Assignment Detail:- Mining Method Selection
In the sections fictitious ore deposits, each with different characteristics are defined- Based on the information provided, propose up to three mining methods for mining the orebody in order of preference if applicable- Also summarise the most important reasons, factors, characteristics or conditions that were most influential in your first choice of mining method-
In presenting the assignment students are requested to provide no more than a single page of A4 for each deposit- Also note dot point presentation is suitable- Marks for the assignment will be based on the suitability of the first choice mining method and the reasons for selecting this method and on the conciseness of the reasoning- It should also be noted that there is no one single method of mining each deposit-
Deposit 1:
A tabular, narrow vein steeply dipping gold deposit- Grade averages around 18 g/tonne but is variable- Ore body width varies from 2 to 3 m and dip between 70 to 80°- Mean depth is about 500m- The ore is strong, 200 MPa, with very little fracturing- The footwalls and hanging walls are weak, UCS 100MPa, also with very little fracturing-
Deposit 2:
A coal seam 2-5 m thick, located 1000m underground- Dip is about 2°- The mining lease is located in mixed rural and urban area- The coal is underlain by a reasonably competent mudstone and overlain by a series of typical coal measures strata- Underlying and overlying the seam are a number of very thin < 20cm thick coal seams within 200m of the seam to be mined-
Deposit 3
A massive porphyry style deposit located at high altitude in West Papua- Average grade of the deposit is 0-5 g/t Au and 0-8% Cu- The deposit has a UCS of 200MPa and is highly fractured; country rock is similar in nature- The deposit has a large foot print area 500m by 500m and is located 300m from surface and open at depth-
Deposit 4
A coal seam 5 m thick, located 300m underground- Dip is horizontal- The mining lease is located in rural area- The coal is underlain by a reasonably competent mudstone and overlain by a series of typical coal measures strata-
Deposit 5
A tabular steep set of 5 lead zinc deposits with a constant width of 20 m- Dip is almost constant at 55°- Average separation of the deposits is 10m Mean depth is 500m from surface and the grade is constant at 5% Ni- Both ore and country rock are of moderate strength, UCS 130 MPa, with little fracturing-
Attachment:- Mining Method Selection-rar
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