Activity is increasing at Chatree as Kingsgate readies for mining in the A Pit West, where about 200,000 tonnes of broken waste rock and ore remain from when the mine was closed in 2016.
The mine was forced to close by Thailand's military junta, after accusations the mine was causing environmental and health concerns for local villagers.
A settlement was later negotiated as part of the Thailand-Australia Free Trade Agreement, which led to Chatree reopening in May.
The mine includes multiple open pits and two carbon-in-leach processing plants.
Initial works will target 40,000t that can be mined without blasting.
With the first shipment of explosives on-site, work has started on a series of blast holes that should be ready to charge in November.
Mining contractor LotusHall Mining is due to ramp up the mining schedule in coming months when the mining fleet arrives, with new Caterpillar 395 excavator and five Caterpillar 777 dump trucks arriving in mid-November.
Work will continue on an ongoing grade control drilling program at Chatree, with operators training on simulators before finishing their lessons on the Epiroc rigs.
Kingsgate executive chairman Ross Smyth-Kirk said the company was delighted to achieve another important milestone in the restart of Chatree.