Use of an Excavation Compliance Indicator to Assess Conformance to Slope Design

Seery, Joe; Lapwood, Jon

doi:10.36487/acg_repo/708_28

Cited by 1 publication

(2 citation statements)

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“…The excavation compliance indicator (ECI), as developed by Seery and Lapwood (2007), presents a methodology for quantifying implementation of the pit wall design. The technique measures compliance to design via measurement of the 'as-built' individual geometrical elements that comprise the bench geometry; i.e.…”

Section: Introductionmentioning

confidence: 99%

“…The ECI tool therefore provides quantifiable evidence to determine whether the design BFA is appropriate for the prevailing ground conditions. This has important implications since increasing or decreasing BFA and CBW in a kinematically designed slope may impact mine operations by increasing the risk of rockfalls or bench-scale failures, although increasing the potential for instability in the bench face is countered by an increase in catch retention for the potential spill volume (Seery & Lapwood 2007). At the Oyu Tolgoi (OT) mine, documented bench-scale failures are typically controlled by structure rather than rock mass failure.…”

Section: Introductionmentioning

confidence: 99%

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Use of the excavation compliance indicator at the Oyu Tolgoi copper–gold mine, Mongolia

Juldiz¹

2019

Proceedings of the First International Conference on Mining Geomechanical Risk

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Systematic assessment of 'as-built' open pit mine slopes is required to verify that slope design criteria are appropriate for the ground conditions and that slope designs are being correctly implemented by mine operations. It is imperative that design bench geometry and inter-ramp slope angles are delivered (in order to meet scheduled production targets), slope design acceptance criteria are achieved, and that geotechnical design risks are appropriately managed, so that the design intent is met. The excavation compliance indicator (ECI) as developed by Seery and Lapwood (2007) and presents a methodology for quantifying compliance to design via measurement of the 'as-built' individual geometrical elements that comprise the bench geometry; i.e. bench face angle (BFA), crest position, toe position and catch bench width (CBW). Measurements of these elements are combined and weighted in order to deliver an overall slope design conformance metric (i.e. the ECI score). The technique enables valuable insights into the contributing factors that adversely affect design implementation conformance, thereby enabling operational practices to be modified in order to deliver improved design achievement. This paper outlines how the Oyu Tolgoi (OT) open pit geotechnical team implements ECI and how it is integrated into their design reconciliation workflow. This paper also provides some recommendations for improving the ECI process.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%