One of Queensland's biggest coal miners will cut about 750 jobs across its operations, blaming the impact of high royalties imposed by the state government.

The BHP Mitsubishi Alliance says its Saraji South mine at Dysart will be mothballed from November.

BMA asset president Adam Lancy said in a statement the company did not want to see jobs lost, "but these are necessary decisions in the face of the combined impact of the Queensland government's unsustainable coal royalties and market conditions".

"The simple fact is the Queensland coal industry is approaching a crisis point," Mr Lancey said.

"This is now having real impacts on regional jobs, communities and small businesses.

"The uncertainty this creates for our people and our communities is not taken lightly, and we will do everyth

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