systems (EOLSS) 2. Strength of the hanging wall, footwall, and ore body. 3. Economic value of the ore and grade distribution within the deposit.

Backfilling in the underground mining industry

2014-3-5 · Backfill is used in the mining industry for several reasons. • Ground stabilisation. • To extract ore from adjacent or under another block of ore/stope. • To extend the life of the mine. • To lower the cost of mine closure. (Environmental). There are several different types of filling techniques used in the mining …

ATTITUDE ADJUSTMENT OF BACKFILLING SUPPORT …

2020-9-9 · Hydraulic support is one of the fundamental tools for underground coal mining. In the underground mining process, there are two main methods of goaf management – caving method and backfilling method [3]. The latter, as a representative of green mining, is a dominant development direction of the coal industry.

Research on Continuous Miner Mining with Backfilling ...

 · Aiming at the mining seam with large burial depth, strong geostress, large deformation of the roadway, and fast deformation speed, in order to efficiently recover the coal resources at the working face and effectively protect the surface buildings. Based on analyse of the law of the appearance of the underground roadway pressure in the relevant working face, combined with continuous miner ...

Experimental Study on Mine-Loess and Fly Ash Backfilling ...

In order to reduce the cost of backfilling materials in north-west mining area, the feasibility of making the loess as backfilling material in coal mine was discussed in this paper, an orthogonal experiment were conducted and the ratio of backfilling material is gained by author. The experiment was based on the material as main material: loess with fly ash, auxiliary material:cement with lime ...

Cemented Filling Mining Technology in Continuous Miner ...

Based on interval arrangement characteristics of the mined branch roadways and pillars in continuous miner filling mining gob,the cemented filling mining thought which divided mining and filling both into two stages was put forward.The first stage was mining branch roadways and then filling gob with cemented materials in time, and the second stage was mining pillars and filling gob with the ...

Backfilling Techniques and Materials in Underground ...

2012-3-29 · Backfilling Techniques and Materials in Underground Excavations: ... As part of the continuous process of re-evaluating backfilling options in order to provide the best options possible, placement methods and materials that have been ... Schematic showing dry filling in mining.....48 Figure 5-16. Slinger-type RPF placement equipment and ...

Paste Thickening and Backfill Mineral Industry Solutions

2021-10-26 · Paste Thickening and Backfill. The advantages of paste thickeners in tailings circuits have been well-established for most minerals. The type of paste thickener underflow generally used for surface stacking of tailings is called "thickened tailings.". Thickened tailings are a suspension of solids which are relatively non-settling and non ...

Key progress on the filling mining of deep resources in ...

Mining and backfilling also needs to be balanced to increase mechanization and automation for higher mining rate and lower dilution rate, and to realize efficient mining at low cost. (3) Continuous stoping in large area: cemented undercut-and-fill mining is adopted in Jinchuan deposit.

Study and application of coal mining with partial backfilling

For the technology of coal mining with backfilling,how to improve the coal mining efficiency with backfilling and reduce the backfilling cost are the problems that need in-depth and continuous studies. The partial backfilling technology,which was proposed based on the characteristics of layered strata movement and its control requirements,provides an important way to solve the above problems.

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Overlying strata movement law of continuous mining and ...

2021-10-5 · Aiming at the problem of mining coal resources under the Yuxing Mine Ecological Park in Inner Mongolia, China, we adopted a continuous mining and continuous backfilling (CMCB) cemented-fill mining method; based on the systematic description of the mining and backfilling craft of the CMCB mining process, comprehensive use of theoretical analysis, numerical simulation, and similar …

BACKFILL PRODUCTION: PASTE AND HYDRAULIC

For the paste fill system, mucking time increases in Scenario 3 & 4, and the increased amount of drilling allows the amount of mucking to increase by about 30%. Mine production is constrained by the backfill rate. Since the overall fill rate of paste is faster …

How to become a Miner

An underground miner travels down vertical shafts or sloping declines to reach the workface. Duties may include rockbolting the walls and roofs of mines, building timber or steel props, pillars or arches to support the rock and back-filling mineral voids. Mine Shift Supervisor. A mine shift supervisor regularly inspects mine sites (both above ...