Down-the-hole (DTH) drill rigs can be classified in various ways based on their characteristics; two such methods are listed below:
1. Based on the operating environment, DTH drill rigs are categorized into underground and surface types. Underground rigs are further classified into self-propelled and non-self-propelled models depending on the presence of a travel mechanism; surface DTH rigs are widely used in my country and are predominantly self-propelled. Common underground models include the K7-80 and KQJ-100, while surface models include the KQ-100, KQ-150, KQ-200, and KQ-250.
2. Based on hole diameter, DTH drill rigs are classified as light-duty (80–100 mm), medium-duty (150 mm), heavy-duty (200 mm), and extra-heavy-duty (250 mm).
3. Based on structural configuration, DTH drill rigs are classified as either integrated or split types.
4. Based on the exhaust method, they are classified into side-exhaust and center-exhaust types.
5. Based on the shape of the cemented carbide inserts on the drill bit face, they are classified into blade-type, button-type, and hybrid (blade-and-button) types.
Additionally, integrated DTH drill rig products, such as the XQZ and SWDE series, have also been introduced.
