Mining Tools

Pilot · virtual borehole at your position

Plan · coal-top depth

Shallow

Deep

Easting Northing

Tap anywhere on the plan to drill a virtual borehole.

Below your feet

Coal top at

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Total coal

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Stripping ratio

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Seams present

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Seam-wise detail

Seam	Roof RL	Floor RL	Depth to roof	Thickness	Parting above	GCV kcal/kg	Ash %	Cum. SR

Depths in metres below ground at the point. Cum. SR is the stripping ratio (m³ of OB and partings per tonne of coal) if mining goes down to the floor of that seam. All values are model estimates; check against the nearest borehole before use.

Road distance · haul lead

Carry the phone in the vehicle. Tap Start trip at the loading point, drive, and tap Stop at the unloading point. The app adds up the distance along the road you actually travel. Keep the app open and the screen on during the trip.

No trip yet.

Road distance

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Trip time

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Average speed

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Steepest gradient

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Start and stop points

Start point name Stop point name

Point	Easting	Northing	Level RL m	GPS alt. m	Time
Start and stop are set by the first and last point of the trip.

Level RL is read from the model ground surface at each point, which matches your survey levels when the topo is current. GPS altitude is shown for reference only; phone GPS height is usually ±10–15 m.

Saved trip	Start RL	Stop RL	Level diff m	Distance km	Time	Steepest	Source	Date

Export route for your surface plan

Include RL (3D polyline, Z from model ground)

Coordinates are in your mine grid (UTM plus the shift in Settings), the same as the surface plan. The DXF has the route as a polyline on layer HAUL_ROAD with start and end labels. In AutoCAD: open the DXF, select all, Ctrl+Shift+C with base point 0,0, then in your surface plan Ctrl+Shift+V at 0,0. Or use the AutoCAD command: turn off Object Snap (F3), click the command line, paste, press Enter.

GPS and gradient settings

Ignore GPS worse than (m) Minimum step (m) Permitted gradient 1 in

Readings worse than the accuracy limit are skipped, and steps shorter than the minimum step are ignored, so the distance does not grow while the vehicle stands. Jumps faster than 120 km/h are rejected. Gradient comes from the model ground surface along the track, checked over every 50 m, so keep the topo updated. Phone GPS distance on open haul roads is usually within 1–3%; deep pit walls can reduce accuracy.

Daily inspection

Pick a checklist, mark each item OK, Not OK or N.A., add a remark and a photo (live camera or gallery) where needed, and save. Each photo is stamped with date, time, location and item. Not OK items go to the open actions list until they are closed. Follow your mine's approved inspection format under CMR 2017; these lists are a field aid.

Checklist Shift Mine / project Location Inspected by Designation

Location not added.

Not OK

N.A.

Not checked

Only use after you have actually checked them.

Overall remarks Action by Target date

Open actions

Date	Checklist	Location	Item	Remark	Days open

Saved inspections

Date	Shift	Checklist	Location	By	OK	Not OK

Area volumes · coal and OB

Quick block · enter length and width

Length (m) Width (m) Length bearing (°) Point is the

Uses the point shown in "Below your feet": tapped, typed or GPS. Bearing is measured from north: 90° means the length runs east–west, 0° runs north–south. Use the strike or bench direction. From the start corner the length runs along the bearing and the width goes to its left (north for 90°).

Enter length and width above and tap Make block at my point. Or tap Mark area above the plan and tap the corners one by one, or paste boundary coordinates below. Results appear here.

Mine down to (floor of)

OB volume

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Coal

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Coal volume

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Stripping ratio

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Layer	Avg thickness m	Present over	Volume m³	Tonnes	GCV kcal/kg	Ash %

Method: the area is divided into small squares (sample spacing shown above). At each square the app reads ground RL and each seam's roof and floor from the model. Coal volume = seam thickness × square area. OB volume = (ground RL − floor of the lowest seam mined) − coal thickness, which includes all partings. Tonnes = coal volume × density from Settings. Seam GCV and ash are tonnage-weighted. Model estimates only.

Paste boundary coordinates

One corner per line: Easting, Northing (an ID column in front is fine). Copy from your survey sheet or AutoCAD LIST of a polyline.

Bench and face plan

A · Benches in the current pit

Finds the bench floors and faces in the latest pit survey (load it under Monthly pit surface). Flat ground lower than the original topo is grouped by level (RL) into bench floors. Areas are from a 5 m grid and include any pit floor at the same level; check face angles and bench widths with the survey.

Show benches on plan

B · Bench-wise quantities of the marked area

Mark the area first (Mark area on the plan, Quick block, or paste corners). The app cuts it into horizontal benches from the current surface down to the floor of the chosen seam and gives OB, coal and stripping ratio for each bench.

Bench height m A bench floor at RL Mine down to (floor of)

C · Plan blocks for the coming months

Save the marked area as a block for a month. Blocks are drawn on the plan in the month's colour, and the month-wise OB, coal and stripping ratio are added up.

Block name Month

Planning estimates from the seam model and the current surface. The approved mine plan, bench height and slope limits under CMR 2017 govern.

Load your model data

Export the grids from Minex as one CSV, one row per grid node. Columns: X, Y, TOPO, then for each seam NAME_ROOF and NAME_FLOOR. NAME_GCV and NAME_ASH are optional. Use the same coordinate system as the GPS setting below. Null values such as -99999 are treated as "seam absent".

X,Y,TOPO,VIII_ROOF,VIII_FLOOR,VIII_GCV,VIII_ASH,VII_ROOF,VII_FLOOR,...
302000,2300000,112.4,104.2,101.6,3950,38.5,79.8,76.4,...

Monthly pit surface (survey update)

Load the seam model once. Every month load only the latest pit survey (X, Y, Z points or grid, CSV or XYZ, same coordinates as the model). It replaces the ground surface where the survey covers it; the seams stay unchanged. Depths, stripping ratio and volumes then start from the current pit, and the app shows what was excavated and dumped since the previous survey.

Survey name Survey date

Coordinates and settings

Mine / project name UTM zone Shift E (m) Shift N (m) Coal density t/m³

GPS is converted from WGS84 to UTM (Angul falls in zone 45N), then the shift is added to reach your mine grid. Fix the shift by standing on 3–4 surveyed pillars and comparing. Phone GPS is good to about 3–5 m; an RTK receiver brings this to centimetres.

GPS needs the app opened as a web page over HTTPS on the phone. Inside the Claude viewer, location is blocked, so use Tap on plan or type the coordinates.