The inquiry into black lung has been extended to cover more workers and given greater powers.

The Queensland Parliament approved the extension of the terms of reference on Thursday to cover occupational respiratory dust exposure for coal port workers, coal rail workers, coal fired power station workers and other workers.

Jo-Ann Miller, heading a parliamentary committee tasked with investigating black lung, is the daughter and granddaughter of miners. Credit:Chris Hyde

The committee will also write a draft bill for consideration by the Legislative Assembly, a reasonably rare move.

The Coal Workers' Pneumoconiosis Select Committee will look at the roles of government departments and agencies, industry, health professionals and unions; legislation; government and industry regulation; methods for monitoring dust and personal protective equipment.