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ENGG851 Systems Design And Engineering

tag 0 Download 14 Pages / 3,276 Words tag 20-03-2021
  • Course Code: ENGG851
  • University: Macquarie University
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  • Country: Australia

Question

Research Desgin

a) Restate the research question outlined in your introduction and why it is important .
 
b) Related Work Select two research designs from the literature that you have read related to your research question. For each paper in about  explain the research design, the strengths and limitations of the design and how this design will be useful to support your research design.
 
c) Design , What research design will you use to answer your research question ? That Is, experimental, quasi experimental, .trelatMnal, ethnography etc. 
Explain your design. For example, outline,. control and experimental groupings, the number of samples y. need, and how you will determine the accuracy of your results. 
 
Why did you select this design? What are the strengths and limitations of thh design A relation to your research ? 

Reference Number: 1

What was the research question? Emplacement of mine rejects in underground voids: technologies and challenges

What themes were discussed in the Literature Review?

Cave back fill grouting  shows how the caving rock is strengthened with filling materials before it compacted using fly-ash and mine water.

Design:

Space between caving rock and natural roof is backfilled and stops the overlying strata which is dangerous when falldown during mining operations.

What was the finding?

Due to cave backfill grouting process , 43.46% of filling rate is obtained,and also effectively helps in improvisation of surface subsidence coefficient.

What were the gaps?

In the process of cave backfill we can also use overburden which is extracted in underground mine.

Reference Number: 2

What was the research question?

Emplacement of mine rejects in underground voids:technologies and challenges

What themes were discussed in the Literature Review?

Acid mine drainage, backfilling material used for backfilling the mine voids,insitu treatment of acid-mine drainage(AMD)

Design: coal fly ash which is collected from regional powerstations from which sludge is collected can be used as backfill the mines.

What was the finding?

Transferring of contaminants between acid mine drainage and coalfly ash depends on ph and quality levels of mine water. Mine voids are backfilled by Coal fly ash(CFA)

What were the gaps?

pH and quality of mine water should be relevant inorder perform the process better.

Reference Number: 3

What was the research question? Emplacement of mine rejects in underground voids: technologies and challenges.

What themes were discussed in the Literature Review?

Controlling the subsidence using backfill mining technology, overburden strata

Design: few sensors of displacement are equipped inorder to supervise roof subsidence, also bore holes were designed at tailgate of mining face in Tangshan coal mine.

What was the finding?

Fracture of overburden information can notoriously reduced by backfill mining technology. Gauge plays a key factor in slowing down the overburden subsidence.

What were the gaps?

Though gauge plays a major role in slowing down the subsidence, more methods can be applied which shows the subsidence level of roof accurately.

Reference Number:  4

What was the research question?

Emplacement of mine rejects in underground voids: technologies and challenges.

What themes were discussed in the Literature Review?

Backfilling material,solid backfill mining, shallow coal seam

Design:In the shallow coal seam backfilling samples which have different particle sizes are are collected with deflection, of stress and strain energy.

What was the finding?

With the successful implementation of Solid backfilling method(SBM) ,the roof can be seen deflecting without tensile cracking.

What were the gaps?the key layer of roof rock is collapse of roof in longwall coalmines in china, but gangue material which has higher compressive strength is relevant.

Reference Number :  5

What was the research question? Emplacement of mine rejects in underground mines: Technologies and challenges.

What themes were discussed in the Literature Review?

Hydraullic back-filling, fly-ash suspension.

Design: Fly-ash hydraulic transport system was designed in 1998 and still it is in operation and backfilling material is supplied through it.

What was the finding? 14400 tons of flyash is backfilled through flyash based hydraulic backfilling technology.

What were the gaps? In 2009 , backfilling which is experimental was failed . it is due to backfilled fly-ash. The exact problem which is not sorted out  with flyash could be mentioned because , if the backfilling problem is sorted out the technology can be successful .

Reference Number: 6

What was the research question?

Emplacement of mine rejects in underground voids: technologies and challenges.

What themes were discussed in the Literature Review?

Backfilling, Aeolian sand, cement materials, close packing theory.

Design: Close packing theory in which Aeolian sand is used as backfilling material and tests were conducted.

What was the finding?

The strength and stability which is relevant for supporting the overhanging strata. By the sieving test in close packing theory, Aeolian sand is proved as optimal backfilling material.

What were the gaps?

From the setup room horizontal distance , there are no notorious changes observed ,more concentration of slurry may result in overburden failure and surface subsidence.

Reference Number: 7

What was the research question?

Emplacement of mine rejects in underground voids: technologies and challenges.

What themes were discussed in the Literature Review?

Filling the underground voids which are occurred during mineral extracting operations.

Design: filling the cavings for safety purposes with the mixture of flyash and water.

What was the finding?

Cavings in underground mines has been stopped to an extent with the selection  of mixture of fly-ash and water.

What were the gaps?

This  process is only suitable for this fly-ash water mixture process only.

Reference Number: 8

What was the research question?

Emplacement of mine rejects in underground voids: technologies and challenges.

What themes were discussed in the Literature Review?

Solid back filling mining, Hard roof, Filling ratio.

Design: Backfill hydraulic supports in which the canopy is supported roof, which results in free working of mining machines, Gangue , dune sand is transported to undergrounf through belt conveyor to backfill face

What was the finding?

solid back filling effects positively to reduce facebursts based on geological conditions.

What were the gaps?

Transporting sand, other materials from surface for backfilling maybe a time taking process. Overburden from undergeround can be used.

Reference Number: 9

What was the research question?

Emplacement of mine rejects in underground mine voids: technologies and challenges.

What themes were discussed in the Literature Review?

Coal ash disposal, Filling cavity,computational fluid dynamics.

Design: Volume of fluid method , coal ash injection which is sent into mine cavities in korea.

What was the finding?

Usage of lower injection method which packs the cavity tightly provides higher density, at the bottom of the mine cavity,nozzle of the injection should be pointed at the cavity.

What were the gaps?

If the nozzle of injection is not pointed at the cavity the process may not distribute properly.

Reference Number: 10

What was the research question?

Emplacement of mine rejects in underground voids: technologies and challenges.

What themes were discussed in the Literature Review?

Cemented mill tailings, backfillings are the themes discussed .

Design:  mill tailings are used for underground mine voids stopping.

What was the finding?

Void filling in metalmining with mill tailing is the effective process. Different types of mixtures  are used in this type of backfilling operations.

What were the gaps?

Mill tailing process is only  more effec tive only in underground metal mines .

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Total 14 pages

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My Assignment Help. (2021). Systems Design And Engineering. Retrieved from https://myassignmenthelp.com/free-samples/engg851-systems-design-and-engineering/technologies.html.

My Assignment Help (2021) Systems Design And Engineering [Online]. Available from: https://myassignmenthelp.com/free-samples/engg851-systems-design-and-engineering/technologies.html
[Accessed 29 November 2022].

My Assignment Help. 'Systems Design And Engineering' (My Assignment Help, 2021) <https://myassignmenthelp.com/free-samples/engg851-systems-design-and-engineering/technologies.html> accessed 29 November 2022.

My Assignment Help. Systems Design And Engineering [Internet]. My Assignment Help. 2021 [cited 29 November 2022]. Available from: https://myassignmenthelp.com/free-samples/engg851-systems-design-and-engineering/technologies.html.


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