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A mathematical study of a deep exploration project: description of the simulation model and procedure
Umeå University, Faculty of Science and Technology.
1979 (English)Report (Other academic)
Abstract [en]

Simulation technique has been used for a feasibility study of a prospecting project for deep seated ore bodies.The simulation model is divided into three main parts:

1)The bedrock model - the mathematical model of the geology in the investigated block.

2)The ore model - the mathematical model of the "economical" targets within the investigated block.

3)The drilling model - the mathematical description of a borehole.

Each part makes use of several parameters which make it possible to study different prospecting situations. Distribution functions for the parameters are estimated according to the geology of the Skellefte ore field.The simulation procedure consists of three parts:

1)Random location and determination of the geometry of ore bodies.

2)Location of boreholes.

3)Drilling procedure.

The simulation procedure is realized in a computer by a system of computer programs.

Place, publisher, year, edition, pages
Umeå: Umeå universitet , 1979. , 21 p.
National Category
Mineral and Mine Engineering
Identifiers
URN: urn:nbn:se:umu:diva-74355OAI: oai:DiVA.org:umu-74355DiVA: diva2:633654
Projects
digitalisering@umu
Available from: 2013-06-27 Created: 2013-06-27 Last updated: 2013-06-27Bibliographically approved
In thesis
1. A feasibility study of exploration for deep seated ore bodies in the Skellefte field
Open this publication in new window or tab >>A feasibility study of exploration for deep seated ore bodies in the Skellefte field
1979 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Simulation technique has been used for a feasibility study of a deep exploration project for massive sulphides in an old mining district, the Skellefte field. The outcome under very different conditions has been studied. Under the specific conditions of the well known Skellefte field it is found to be possible to even calibrate the mathematical model.It is found that when the geology is not known in detail, an outcome of the order of 50 tons per meter drillhole is to be expected under a simple drilling strategy.When a certain knowledge about the general structures down to around 1 000 m is established, it is possible to improve the outcome by a factor of 2 through an optimization of the depth of investigation. The optimal depth of investigation is in the order of 500 m.On the other hand, when a minimum ore value is introduced as a function of depth, the expected outcome will again decrease with a factor of about 3.It must be underlined, that these results are average values in a mathematical model and do not say anything about the outcome in the single exploration case. However, in exploration campaigns of the order of 40 drillholes to a depth of 1000 m an analysis shows that at least one deep seated large body was found in 25% ot the exploration campaigns.Faced with the problem whether to go or not to go into a deep exploration phase, this technique can headlight the problem and it can give an estimate about the order of costs and benefits.

Place, publisher, year, edition, pages
Umeå: Umeå universitet, 1979. 5 p.
Series
Report / UMINF, ISSN 0348-0542
Keyword
Monte Carlo simulation, deep exploration, massive sulphides
National Category
Mineral and Mine Engineering
Identifiers
urn:nbn:se:umu:diva-74353 (URN)
Public defence
1979-06-12, Samhällsvetarhuset, hörsal C, Umeå universitet, Umeå, 10:15
Projects
digitalisering@umu
Available from: 2013-06-27 Created: 2013-06-27 Last updated: 2013-06-27Bibliographically approved

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