Overburden Failure Associated with Slicing Mining in a …
With the increasing improvement of national ecological standards, the eco-environmental problems caused by super thick coal seam mining in western China are becoming more and more serious. The failure law of weak overburden stratum is an important factor affecting the safe mining of coal. The failure characteristics of weakly …
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7.3.1: Area Mining | GEOG 000
Overburden removal in US area mining is commonly accomplished with large draglines, stripping shovels, or in small mines, by conventional excavation and haulage (truck …
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5.1.1b: Loading, Draglines, Shovels, and Hydraulic Excavators
Figure 5.1.11: Dragline. Draglines are commonly used to remove the overburden, also known as stripping, in open cast mining. In many cases, the overburden is drilled and blasted to facilitate removal by the dragline. Occasionally, the dragline will be used to remove the ore as well.
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7.3.2: Contour Mining | GEOG 000
Mountaintop removal is another submethod of contour mining where a flat lying coal seam occurs near a mountain top and outcrops on opposite sides of a hill. When the overburden is sufficiently thin (less than 165 feet) across the hill, the deposit can be mined from outcrop to outcrop. In this method the hill is completely removed and the spoil ...
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REMOVAL OF OVERBURDEN
tained by open cast mining and more especially by stripping equipment removing the overburden. As long as the general geological characteristics exist, that an efficient …
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Economical Operation & Estimation of Operating Cost of …
Undetected faults in heavy earth moving machinery (HEMM) are associated with unwanted failures. Dragline is an HEMM used in coal mining for removal of overburden and dumping it into de-coaled area.
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Instability motion characteristics of overburden rock and the …
This paper analyzes the instability movement characteristics of overburden in shallow thick coal seam mining and its influence on the development and distribution of fault fractures. The ...
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Chapter Open Pit Mining
Keywords: open pit mine, slope stability, mine reclamation, stripping ratio, production cycle 1. Introduction Open pit mining is defined as the method of extracting any near surface ore deposit using one or more horizontal benches to extract the ore while dumping overburden and tailings (waste) at a specified disposal site outside the final pit ...
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Stripping Costs in the Production Phase of a Surface Mine
1 In surface mining operations, entities may find it necessary to remove mine waste materials (overburden) to gain access to mineral ore deposits. This waste removal activity is known as 'stripping'. 2 During the development phase of the mine (before production begins), stripping costs are usually capitalised as part of the depreciable cost of
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IAS 16 — Accounting for stripping costs in the production …
An educational presentation was made by Niall Weatherstone, Chief Advisor for Evaluation at Rio Tinto. The presentation clarified the technical and geological aspects of mining as well as significance of the stripping costs, especially in open pit mining. The main aspect of the presentation was treatment of waste and overburden.
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What is Strip Mining?
by Katie Gordon, Associate Editor - The Assay. 7 months ago. Strip mining is a form of surface mining that is employed to strip away a layer or seam of soil, natural vegetation, …
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Modelteststudy onoverburdensettlementlaw incoal …
Based on the slope of the strain curve of mining overburden and the strain value measured by FBG sensors, this paper identified the stability of rock stratum, proposed a FBG-based method to determine the ... Number of the vertical line of FBG strings F01 F02 F03 F04 Distance to the axis of the open-off cut/m (the mining direction is positive ...
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Principles of Surface Mining of Mineral Deposits
Stripping and mining of mineral deposit by deep-kind method are done layer wise (in slices) from the top downwards. ... a system of open-pit fields usually has a common network of haulage lines on the surface and in ... (if feasible) must be adopted, i.e. steeply dipping deposits, advancing into thickening overburden. In surface mining barren ...
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Coal Ratio
Where B = breakeven stripping ratio (overburden per ton of coal) in meter 3, R = market price of coal per ton, P = production cost, including cost of mining and preparation but excludes stripping cost per ton of coal, and S = stripping cost per meter 3 of overburden. Coal mining in under Indian scenario, the above ratio is given as 2.5:1 at ...
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What is Strip Mining?
7 months ago. Strip mining is a form of surface mining that is employed to strip away a layer or seam of soil, natural vegetation, and rocks (known as overburden) to extract the mineral deposits underneath. Unlike underground mining, it is predominately used to access relatively flat sedimentary mineral reserves that are near the earth's ...
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Characteristics of Overburden and Ground Failure in Mining …
Mining can lead to overburden failure and ground damage, which are more severe in mining shallow buried thick coal seams (SBTCS) under thick aeolian sand (TAS). We attempted to discover characteristics of mining in this particular geological condition through theoretical derivation and numerical simulation, and field monitoring. Theoretical …
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IFRIC [X] ACCOUNTING FOR STRIPPING COSTS IN THE …
A mining entity may continue to remove overburden and to incur stripping costs during the production phase of the mine. Stripping costs in the production phase may be part of the routine costs incurred during production. Production stripping costs may also be incurred as part of a systematic effort to gain access to a specific section of ore.
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sand making from overburden
Overburden Stripping The operation of a quarry begins with stripping the overburden (the soil and subsoil above the bedrock). The overburden is stripped with an excavator, dragline, ripper, bulldozer, grader or other earthmoving equipment, and placed in large dump trucks. ... stripping overburden line mining - amastuola.eu. Sand Making From ...
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Dragline
The depth of overburden rock removed by area stripping is governed by dig depth capacity of the equipment utilized for subsequent strip mining. Usually, the prestripping mine plan is arranged in rectangular blocks of overburden to be removed that coincide with pits to be mined by stripping methods underneath the prestripping area …
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Overburden management in open pits: options and limits …
In this line, the study of Liu et al. faces the problem of the thick loose coal seam by applying numerical simulations to predict the geomechanical behavior of the overburden materials [23 ...
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Mining Flashcards | Quizlet
In mining, overburden (also called waste or spoil) is the material that lies above an area that lends itself to economical exploitation, such as the rock, soil, and ecosystem that lies above a coal seam or ore body. Spoils. waste material brought up during the course of an excavation or a dredging or mining operation. Open pit mining.
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Physical Model Experimental Study on the Coalface Overburden …
First, most open-pit coal mines in China adopt zone mining methods, and trucks are transported along the loop line of the end slope and the inner dump overburden side slope. To ensure the stability of the slope, the overall range of the slope angle is only 20°–35° under normal circumstances is common sense in China.
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Journal of the Southern African Institute of Mining and …
The mining sequence is similar to the stripping sequence in conventional opencast: Removal and stockpiling of topsoil material Drilling, charging, and blasting of overburden Push over and pre-stripping of overburden using truck and shovel operation Stripping of blasted overburden with dragline Extraction of S4L coal seam
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Conveyor in a Continuous Surface Mine
several times over the life of a mine to keep transportation costs low [14]. In Figure1, the schematic sections of a continuous surface mine show the three typical technological layouts of removing volumes of overburden downhill to the dumping levels. The overburden removed from the upper overburden levels is often placed down
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Surface Coal Mining Methods in Australia
Fig. 3. Overall mining sequence of a typical surface coal mine in Australia (after Westcott et al., 2009). 2.1 Dragline method Dragline is the predominant mach ine which is used to remove the overburden and expose the coal when the deposit s characteristics match the draglines physical capabilities. Once
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Overburden Stripping
Overburden Stripping. The operation of a quarry begins with stripping the overburden (the soil and subsoil above the bedrock). The overburden is stripped with an excavator, dragline, ripper, bulldozer, grader or other earthmoving equipment, and placed in large dump trucks. This process is repeated as the faces advance.
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(PDF) Underground and Opencast Coal Mining Methods in …
The underground method is suitable for extraction of deeper coal seams, whereas opencast method is suitable for shallow coal seams. However, due to less production cost, mechanisation, and less ...
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Applicability of blast casting technique in strip-mining …
The blast casting technique of removing overburden is an innovative technique which is successfully used in the mining of certain surface coal and quarries. This method is efficient in minimizing the labor and equipment cost, while safely accelerating mining operations. In Jordan, phosphate mining by dragline is widely used for stripping …
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Surface Mining Methods and Systems | SpringerLink
The walking dragline is the preferred machine for strip mining because the dump radius is greater, therefore it digs in thicker overburden or competent overburden with flatter …
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Strip mining | Surface Mining, Reclamation & Restoration
strip mining, removal of soil and rock (overburden) above a layer or seam (particularly coal ), followed by the removal of the exposed mineral. The common strip-mining …
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