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    State-of-the-Art Techniques for Backfilling Abandoned Mine ...

    sonnel to enter the mine. This type of backfilling opera-tion istermed "blind"or "remote." It differs from in-mine backfilling techniques in that the remote method is typ-icallyperformed through a borehole without placing any equipment into the mine except for the material injection pipe and nozzles. In-mine techniques utilize operators in-

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    Design and application of solid, dense backfill advanced ...

    Jan 01, 2015  Compared to the strip mining method, the backfill advanced mining method has a better recovery rate which increases from 40% to 85%, and the new method is capable of producing more than 72000 tons of raw coal. 3. Key equipment for backfill mining

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    Mine Backfill Services - Paterson Cooke

    Paterson Cooke Mine Backfill Services Paterson Cooke Paterson Cooke is a recognised leader in the design and implementation of mine backfill systems and associated processes. Since its formation in 1991, Paterson Cooke has consistently provided technologically advanced systems for projects located throughout the world.

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    Backfilling Mining Stopes

    Stope filling has been discussed by Jackson in an earlier paper. Filling long has been recognized as the most effective method of permanently supporting the walls of mine workings and minimizing movement and subsidence. It is used alone in cut-and-fill stoping and in conjunction with framed timbers in square-set stoping for support of weak walls during the working of the

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    Backfilling in the underground mining industry

    Mar 05, 2014  Backfilling in the underground mining industry 1. BACKFILLING IN THE UNDERGROUND MINING INDUSTRY. By Ray Brown. I have often been asked by people outside the mining industry what backfilling is and why it is necessary to the industry.

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    A Review of Underground Mine Backfilling Methods with ...

    An example of hydraulic backfill is backfilling voids that arecreated in room and pillar or bord and pillar underground mining methods in coal mines in

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    (PDF) Backfill mining practice in China coal mines

    Different types of backfill mining technology are presented in detail, including paste backfill mining, waste rock backfill mining, high water material backfill mining and partial backfill mining.

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    Surface mining - Wikipedia

    Surface mining, including strip mining, open-pit mining and mountaintop removal mining, is a broad category of mining in which soil and rock overlying the mineral deposit (the overburden) are removed, in contrast to underground mining, in which the overlying rock is left in place, and the mineral is removed through shafts or tunnels.. Surface mining began in the mid-16th

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    Strip mine owner with history of violations asks state to ...

    Jul 13, 2015  Alton Coal Development's Coal Hollow Mine is Utah's only strip mine. Company managers are hoping for state approval of expansions that will double the mine's output to nearly 1 million tons. At the same time, Alton has racked up a series of violations at the 500-acre operation ó including not backfilling mine pits, reconstructing a creek and ...

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    Mining scheme design for super-high water backfill strip ...

    Jun 15, 2016  Considerable coal resources are buried under buildings in No. 5 mining area of Hengjian Coal Mine, which greatly shortens its service life. Working on the premise that the degree of mining-induced damage to surface buildings should not exceed the protective indicator, the mine proposes to use super-high water backfill technology so as to ensure maximum

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    Ground Control Monitoring in Backfilled Strip Mining under ...

    Jul 07, 2018  Ground subsidence and coal gangue induced by mining activities could significantly influence the nearby environment. To allow strict public scrutiny of mining under the metropolitan district, coal gangue backfill has been introduced together with the strip mining method to minimize ground subsidence and to reduce gangue disposal in Tangshan Mine in

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    Backfilling Trenches and Other Excavations

    Jan 22, 2021  Backfilling is the process of putting the soil back into a trench or foundation once excavation, and the related work has been completed. The backfill process requires skills and heavy equipment as well as knowledge of the specifications, contract requirements, and

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    (PDF) Design and application of solid, dense backfill ...

    The engineering practice of Chengjiazhuang Coal Mine shows: the function relational expression of backfill body’s density is ρ = ρ0(4.94 + 1.85hd − 0.15β + 0.16n)/(hdk), so when coal ...

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    Experimental Investigation on Mechanical Properties of In ...

    In order to recycle the residual strip coal pillars, backfilling mining technique was introduced to the coal mine. The first field trial region was selected in the 2300 mining district, and the coal pillar between 2302 and 2303 panel was the targeted object, as shown in Figure 1. The dimensions of coal pillar were 110 m × 960 m (width × length).

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    Coal mining - Choosing a mining method Britannica

    Coal mining - Coal mining - Choosing a mining method: The various methods of mining a coal seam can be classified under two headings, surface mining and underground mining. Surface and underground coal mining are broad activities that incorporate numerous variations in equipment and methods, and the choice of which method to use in extracting a coal seam

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    Major Mines Projects Dawson Mine

    Heavy mobile equipment. HME type, model, size and quantity. ... Dawson mine is a large open-cut coal mining operation in Queensland that historically had been operated as a strip mine, with multiple draglines exposing coal in a westerly direction and dumping spoil to the east. ... This included backfilling depleted open pits, which involved ...

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    Major Mines Projects FMG Mine

    Typically, strip mining involves pits being developed in thin strips, around 150-200 m wide by 800 m long. Each mining area is mined to suit a particular set of constraints and requirements. When mining commences in a new pit, the overburden is removed from the first two adjacent strip and placed just beyond the ore body limits close to the ...

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    Strip mine owner with history of violations asks state to ...

    Jul 13, 2015  Alton Coal Development's Coal Hollow Mine is Utah's only strip mine. Company managers are hoping for state approval of expansions that will double the mine's output to nearly 1 million tons. At the same time, Alton has racked up a series of violations at the 500-acre operation ó including not backfilling mine pits, reconstructing a creek and ...

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    Underground Mining Methods — New Pacific Metals

    In 2005, only 17% of metal mines were underground operations (Raw Materials Data, Stockholm 2010) – but there are many instances where underground extraction of minerals is more cost-effective than surface mining, typically when the given ore body is high grade or very deep.

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    Cost of Reclamation and Mine Drainage Abatement: Elkins ...

    The 977 traxcavators were used as a combination hi-lift to ex- plore the strip pits for buried deep mine openings and as a root rake to clear areas prior to backfilling. Utilizing this equipment during the winter months was difficult which resulted in considerable vari- ation in the cost per hour as shown on Table III.

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    17.4.724 : FEE ASSESSMENT CATEGORIES: STRIP AND ...

    17.4.724 FEE ASSESSMENT CATEGORIES: STRIP AND UNDERGROUND MINE RECLAMATION. The Strip and Underground Mine Reclamation Act categories are as follows: (1) Prospecting categories, include, but are not limited to: access rights; land acquisition; application information and preparation; bonding; license fees; resource data inventories; professional services and evaluations; equipment

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    U.S. Department of the Interior Bureau of L nd Management ...

    Figure XI-2, Equipment Slope Workability Graph XI-5 1. Special Considerations for Open Pit Mining XI-6 Figure XI-3, Typical Open Pit Mine . . . . . . . XI-7 2. Technical and operational Aspects of pit ... Figure IX-4, Surface Strip Mine Backfilling IX-9 Figure XI-s, Scree Slope Backfilling •..... XI-10 6. Effects of Concurrent Backfilling ...

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    Jimmy Hoffa in picture up to his disappearance in July ...

    Feb 05, 2021  — State-required bonding on Blue Coal strip mine permits never exceeded 10 percent of the cost of doing the backfilling that the company ultimately left unfinished. ... Coal's mining equipment ...

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    Mining scheme design for super-high water backfill strip ...

    Jun 15, 2016  Considerable coal resources are buried under buildings in No. 5 mining area of Hengjian Coal Mine, which greatly shortens its service life. Working on the premise that the degree of mining-induced damage to surface buildings should not exceed the protective indicator, the mine proposes to use super-high water backfill technology so as to ensure maximum

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    Surface subsidence prediction method of backfill-strip ...

    Mar 15, 2019  Intensive and massive coal mining causes a series of geological hazards and environmental problems, especially surface subsidence. In recent years, backfill-strip mining has been applied to control mining subsidence in order to realize sustainable development of the mining environment. To accurately predict the surface subsidence of backfill-strip mining, a

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    405 KAR 1:130. Backfilling and grading, Chapter 1. Strip ...

    Strip Mining of Coal 405 KAR 1:130. Backfilling and grading ; Latest version. Section 1. In order to achieve the approximate original contour, the permittee shall, except as provided in this administrative regulation, transport, backfill, compact (where advisable to ensure stability or to prevent leaching of toxic materials), and grade all ...

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    Chapter 6: Monitoring A Strip Mine - The Strip Mining Handbook

    Backfilling and grading (as well as other reclamation activities such as topsoil replacement and revegetation) generally must take place as soon as is practicable after mining. This usua lly means that where mining occurs in adjacent pits, an operator should remove the coal from the first pit before opening the next pit in order to use the ...

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    U.S. Department of the Interior Bureau of L nd Management ...

    Figure XI-2, Equipment Slope Workability Graph XI-5 1. Special Considerations for Open Pit Mining XI-6 Figure XI-3, Typical Open Pit Mine . . . . . . . XI-7 2. Technical and operational Aspects of pit ... Figure IX-4, Surface Strip Mine Backfilling IX-9 Figure XI-s, Scree Slope Backfilling •..... XI-10 6. Effects of Concurrent Backfilling ...

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    Surface Mining Techniques used in the Oil Sands Oil ...

    SURFACE MINING ≠ STRIP MINING: Although sometimes mistakenly referred to as strip mining, oil sands is actually mined from an open-pit below several meters of overburden.Strip mining is the mining of a relatively flat deposit very close to the surface, commonly used in coal or phosphate industries.

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    Wildlife Foodplot on Reclaimed Strip Mine

    Feb 07, 2010  The soils on the site are very compact and rocky, as you would expect on a reclaimed strip mine. I'm looking into buying an implement to loosen the soil, but i'm unsure what would be the best choice given the nature of the soil (ex. 1 or 2 bottom plow, chisel plow, subsoiler, ripper, tiller, ).

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    Strip mine owner with history of violations asks state to ...

    Jul 13, 2015  Alton Coal Development's Coal Hollow Mine is Utah's only strip mine. Company managers are hoping for state approval of expansions that will double the mine's output to nearly 1 million tons. At the same time, Alton has racked up a series of violations at the 500-acre operation ó including not backfilling mine pits, reconstructing a creek and ...

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    Major Mines Projects Chichester Hub Mine

    Mining will continue to be undertaken using the same mining methodology currently in place, consisting of conventional truck and shovel mining and strip mining. Typically, strip mining involves pits being developed in thin strips, around 150-200 m wide by 800 m long. Each mining area is mined to suit a particular set of constraints and ...

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    Hambach surface mine - Wikipedia

    The Tagebau Hambach is a large open-pit coal mine (German: Tagebau) in Niederzier and Elsdorf, North Rhine–Westphalia, Germany.It is operated by RWE and used for mining lignite.. The mine is on the site of the ancient Hambach Forest which was purchased by RWE in 1978. They then cut most of it down and cleared it to mine. Only 10% of the forest area remains.

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    Uranium: How is it Mined?

    Open Pit Mining. Open pit mining, also known as strip mining, is the removal of surficial soils and uneconomic rock to get at the ore below. Ore grades are normally less than 0.5%. This is type of mining is only possible if the uranium ore is near the surface (normally less than 400 ft).

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    Coal mining - Underground mining Britannica

    Coal mining - Coal mining - Underground mining: In underground coal mining, the working environment is completely enclosed by the geologic medium, which consists of the coal seam and the overlying and underlying strata. Access to the coal seam is gained by suitable openings from the surface, and a network of roadways driven in the seam then facilitates the installation of

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    ENVIRONMENTAL QUALITY RECLAMATION

    Strip and Underground Mine Reclamation Act: Backfilling and Grading Requirements . Rule 17.24.501 General Backfilling and Grading Requirements . 17.24.501A Final Grading Requirements (REPEALED) 17.24.502 Cut-and-Fill Terraces . 17.24.503 Small Depressions . 17.24.504 Permanent Impoundments

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    Environmental Protection in Surface Mining of Coal

    Backfilling of all auger areas should be to the approximate original contour, or all highwalls should be reduced to a slope of 35° or less. If the^operation is below drainage, a water impoundment may be granted for the final pit as an alternative plan for backfilling. ... An Analysis of Strip Mining Methods and Equipment Selection.

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