24-MMP-A5 Surface Mining Methods and Design · December 2016
Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
Surface Mining Methods and Design (09-MMP-A5) — December 2016 National Exam. Compulsory Question 1 (six sub-questions) plus all five optional Questions 2–6 are answered in full below (candidates select only three of Questions 2–6 in the real exam; all are solved here as a complete study resource).
Reference texts: Hustrulid, Kuchta & Martin, Open Pit Mine Planning and Design (3rd ed.) — pit optimization, Lerchs–Grossmann, floating cone, dragline stripping geometry; SME Mining Engineering Handbook (3rd ed.); BC Health, Safety and Reclamation Code for Mines; Newnan, Eschenbach & Lavelle, Engineering Economic Analysis — sinking funds and future-worth factors.
Question text not reproduced: the examination questions are © Engineers and Geoscientists BC. Open the official past paper (linked at the top of this page) to read the question, then follow the worked solution below.
Reclamation is the planned, progressive (and eventually final) physical and biological restoration of mine-disturbed land — regrading waste dumps and pit walls to stable slopes, re-establishing topsoil/growth medium, revegetating, and re-establishing drainage — to a pre-agreed post-mining land use (e.g. forestry, wildlife habitat, agriculture, or a safe permanent water body), governed in BC by the Health, Safety and Reclamation Code for Mines and secured up-front by a reclamation bond.
In a mining context, sustainability means managing a fundamentally non-renewable resource so that the ECONOMIC, SOCIAL and ENVIRONMENTAL value it generates (royalties, jobs, downstream manufacturing capacity, ecological function) outlives the ore body itself — i.e. planning from Day 1 for what the region does after mine closure, rather than treating sustainability as a closure-day afterthought.
Open pit mines face acid rock drainage/metal leaching from exposed sulphide waste and pit walls, groundwater drawdown and pit-lake water-quality management, tailings and waste-dump geotechnical stability (per GISTM/CDA guidelines), dust and noise on surrounding communities, and permanent landform/habitat change over a footprint that can exceed the ore body itself by an order of magnitude once waste dumps are included.
