6. Waste Dumps

BRIEF SUMMARY

Module 6 of the diploma in Geotechnical Design of Tailings Dams, Waste Dumps, and Leaching Pads aims to delve into the key aspects of the geotechnical design of waste dumps (excess material deposits, spoil heaps, or dumps). Unlike tailings deposits, these structures are composed of various materials, including large blocks, making their characterization difficult due to the size of laboratory equipment and the impracticality of using field tests. Waste dumps have different design criteria compared to tailings deposits, and the current state of practice is summarized in the book “Guidelines for Mine Waste Dump and Stockpile Design” (2017) by editors Mark Hawley and John Cunning.

The module begins with a review of the dynamic analysis of mine waste deposits using advanced constitutive models (SANISAND-Sf and PM4Sand). This will involve a case study of an existing tailings dam located in a high seismic activity area. Details will be explored regarding the characterization of the materials involved, the selection of the design earthquake according to the classification of the deposit, the processing of time history records to be used, criteria for defining mesh size, calibration of the models with cyclic laboratory results, and finally the results obtained in terms of horizontal and vertical displacements (settlements) and generation of excess pore pressure (potential cyclic liquefaction). These results will be used to evaluate whether the deposit will suffer severe or moderate damage due to the selected earthquake.

Subsequently, key aspects in the design of waste dumps will be studied, such as the appropriate site selection for constructing the structure, the risk classification of the deposit, which differs from that used for tailings deposits, the characterization of materials, especially mine waste, using laboratory tests, and stability and deformation analyses. Details will also be covered on other factors influencing the performance of waste dumps, such as water management, risk management, management of acid-generating materials, and the use of emerging technologies in the disposal of waste materials.

BENEFITS

► Receive certification in the name of the International Geotechnical Center as a specialist in Tailings Dams, Waste Dumps, and Leach Pads Design.

► Get trained by an experienced speaker in the field.

► Receive slides and materials for each module.

► Be able to make necessary academic inquiries through the CGI Virtual Campus forums.

► Choose the start date and complete the diploma at your own pace and schedule within the access period. You can pause and review the videos as many times as needed to grasp the knowledge being imparted.

► Access a network of professionals from various countries worldwide. Our diploma program includes technicians, university students, engineers, master's, doctoral, and post-doctoral candidates, as well as individuals from various professional backgrounds.

► Access the database of participant inquiries and responses, as well as technical reports generated in each module and supporting theses.

OBJECTIVES

► Detailed Review of Dynamic Analysis of Mine Waste Deposits

► Study Key Aspects in the Design of Waste Dumps

► Evaluate the Method Proposed by Hawley and Cunning (2017) for Classifying Waste Dump Deposits According to Their Risk Potential

► Determine Shear Strength Properties of Waste Dump Materials Using Laboratory Tests

► Provide Additional Recommendations Such as Water Management, Risk Management, Management of Acid-Generating Materials, and Showcase Emerging Technologies in Waste Dump Material Handling

SYLLABUS

► Module 6: Waste Dumps

a. Nonlinear Dynamic Analysis (NDA) of Mine Tailings Deposits

b. Important aspects in the design of waste deposits ("clearings")

c. Design Guides and Construction Criteria

d. Classification of waste deposits

e. Characterization of Mine Waste Materials

f. Stability and deformation analysis

g. Water Management and Geochemical Considerations

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