Write a Report

  • Status Completed
  • Budget $30 - $250 USD
  • Total Bids 12

Project Description

A new open pit mine is in the process of being planned as a fly in fly out operation in Northwest

Queensland. The overburden material consists of approximately 100m of limestone’s, shales and

siltstones overlying a deposit of shales, siltstones and sandstone containing ZnS and PbS, which are

to be extracted. The proposed pit design is for a final pit depth of 200m, a stripping ratio of 11:1, with

the final pit shape being roughly circular with a maximum diameter of 1km at the original surface. The

ore materials are sulphides and oxidise readily. The local weather pattern is of a long dry season in

which occasional storm events of 3-hour duration and rainfall of 10 mm/hr and a short wet season

during which storm intensities are 6 hours at 50 mm/hr. The local environment is typical semiarid

vegetation and a few ephemeral creeks cross the proposed mine site.

The purpose of this exercise is that the student should undertake the following steps:

1. An environmental risk assessment;

2. Determine a suitable conceptual design for the mine waste and mill waste dumps given that

there is potential for acid water generation;

3. For the case of liquid/semi liquid waste from the mill to conceptually design suitable

impounding and treatment facilities; and

4. Develop an environmental management plan which specifically addresses the problem of acid

mine drainage.

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