Execution uncertainty in open-pit blasthole drilling from operational records: provenance audit, Bayesian crossed random-effects analysis and the value of risk-ranked dip checking

This dataset contains operational drill-and-blast records supporting the manuscript “Execution uncertainty in open-pit blasthole drilling from operational records: provenance audit, Bayesian crossed random-effects analysis and the value of risk-ranked dip checking.” The study concerns one production blast pattern on a waste bench of an open-pit metal mine. The records contain 670 hole identifiers across 15 rows. Drilling took place between 22 December 2025 and 3 January 2026, and loading between 26 December 2025 and 5 January 2026. The mine operator and location are withheld for confidentiality. The six files comprise five CSV exports covering drilling by hole, drilling lengths and dip measurements, explosive loading, charge mass, and stemming length, together with a DXF blast-boundary file. The DXF does not provide surveyed hole-collar coordinates. The associated research examines measurement provenance, blasthole depth variability, recorded quality-control outcomes, and hypothetical risk-ranked inspection policies. Fields labelled “actual” should not automatically be interpreted as independently measured execution. Similarly, a changed depth record does not by itself establish a separate inspection event. The field data belong to the mine operator. Public release is restricted, and access or reuse requires the operator’s approval. This record describes operational data; it does not constitute an approved blast design or an operational recommendation.