Summary

Mine Type	Underground
Status	Active
Commodities	Coal (metallurgical) Coal (thermal)
Mining Method	Bord-and-pillar Longwall
Production Start	...
Mine Life	...
Snapshot	The Maxwell Underground mine produces high-quality Semi-soft coking and thermal coal. Maxwell is approved to extract up to 8 Mtpa of ROM coal from four seams within the Wittingham Coal Measures. During 2025, significant milestones in the development of the longwall operation were achieved. First coal from the longwall operation was cut and the life-of-mine pit bottom infrastructure was established. Subsequently, first coal from development activities at the longwall operation was produced and sold. During the period, construction of the ventilation shaft was completed. The bord and pillar operation, mining the Whynot seam, continued to ramp-up during 2025. Malabar Resources continues to progress the Maxwell Underground Mine including the ramp-up of the bord and pillar operation and the development of the longwall operation.

Deposit type

• Sedimentary

Summary:

The Project is located in the Hunter Coalfield in the northern part of the Permo-Triassic Sydney Basin, which forms the southern portion of the Sydney-Gunnedah-Bowen Basin (DMR, 1988).

The Wittingham Coal Measures occur widely within the Hunter Coalfield and contain many recoverable seams. The Project targets mining of the Whynot, Woodlands Hill, Arrowfield and Bowfield Seams.

The target seams are within the Jerrys Plains Subgroup, forming part of the upper and middle units of the Wittingham Coal Measures.

Above the target seams, the stratigraphy of the area consists of a sequence of sandstone, siltstone and laminate units within the Wittingham Coal Measures.

Geological Features
The target underground mining area sits on the western side of the Muswellbrook Anticline, which is a prominent regional geological feature. The strata in the area (including the coal seams) dip gently, with gradients varying between 3% and 5%.

Geological features identified in the target underground mining area and surrounds include:
• a north-northwest-orientated regional graben structure to the west of the Maxwell Underground;
• a north-east-trending fault located to the south-east of the Maxwell Underground with a throw of approximately 10 m;
• smaller faults within the mining area with throws of between approximately 2 m to 6 m;
• igneous dykes;
• dolerite sills intruded into the Whynot, Arrowfield and Bowfield Seams; and
• the Edderton Sill intruded into the interburden between the Whynot and Blakefield Seams, with a thickness of approximately 20 m.

The regional graben structure to the west of the Maxwell Underground comprises the East Graben Fault and the Randwick Park Fault.

The East Graben Fault is sub-vertical and has a downthrow of up to 20 m to the west into the graben which forms with the sub-parallel Randwick Park Fault, which has a throw of up to 50 m to the east.

Mining Methods

- subscription is required.

Comminution

Crushers and Mills

Processing

- subscription is required.

Commodity Production

Commodity	Units	2025	2023
Coal (metallurgical & thermal)	Mt	....	....

Operational metrics

Metrics	2025	2024	2023	2022
Coal tonnes mined	....	....	....
Waste	....	....	....	....
Reject	....	....	....	....

Personnel

Job Title	Name	Profile	Ref. Date
.......................	.......................		Oct 5, 2025
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