LI YUNFEI / FIELD NOTES
FIELD / 00124° 36′ N   ·   LY — 26

Cartographic Field Notes

Ground truth,
loosely held.

Writing at the intersection of mineral systems, applied data, engineering tools, and the ordinary world.

OBSERVATION BEFORE CERTAINTYREV. 08 / 2026
Abstract blue-gray mineral terrain with geological contour traces
PLATE A — WEATHERED STRATAAPPROX. SCALE / 1:25 000
E 042° 11′ 08″

01 / WRITING

Notes from the
working edge.

Observations are provisional. The archive keeps what survives contact with sites, spreadsheets, people, and time.

07 RECORDS SHOWN

02 / PROJECT

Tools built for
real constraints.

Software as field equipment: explicit inputs, inspectable assumptions, useful output.

TOOL / 001ACTIVE DEVELOPMENT

BLAST DESIGN / UNDERGROUND

Blast–Drafter

A practical drafting assistant for underground blasting engineers.

Standardises face parameters, charge calculations, and drill pattern output—reducing repetitive work while keeping engineering judgment visible.

CONTEXT
Underground production
METHOD
Field-led iteration
OUTPUT
Working blast plan
Open project

03 / STUDY

A syllabus made
in the field.

Structured notes for subjects that reward repeated return.

Open the complete study index →
MODULE / 0214 NOTES

MINING SYSTEMS

Underground Mining

Design logic, development, production methods, rock response, and the practical sequence of extraction.

Enter module
MODULE / 0308 NOTES

ENERGY / ROCK

Blast Design

Explosives, initiation, pattern geometry, fragmentation, vibration, and measured outcomes.

Enter module
WORKING / 01IN PROGRESS

PIXELS / EVIDENCE

Image Processing

Images as measurements: segmentation, scale, uncertainty, and the difficult distance between pixels and material truth.

Notes accumulating

04 / ABOUT

Engineer by training.
Observer by habit.

I work across engineering, data, and the stubborn reality of physical systems.

My field has moved through underground mines, blast plans, analytical models, and software tools. This site is where those threads are kept together—alongside notes on the wider world that engineering alone cannot explain.

The aim is simple: observe carefully, make assumptions visible, build things that can survive use, and revise when the ground says otherwise.

ORIGIN / CHINAFIELD / GLOBALLANG / ZH · EN · ES

05 / CONTACT

Start with a
good question.

If the problem is specific, the observation is unusual, or the work needs a field-minded collaborator, write.

[email protected]