Mining and Minerals Engineering

CSM3302 - Surface Excavation Design (2012)

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MODULE TITLESurface Excavation Design CREDIT VALUE10
MODULE CODECSM3302 MODULE CONVENERDr Denise Pascoe (Coordinator)
DURATION: TERM 1 2 3
DURATION: WEEKS 9
Number of Students Taking Module (anticipated) 59
DESCRIPTION - summary of the module content

This module provides application of rock engineering principles to the design of surface excavations. It uses stereographic evaluation to identify potential failure modes before assessment of each failure mode in more detail. Blast design practice is also considered together with an awareness of factors influencing the choice of appropriate design strategies for different slope failure mechanisms. The material is taught through a series of lectures and case examples. A computing tutorial is given for evaluation of planar failure. Students are required to submit an assessment based on a design exercise.

Students should have studied CSM2300 or equivalent.

This module is unsuitable for  non-specialist students

This module is not recommended for interdisciplinary pathways.

AIMS - intentions of the module

The module provides specialist design skills associated with quarry, civil, geotechnical, environmental and related industries. The module also provides an opportunity for students to gain an awareness of hazard appraisal and risk assessment applied to slope instability assessment.

INTENDED LEARNING OUTCOMES (ILOs) (see assessment section below for how ILOs will be assessed)

On successful completion of this module you should be able to:

Module Specific Skills and Knowledge:

1.To appraise and assess the roles and limitations of analytical and computer methods in surface excavation stability analysis and design.  

2.To be able to evaluate factors controlling instability, support and reinforcement of excavated and filled slopes

3.To fully appreciate the data requirements for the design of surface excavations, including considerations of data variability and risk assessment.

4.To be able to design suitable excavation dimensions and geometry for varying rock materials.

5.To understand the key components of the design of blasting for surface excavations

Discipline Specific Skills and Knowledge:

6.Students should be able to evaluate and apply knowledge to specific design tasks.

7.Students should be able to choose an appropriate design approach from critical evaluation of available data

8.The student should be able undertake synthesis of information and create responses in terms of advanced knowledge

9.The student should be able to undertake analysis of complex, incomplete or contradictory areas of knowledge and make appropriate decisions in order that the task may be completed

10.The student should be able to develop data-handling skills through critically evaluation of a design problem and produce, to a strict deadline, detailed recommendations/reasoned arguments for an appropriate solution. The module provides development of problem-solving and data manipulation skills

Personal and Key Transferable/ Employment Skills and  Knowledge:

11.Independent learning skills are used for analysis of case history information.

12.The student will develop report-writing and IT skills

SYLLABUS PLAN - summary of the structure and academic content of the module

The main subject areas are slope failure mechanisms, slope design, case histories, stabilisation, excavation methods and blast design. Stereographic interpretation is used to assess the kinematic potential for different types of slope failure (plane, wedge, topple). Deterministic and statistically based computer methods are introduced for analysis of slope failures and designs of new slopes. Design parameters are determined from laboratory and field-testing and back-analysis. Shear strength of discontinuities are evaluated. The effects of water pressure and stabilisation by dewatering, regrading and ground anchors are introduced. Case histories are introduced of slope failures and stabilisation measures taken from civil and mining engineering experience. Implications of tip and tailings dam design are reviewed, together with an appreciation of the geotechnical implications of the Quarries Regulations (1999). The composition and characteristics of commercial high explosives and blasting agents are studied including the use of electric and non-electric detonation systems, misfires, regulations and safety. Blast design includes the design path to an optimum blast, bench dimension specifications, blasting geometry, charge calculations, single and multi-row blasts. The following is a typical lecture plan Lecturer RJP JSC/DMP AW Week 1 Failure mechanisms Stereographic analysis History and Industrial legislation Week 2 Discontinuity shear strength Stereographic analysis Blast design Week 3 Discontinuity shear strength Quarry Regulations Vibration & Environmental Problems Week 4 Planar failure Quarry Regulations Timing circuits, blast initiation Week 5 Planar failure Wedge failure Blasting specification Week 6 Circular failure Rockfall Types of explosives Week 7 Circular failure Stabilisation Rules of Thumb Week 8 Instrumentation Stabilisation Note: Planar instability tutorial – 2 hours (small group split – week 6, 7 or 8) Blast design exercise -3 hours (week 8 or 9)

LEARNING AND TEACHING
LEARNING ACTIVITIES AND TEACHING METHODS (given in hours of study time)
Scheduled Learning & Teaching Activities 29.00 Guided Independent Study 71.00 Placement / Study Abroad
DETAILS OF LEARNING ACTIVITIES AND TEACHING METHODS
Category Hours of study time Description
Scheduled learning & teaching activities 27 Lectures
Scheduled learning & teaching activities 2 Computing sessions
Guided independent study 71 Private study

 

ASSESSMENT
FORMATIVE ASSESSMENT - for feedback and development purposes; does not count towards module grade
SUMMATIVE ASSESSMENT (% of credit)
Coursework 30 Written Exams 70 Practical Exams
DETAILS OF SUMMATIVE ASSESSMENT
Form of Assessment % of Credit Size of Assessment (e.g. duration/length) ILOs Assessed Feedback Method
Examination 70 1.5 hours   Tutor meeting
Technical report 30 1200 to 2000 words   Written
         
         
         

 

DETAILS OF RE-ASSESSMENT (where required by referral or deferral)
Original Form of Assessment Form of Re-assessment ILOs Re-assessed Time Scale for Re-reassessment
Summative assessment Additional assessment As above August Ref/Def period
Examination Additional examination As above August Ref/Def period
       

 

RE-ASSESSMENT NOTES

As above 1 piece of CW 30% and/or 1 Exam 70%

RESOURCES
INDICATIVE LEARNING RESOURCES - The following list is offered as an indication of the type & level of
information that you are expected to consult. Further guidance will be provided by the Module Convener

ELE – College to provide hyperlink to appropriate pages

Web based and electronic resources:

http://www.rockeng.utoronto.ca/roc/Hoek/Hoek.htm

Reading list for this module:

Type Author Title Edition Publisher Year ISBN Search
Set Brady, B and Brown, E.T. Rock mechanics for underground mining Chapman & Hall. 2004 [Library]
Set Bromhead, E.N. The stability of slopes Surrey University Press, Blackie & Son Ltd. Surrey University Press, Blackie & Son Ltd. 1985 [Library]
Set Harrison, J.P. and Hudson J.A Engineering Rock Mechanics Part II: Illustrative worked examples Elsevier 2000 [Library]
Set Hoek, E. and Bray, J.W. Rock slope engineering 3rd 1981 [Library]
Set Hoppe, R. ed. E/MJ Operating handbook of mineral surface mining and exploration. McGraw Hill, 1978 [Library]
Set Hudson J.A. and Harrison J.P. Engineering Rock Mechanics and introduction to the principles. Permagon 2005 [Library]
Set Turner, K.A. & Schuster, R.L. Landslides: investigation and mitigation. Transportation Research Board Special Report 247 Washington: National Research Council. 1996 [Library]
Set Wyllie, D.C. and Mah, C.W. Rock slope engineering Electronic Spon Press 2004 [Library]
Set Atlas Powder Co Explosives and Rock Blasting 1987 0-96162840-0-5. [Library]
CREDIT VALUE 10 ECTS VALUE 5
PRE-REQUISITE MODULES CSM2300
CO-REQUISITE MODULES
NQF LEVEL (FHEQ) 3 (NQF Level 6) AVAILABLE AS DISTANCE LEARNING No
ORIGIN DATE Monday 12 March 2012 LAST REVISION DATE Wednesday 17 October 2012
KEY WORDS SEARCH Slope stability, stereographic projection, blast design, planar failure, wedge failure, toppling failure