澳洲论文网:澳洲留学生项目管理论文定制;Bri
时间:2011-05-05 08:53:22 来源:www.ukthesis.org 作者:英国论文网 点击:242次
criteria will be: Bridge of Allan Copper Mine Introduction Copper and silver were mined at various locations in the Ochil Hills until 1807. Evidence of the mining activity can be seen in the woods at the back of Bridge of Allan, including the prominent, blocked entrance in Mine Wood. The mines have been long abandoned as uneconomic but recent increases in commodity prices have caused various mining prospects to be reassessed. The Airthrey Mining Company (AMC) was formed two years ago and has already undertaken much prospecting and proven that there are small but rich reserves of copper well worth extracting. Considerable public relations work has persuaded the local communities of the value of the project to Scotland’s strategic economic development and outline planning permission has been agreed. AMC believe that there should be sufficient reserves for a long term operation and many experts believe that the high copper prices should continue for many years. However, AMC want to establish the first phase of the mine quickly so that the mine can take full advantage of current market conditions. Sensible approximations should be adopted where appropriate. The report should be written using the standard guidelines. Include a section summarizing possible further studies that you would recommend to provide a more complete assessment.#p#分页标题#e# Geology While the general geology has been proven and there is every confidence that the copper reserves are as claimed, the precise geology is not known. A more detailed geological knowledge is needed to provide information about the nature of the ground being tunnelled through and the exact location of the copper veins. More boreholes need to be sunk to provide cores of the geological strata from key locations, see Figure 1. Ten boreholes are required: four associated with the drift, two with the shaft and one with each vein. The mine cross section and plan indicate the approximate locations of the shaft, drift, roads and boreholes. There is no need to complete all the boreholes before mining begins, but each borehole must be finished before the immediately previous stage of the associated mining development can start. For example bore 1 must be finished before the main drift is started but the drift may then progress to the bottom of bore 1, even though bore 2 etc. may not be completed. However, tunnelling the drift can not continue to the intersection with roads 3 and 4 until bore 2 has been sunk. Similarly the sinking the shaft can not begin until bores 5 and 6 have been completed.
The boreholes will be drilled using a lightweight drilling rig which is attached to a tractor. This rig can thus cross rough country and does not need any specially built roads. The rig is fairly primitive but it is relatively cheap. A specialist firm hires out the rig at a fixed cost of £100 000 plus £1000 per day for the equipment and support team. Extensive experience indicates that a drilling rate of 4m per day should be achieved. It is hoped that only one rig will be used though more might be made available if really necessary. It has been estimated that the economic life of each of the four veins to be worked in the proposed development are: The proposed development should establish the expensive key infrastructure: surface transport facilities, shaft and underground drift. This development will also involve the driving of four underground roadways to access four veins of copper ore for extraction. It is argued that even if the first phase of the development (working veins 1-4) is not quite viable (using the company’s standard 20% p.a. discount rate) future phases with extended roadways to access new veins should be very profitable. However, there is no detailed assessment of the geology of any additional veins at present. Mine Development The main drift will provide access from Bridge of Allan, at an entrance opposite the tennis courts, sloping down to intersect a shaft sunk from Cuparlaw Wood, see Figure 2. The underground access roads (1-4) will link the drift, shaft and the four copper veins. A mixture of conveyor belts and underground trains will be used in the drift and roadways to transport men, materials and the copper ore. The roads can be driven as soon as access is possible, either via the shaft or drift. Data describing development work at other mines have been collected for the sinking of the shafts and driving main drifts and the smaller access roads, such as roads 1-4. The costs include all labor, machines and essential materials, such as concrete lining for the shaft, but exclude fittings, see separate section below. There is the possibility of using a new shaft sinking machine which has had considerable success in other mining developments. The new machine has proven a reliable rate of 1.5 metres per day but the costs, including all the skilled support required and essential materials, are £70000 per day. While this might be an option, the great expense raises a question on its economic justification. Mine Operation and revenue No removal of ore is allowed until both the shaft and the drift have been completed, providing the ventilation needed for the larger workforce employed in extraction. Estimates have been made of the operating costs of the mine and the daily revenue from the veins once ore extraction begins:
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Purchasing A number of specialized items of equipment have to be procured with long lead times: ![]() Surface Services While most of the activity and expense is involved with the underground development, there are a number of vital surface facilities necessary for the mine's operation:#p#分页标题#e# Personnel While the specialist manpower required for the development of the mine will be supplied on a contract basis, a permanent workforce will be needed for the routine operation of the mine: the extraction and transport of the ore. Recruitment should begin 6 months before the start of any ore extraction. Planning permission and start date 澳洲论文网Outline planning permission has already been agreed. Once the board of AMC confirm the project, work could start as soon as 1 June 2010. Project management and mine supervision It is estimated the cost of project management during the development of the mine and the cost of supervision once the mine is operational will be about £3000 per working day. |