minehaulsim

Software note (CC-BY-4.0): "minehaulsim: A Deterministic Discrete-Event Simulator of Mine Haulage on a Constrained Road Network", concept DOI 10.5281/zenodo.21512291 (source in manuscripts/haulage-des/). It gives the constrained-network model, the speed-by-grade kinematics, and a deterministic demonstration (throughput saturation, emergent congestion, and a dispatch-policy gap) on a generated pit.

Deterministic discrete-event simulation of open-pit and underground mine haulage on constrained road networks, with seeded parametric mine generators.

No open-source package simulates mine haulage on a real constrained road network: existing OSS simulators use one fixed mine layout, scalar distance matrices, no grades/rimpull and no traffic constraints, and the tools that do this right (HAULSIM, TALPAC-3D, SimMine) are commercial and closed. minehaulsim fills that gap:

• Constrained road network, first-class. Haul routes are a directed multigraph: one-way ramps, width/passing classes, junction blocking, direction zones (single-lane drifts with passing bays), speed-by-grade from rimpull/retarder curves, travel times come from the network, not scalars.
• Genuinely varied mines. Seeded parametric generators for open pits (benches, phases, spiral/switchback ramps, multiple faces/dumps) and underground multi-level mines (levels, declines, shafts, ore passes, drifts), a different, valid mine per seed, never one shape reused.
• Deterministic DES core. Hand-rolled event engine (no simpy); a run is a pure function of (spec, policy, seed), byte-identical outputs across OS/sessions. Dispatch-policy hook with baseline policies included.
• Interoperable outputs. cyclelog/v1 CSV event logs (load/haul/dump/return), provenance JSON, a per-truck position trace, and topography exports for 3D viewers.
• numpy-only core. Visualization is an opt-in extra; the core never imports matplotlib.

Scenario variety: the gallery

Twelve scenarios from one generate_batch(12, seed=2026) call, every one passing the seven validity gates with a unique structural signature (full set + per-pit summaries in gallery/; regenerate with python scripts/gen_gallery.py):

Status

0.10.000, the first published release: equipment + rimpull kinematics, constrained routing, deterministic DES with per-segment traffic (emergent bunching), the full haul cycle with five dispatch policies, a mine-planning layer (phases, depletion, slope damage, speed zones), underground multi-level mines with LHD/ore-pass inventory coupling and three flow modes, opt-in failure processes with a CI-enforced performance floor, the DispatchLab IO contracts, the varied generators, the viz extra and the CLI. Per-unit history in CHANGELOG.md.

Docs: the navigable wiki starts at docs/README.md, read docs/what-it-is-and-isnt.md before trusting any number.

Install

pip install minehaulsim            # numpy-only core
pip install "minehaulsim[viz]"     # + matplotlib renders

# development
pip install -e ".[dev]"
pytest

CLI

minehaulsim generate --seed 42 --out out/     # validated spec JSON (+ plan SVG with [viz])
minehaulsim batch --n 10 --seed 2026 --out samples/
minehaulsim run --spec out/openpit-42.minespec.json --policy minqueue --out out/
minehaulsim render --spec out/openpit-42.minespec.json --out out/
minehaulsim validate out/mhs-openpit-42-minqueue.csv
minehaulsim demo

Honesty

This is a simulation package: equipment curves are class-representative (not OEM data), generated mines are synthetic (structure-real at best, and always labelled), and nothing here predicts a real operation without calibration. The docs carry a dedicated what-it-is-and-isn't section.

License

Apache-2.0.