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Evaluation of rock stability challenges affecting the …

The strike length of the orebody in the BC mine is roughly 124 m at the pit bottom, with the length extending further as the orebody descends into the …

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(PDF) Surface Mine Design

distance of 200 ft. is represented by a length of 1 inch on the map. o In the Metric system, for example, 1:1000 scale means 1000 m of actual distance on the ground is represented by a 1 m ...

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Strategic sill pillar design for reduced hanging wall overbreak in

As can be seen, the orebody is shallow; it is only 35 to 55 m below ground surface. It is open in depth, however, the current mine plan is for the upper portion of 230 m. The strike length of the deposit is approximately 550 m in NW-SE direction, and has a dip of 75° to the SW direction.

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Geomechanical effects of stress shadow created by large …

The orebody is mined transversally, such that the stope strike length is along the orebody thickness. The stope dimensions are 12 m × 15 m × 30 m (strike length × thickness × height). The destress panel dimensions are 15 m × 3 m × 60 m (orebody strike × thickness × height). The model boundary is set 160 m away from the pillar, such …

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Strategies for surface crown pillar design using numerical …

It appears that larger shear displacements occur on the fault that is parallel to the orebody strike compared to the cross fault. Previous article in issue; Next article in issue; Keywords. Surface crown pillar design. ... Specific to the vein geometry, the strike length of the deposit is approximately 550 m in NW-SE direction, ...

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Costs and net profit Given the following | Chegg

Strike length of orebody: 485 m. Grade of gold ore: 8.2 g/tonne. Dilution: 0 %. Gold bullion selling price: $1150/oz. Mill recovery: 92%. Milling cost: $32 /tonne. Tax rate: 32%. The orebody outcrops at the surface. The existing surface is flat/level. When underground mining at this operation should be contemplated, calculate:

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Solved With reference to the massive hypothetical ore-body …

Question: With reference to the massive hypothetical ore-body below, estimate the dip, the strike length and the tonnage, given SG of 2.3 and thickness of 52 m. With given reasons, select the mining method to be applied for this hypothetical ore body Describe five factors to be considered before mining this hypothetical ore-body

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Odysseus Project, Cosmos Nickel Complex, Australia

The Odysseus south orebody extends 360m in strike length with an average thickness of 62m while the Odysseus north orebody lies 100m north of the south orebody and at a depth of 1,000m-1,075m below the surface. Both the orebodies occur in the same mineralised trend similar to that of the mine's Alec Mairs 5 (AM5) and AM6 …

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Study on Surface Deformation and Movement Caused by …

The X direction of the model was perpendicular to the strike direction of the orebody, with a length of 1400 m. The Y direction of the model was the strike direction of the orebody, with a length of 1500 m. ... The range of surface movement is from profiles 60 to 20 along the orebody strike. (2) After mining sublevel 12, the movement range of ...

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Orebody geometry in lode gold deposits from Zimbabwe: …

Orebody geometry (shape and orientation) needs to be well understood and described quantitatively in order to be useful in investigations of fluid flow and …

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Orebody geometry in lode gold deposits from Zimbabwe: implications …

Measurements made from sections, such as strike length, strike orientation (e.g. from level plans), or down-dip length and dip amount (e.g. from vertical cross-sections) will be arbitrary sections through an orebody (see below), and therefore have little significance for characterising its true geometry.

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Evaluating the Influence of Underground Mining Sequence

The orebody strike length is about 200 m towards 25° NE and dipping at 7° on average. The total depth along the dip to be excavated is around 100 m and the mining region is segmented into 3 levels separated by sill pillars. Every level consists of stopes measure of 10 m in height and 20 m in length. In each level, the primary stopes …

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Tigers Realm Coal (TIG)

Tigers Realm Coal recently completed 6000 metres of drilling at Project F, extending the orebody strike length from three kilometres to 11.6 kilometres, Hartleys said.

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Large Loop Turam Electromagrietic Survey of the Woodlawn Orebody

At Woodlawn the leading edge of both loops used in this survey was approximately 150m from the nearest edge of the orebody and the length of the loop was somewhat longer than the strike length of the orebody which is approximately 300m.

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Deposit Portal

Orebody 24 is located to the WNW of Orebody 23, on the same steeply-dipping to overturned northern limb of the Newman Anticline. It is separated from Orebody 23 by a gap of ~1 km, and extends over a strike length of ~9 km within the Brockman Iron Formation Dales Gorge Member.

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Major Mines & Projects | Mountain Pass Mine

The currently defined zone of rare earth mineralization exhibits a strike length of approximately 2,750 ft (850 m) in a north-northwest direction and extends for approximately 3,000 ft (930 m) downdip from surface. ... The total orebody strike length is approximately 2,750 feet (ft) and dip extent is 3,000 ft; true thickness of the more than 2. ...

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Geomechanical effects of stress shadow created by large …

The orebody is mined transversally, such that the stope strike length is along the orebody thickness. The stope dimensions are 12 m × 15 m × 30 m (strike …

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Oblique distribution patterns and the underlying mechanical …

In northeastern Yunnan ore concentration area, the main ore-bearing faults that control the distribution of the main orebodies are the interlayer compressional-torsional and torsion-compressional faults of the hanging wall anticlines of the NE-trending syncline thrust strike-slip fault–fold zone, making the downdip length an orebody group ...

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Factors Influencing Ore Recovery and Unplanned Dilution in …

The average true thickness of the orebody is 9m and strike length is 11km. Above the 720m level, a barren gap exists between Shaft Number 3 and Shaft Number 4 and the rocks do not bear any mineralisation. Shaft Number 4 orebody extends from 3000mN to 860mS on the south. The major fault at Number 4 shaft is the Luansobe fault and minor Kakosa ...

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Strike

Here a drift follows the strike of the orebody with various stopes above throughout its course. Adit Chute Collar Country Rock Cribbing Crosscut Crusher Deposit Dip: Drift Exploration Fault Footwall Grizzly Hanging Wall Headframe Hematite: Hoist Incline Inclined Shaft Level Magnetite Outcrop Ore Ore Pass: Orebody Overburden Pillar Pinch Pitch ...

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(PDF) Orebody geometry in lode gold deposits …

Orebody geometry in lode gold deposits from Zimbabwe: implications for fluid flow, deformation and mineralization ... Measurements made from sections, such as strike length, strike orientation (e.g. from level …

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2 SLICE METHOD

Figure 2 ‑ 53 depicts 10m strike-length full stopes, while Figure 2 ‑ 54 and Figure 2 ‑ 55 provide examples of the grid and interval approaches, respectively. ... If the cell filling plane is not generally aligned with the orebody strike then there is potential for anomalous results to occur. This is particularly true if the cell ...

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Oblique distribution patterns and the underlying mechanical …

The Maoping Ge-rich Pb–Zn ore field is located at the intersection of the NE-trending Huize–Niujie oblique thrust–strike-slip fault–fold belt, the N–S-trending …

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A Review of Sublevel Stoping

widths. Length and width are the critical stope dimensions, as they also control the dimension of the stope crowns. Bench stopes are excavations where the longest dimension is the strike length and the critical spans are usually the exposed heights as the orebody width is usually narrow. 578 Brisbane, Qld, 29 October - 2 November 2000 MassMin 2000

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Text: Costs and Net Profit Given the following information: …

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Khoemacau Copper Project, Botswana

The orebody with more than 4km strike length made it necessary to split the strike into mining corridors with twin decline systems servicing each corridor with exception of the North Corridor that starts as …

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Pillar extraction at Rajpura-Dariba.

The orebody strike length, nearly 500 m, was divided into eight primary, seven secondary and 17 tertiary panels. Each of the 15 m wide panels was developed with 8 m wide cross-cuts up to the orebody width, at all the three levels, to serve the corresponding drilling or extraction purposes. A hangingwall drive at the 250 m level acts …